PLEASE HELP.!! ILL GIVE BRAINLIEST EXTRA POINTS DONT SKIP.!! :((

Answers

Answer 1

Answer:

B, 0.5

Step-by-step explanation:

We know the number has to be between 0 and 3.5. Instantly, we can rule out -2 and 3.6 because they don't fit that criterion.

Next, we can see that 2 would be more in the middle or towards 3.5 in this line. So, the answer is 0.5 because it is more towards 0 and not 3.5

Answer 2

Answer:

0.5

Step-by-step explanation:

i think

Related Questions

please help, much appreciated!!!! (will mark brainliest)

Answers

Answer:

16 years

Step-by-step explanation:

Answer:

Step-by-step explanation:

solve the equation
x^2+18x+81=25

Answers

Answer:

(x+9)(x+9)=25

Step-by-step explanation:

x^2+18x+81=25

or x^2+(9x+9x)+81=25

or x^2+9x+9x+81=25

or x(x+9)+9(x+9)=25

:: (x+9) (x+9) =25

the answer would be x=-4, -14

(a)A line through (2,1) meets the curve x²-2x-y=3at A (-2,5)and at B. Find the coordinates of B
(b) A(3,1) lies on the curve (x-1)(y+1)=4. A line through A perpendicular to x+2y=7 meets the curve again at B. Find the coordinates of B.

Answers

(a) To find the coordinates of point B, we need to first find the equation of the line passing through point A(-2,5) and point (2,1).

The slope of the line passing through these two points is:

m = (y2 - y1) / (x2 - x1) = (1 - 5) / (2 - (-2)) = -4/4 = -1

Using the point-slope form of the equation of a line, the equation of the line passing through A and (2,1) is:

y - 5 = -1(x + 2)

y - 5 = -x - 2

y = -x + 3

To find the coordinates of point B, we need to solve the system of equations formed by the equation of the line and the equation of the curve:

x² - 2x - y = 3
y = -x + 3

Substituting the second equation into the first, we get:

x² - 2x - (-x + 3) = 3

x² - x - 6 = 0

Solving for x using the quadratic formula, we get:

x = (1 ± √(1 + 24)) / 2 = 3 or -2

When x = 3, y = -x + 3 = 0, which means that point B is (3,0).

When x = -2, y = -x + 3 = 5, which means that point B is (-2,5).

Therefore, the coordinates of point B are (3,0) and (-2,5).

(b) We know that point A (3,1) lies on the curve (x-1)(y+1)=4.

Substituting x=3 and y=1 into this equation, we get:

(3-1)(1+1) = 4

4 = 4

Therefore, point A satisfies the equation of the curve.

We need to find the equation of the line passing through point A that is perpendicular to the line x+2y=7.

The slope of the line x+2y=7 is:

m = -1/2

The slope of a line perpendicular to this line is the negative reciprocal, which is:

m' = 2

Using the point-slope form of the equation of a line, the equation of the line passing through A(3,1) with slope 2 is:

y - 1 = 2(x - 3)

y - 1 = 2x - 6

y = 2x - 5

To find the coordinates of point B, we need to solve the system of equations formed by the equation of the line and the equation of the curve:

(x-1)(y+1) = 4
y = 2x - 5

Substituting the second equation into the first, we get:

(x-1)(2x-4) = 4

2x³ - 6x² + 4x - 5 = 0

We can use numerical methods to solve this cubic equation to get the value of x, and then substitute it back into the equation y = 2x - 5 to get the value of y. One possible solution is:

x ≈ 2.632
y ≈ -0.736

Therefore, the coordinates of point B are approximately (2.632, -0.736).

the body mass of a man is xkg.thebody mass of his two children are five-sixth and four_fifths of their father5 x over 6 + 4 x over 5 5 x over 6 + 4 x over 5

Answers

56/120

Step-by-step explanation:

The body masses of the two children in terms of their father's body mass, x, are:

First child's body mass = 5x/6 kg

Second child's body mass = 4x/5 kg

To express the body mass of the man's two children in terms of their father's body mass, we can use the given ratios.

Let the body mass of the man be x kg.

The first child's body mass is five-sixths of their father's body mass:

Body mass of the first child = (5/6) * x

= 5x/6 kg.

The second child's body mass is four-fifths of their father's body mass:

Body mass of the second child = (4/5) * x

= 4x/5 kg.

Therefore, the body masses of the two children in terms of their father's body mass, x, are:

First child's body mass = 5x/6 kg

Second child's body mass = 4x/5 kg

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It costs $2.37 to paint one square foot of wall. You need to paint a wall that measures 864.5 square feet. It will cost to paint that wall. (Round your answer to the nearest hundredth)
a $204.88
b $2,048.87
c $2,048.86
d. $2,848.87

Answers

Answer:

B- hope this helps:)

Step-by-step explanation:

The total cost to paint 864.5 square feet of wall is $2,048.87.

It is given that the cost to paint one square foot of wall is $2.37.

We are asked to find the total cost to paint 864.5 square feet of wall.

What are the different place values in a given number with a decimal point?

If we have a number that has a decimal point then we have two parts.

The whole number part and the fractional part.

After the decimal point, we will count the place value as tenths, hundredths, thousandths, and so on.

You can also see the given figure below.

We know that,

One square foot = $2.37.

Remember that Feet is the plural form of the foot.

We can write,

864.5 square feet = 864.5 x one square foot

Because in 864.5 square feet we have 864.5 one square foot.

And since one square foot cost $2.37.

864.5 square feet will cost 864.5 x 2.37 dollars.

Now,

864.5 x 2.37 = $2048.865.

Rounding to the nearest hundredth.

6 is in the hundredth place so we will round 86 to 87 since the number in the thousandth place is greater than 4.

Thus the total cost to paint a wall of 864.5 square feet is $2,048.87.

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It costs $2.37 to paint one square foot of wall. You need to paint a wall that measures 864.5 square

Pls help me it’s overdue!!!

Answers

Answer:

Step-by-step explanation:

a = 1935 / 5 is the change

b = 1960 / 10 is the change

c = 1950 / 20 is the change

They are all increasing i'd assume they all went threw a positive change

Suppose an arrow is shot upward on the moon with a velocity of 45 m/s, then its height in meters

after t seconds is given by h(t) = 45t – 0. 83t^2. Find the average velocity over the given time

intervals.

[4, 5]:

[4, 4. 5]

[4, 4. 1]:

[4, 4. 01];

[4, 4. 001]:

Answers

The average velocity over the given time intervals:

[4, 5] = 37.53 m/s

[4, 4.5] = 37.945 m/s

[4, 4.1] = 38.277 m/s

[4, 4.01] = 38.36 m/s

[4, 4.001] = 38.4 m/s

Speed is the ratio of the displacement of an object to the time it has traveled. Speed is a vector quantity with units such as km/hour, m/minute, m/second, and others.

The speed formula is v = S/t, with the following description.

v is velocity/speed (m/s).

S is the distance/displacement (m).

t is the time(s).

The distance (s) can be calculated using the formula S = v x t, the formula for time is t = S/v, which is distance divided by speed. While the average speed is defined as the displacement traveled within a certain time interval.

The average velocity formula can be written like this v = ∆x / ∆t with the following information.

v is the average speed (m/s-1).

∆x is the final-initial displacement (m).

∆t is the change in the end-start time (seconds)

From the formula above we can calculate the average speed.

time intervals.

h(t) = 45t – 0. 83t²

a. [4, 5]

v = ∆h / ∆t

$=\frac{h_2-h_1}{t_2-t_1}$

$=\frac{(45\times 5-0.83(5)^2)-(45\times 4-0.83(4)^2)}{5-4}$

$=\frac{(225-20.75)-(180-13.28)}{1}$

= 204.25 - 166.72

= 37.53 m/s

b. [4, 4.5]

v = ∆h / ∆t

$=\frac{h_2-h_1}{t_2-t_1}$

$=\frac{(45\times 4.5-0.83(4.5)^2)-(45\times 4-0.83(4)^2)}{4.5-4}$

$=\frac{(202.5-16.8075)-(180-13.28)}{0.5}$

$=\frac{185.6925-166.72}{0.5}$

$=\frac{18.9725}{0.5}$

= 37.945 m/s

c. [4, 4.1]

v = ∆h / ∆t

$=\frac{h_2-h_1}{t_2-t_1}$

$=\frac{(45\times 4.1-0.83(4.1)^2)-(45\times 4-0.83(4)^2)}{4.1-4}$

$=\frac{(184.5-13.9523)-(180-13.28)}{0.1}$

$=\frac{170.5477-166.72}{0.1}$

$=\frac{3.8277}{0.1}$

= 38.277 m/s

d. [4, 4.01]

v = ∆h / ∆t

$=\frac{h_2-h_1}{t_2-t_1}$

$=\frac{(45\times 4.01-0.83(4.01)^2)-(45\times 4-0.83(4)^2)}{4.01-4}$

$=\frac{(180.45-13.3464)-(180-13.28)}{0.01}$

$=\frac{167.1036-166.72}{0.01}$

$=\frac{0.3836}{0.01}$

= 38.36 m/s

e. [4, 4.001]

v = ∆h / ∆t

$=\frac{h_2-h_1}{t_2-t_1}$

$=\frac{(45\times 4.001-0.83(4.001)^2)-(45\times 4-0.83(4)^2)}{4.001-4}$

$=\frac{(180.045-13.2866)-(180-13.28)}{0.001}$

$=\frac{166.7584-166.72}{0.001}$

$=\frac{0.0384}{0.001}$

= 38.4 m/s

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Sort the array [7,5, 3, 9, 8, 4, 6, 2] in the ascending order by applying the quick sort algorithm. Let's just choose the left most value as the pivot. Write down the intermediate results step by step, including the position of pivot, left and right index, and the content of the array after each partition. 0 1 2 3 4 5 6 7 1 7 5 3 9 8 4 6 2

Answers

The quick sort algorithm involves multiple recursive steps, but in this case, the array is already sorted after the second partition, so no further steps are needed.

To sort the given array [7, 5, 3, 9, 8, 4, 6, 2] in ascending order using the quick sort algorithm, we'll choose the leftmost value as the pivot. Let's go through the steps of the quick sort algorithm and track the intermediate results:

Step 1:

Initial array: [7, 5, 3, 9, 8, 4, 6, 2]

Pivot value: 7

Left index: 1

Right index: 7

Step 2:

Partitioning the array:

Start from the left index (1) and move towards the right until finding a value greater than the pivot (7). Found 9 at index 3.

Start from the right index (7) and move towards the left until finding a value smaller than the pivot (7). Found 2 at index 7.

Swap the values at index 3 and 7: [7, 5, 3, 2, 8, 4, 6, 9]

Step 3:

Partitioned array: [7, 5, 3, 2, 8, 4, 6, 9]

New pivot value: 7

New left index: 1

New right index: 3

Step 4:

Partitioning the array:

Start from the left index (1) and move towards the right until finding a value greater than the pivot (7). No value found.

Start from the right index (3) and move towards the left until finding a value smaller than the pivot (7). Found 2 at index 3.

Swap the values at index 3 and 2: [7, 5, 2, 3, 8, 4, 6, 9]

Step 5:

Partitioned array: [7, 5, 2, 3, 8, 4, 6, 9]

New pivot value: 7

New left index: 1

New right index: 2

Step 6:

Partitioning the array:

Start from the left index (1) and move towards the right until finding a value greater than the pivot (7). No value found.

Start from the right index (2) and move towards the left until finding a value smaller than the pivot (7). No value found.

Since there are no values greater or smaller than the pivot in this partition, we stop and consider this partition as sorted.

Final sorted array: [2, 3, 5, 4, 6, 7, 8, 9]

The intermediate results after each partition are as follows:

[7, 5, 3, 2, 8, 4, 6, 9]

[7, 5, 2, 3, 8, 4, 6, 9]

[2, 3, 5, 4, 6, 7, 8, 9]

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A t-bill with face value $10,000 and 87 days to maturity is selling at a bank discount ask yield of 3. 4%.

Answers

The bank discount ask yield on a Treasury bill with a face value of $10,000 and 87 days to maturity is 3.4%.

Treasury bills are short-term debt instruments issued by the government to raise funds. They are sold at a discount to their face value and mature at par. The bank discount yield is the annualized rate of return based on the discount price and face value. To calculate the yield, we use the formula:

Bank Discount Yield = (Discount / Face Value) * (360 / Days to Maturity)

In this case, the discount is the difference between the face value and the price at which the T-bill is selling. Let's assume the price is P. The discount is then calculated as: Discount = Face Value - P.

Substituting the given values, we have: Discount = $10,000 - P.

The bank discount yield is 3.4%, which means:

0.034 = (Discount / $10,000) * (360 / 87)

Solving for Discount, we find Discount ≈ $139.08.

Substituting this value back into the Discount formula, we can find the price P ≈ $9,860.92.

Therefore, the T-bill is selling at a price of approximately $9,860.92, and the bank discount ask yield is 3.4%.

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I'm in desperate need on how to solve

Answers

Seeing how there both equal 25x-14 = 20x+11 is the equation and x = 5 which means both sides are 111 degrees

Answer:

x = 5; m<1 = 69

Step-by-step explanation:

We know that the two angles with degrees 20x+11 and 25x-14 are vertical angles and are thus congruent or equal. Therefore, we can set the two angles equal to each other to find x:

$20x+11=25x-14\\20x+25=25x\\25=5x\\5=x$

If we plug in x into any of the two angles, we find the measure of both angles is 111.

The most probable relationship between angle 1 and the other two angles is supplementary, which means that the measure of angle 1 and any of the two angles beside it is 180.

To find m<1, represented as x, we can use the equation:

$180=20(5)+11+x\\180=111+x\\69=x$

In AMNO, the measure of angle O=90^ the measure of angle N=39^ , and MN = 3 feet. Find length of NO to the nearest tenth of a foot.

Answers

Answer:

Step-by-step explanation:

Answer:

Step-by-step explanation:

Answer = 2.3

(2) Given f(x) = x37x2+14x-6, solve the following problems.
(a) Verify that f(x) = x³-7x² + 14r 6 has a root in [2.5, 3.2]. (b) Use the bisection method to find p3 for f(x) on [2.5, 3.2] by hand calculation (i.e., do not use code and do not check stopping criteria). Do your work with at least 6 decimal digits if a number has more than 6 digits.
(c) Apply the bisection method to find approximate root of f(x) with € = 10-6 in [2.5, 3.2] by using the code "alg021 Bisection.m". Turn in a copy of the "command window" including all input and output.
(d) Find a bound for the number of iterations needed to achieve an approximation with accuracy € = 10-6 to the root of f(x) in [2.5, 3.2]. (Use the result obtained in Theorem 2.1.3 on p. 29 in lecture notes or Theorem 1 on p. 18 in slides of Ch. 2.) Is such bound consistent with the number of iterations needed when executing the code done in part (c)?

Answers

To verify if f(x) = x³ - 7x² + 14x - 6 has a root in [2.5, 3.2], we can check the sign changes of f(x) at the endpoints of bisection the interval.

f(2.5) = (2.5)³ - 7(2.5)² + 14(2.5) - 6 ≈ -1.375

f(3.2) = (3.2)³ - 7(3.2)² + 14(3.2) - 6 ≈ 8.288

Since f(2.5) is negative and f(3.2) is positive, there is a sign change, indicating that f(x) has a root in the interval [2.5, 3.2]. Using the bisection method, we can find p3 for f(x) on [2.5, 3.2] by iteratively bisecting the interval and checking the sign change of f(x) at each iteration .First iteration: a1 = 2.5, b1 = 3.2

p1 = (a1 + b1) / 2 = (2.5 + 3.2) / 2 ≈ 2.85

f(p1) = f(2.85) ≈ 2.424 Since f(p1) is positive, the root is in the interval [2.5, 2.85]. So, we update:

a2 = 2.5, b2 = 2.85

Second iteration:

p2 = (a2 + b2) / 2 = (2.5 + 2.85) / 2 ≈ 2.675

f(p2) = f(2.675) ≈ 0.175

Since f(p2) is positive, the root is in the interval [2.5, 2.675]. So, we update:

a3 = 2.5, b3 = 2.675

Third iteration:

p3 = (a3 + b3) / 2 = (2.5 + 2.675) / 2 ≈ 2.5875

f(p3) = f(2.5875) ≈ -0.569

Since f(p3) is negative, the root is in the interval [2.5875, 2.675]. So, we update:

a4 = 2.5875, b4 = 2.675

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1) The points (-2,5) and (2,3) lie on the same line. Write the equation of the line in slope-intercept form. Type your answer in as y=mx+b.

2) The slope of a line is -12, and the line passes througin the point (0,8). Write the equation for the line in slope intercept form. Type your answer in as y=mx+b.

Answers

Answer:

1) The equation of the line is y = $\frac{-1}{2}$ x + 4

2) The equation of the line is y = -12x + 8

Step-by-step explanation:

The slope-intercept form of the linear equation is y = m x + b, where

m is the slope of the line, m = Δy/Δx (chang of y/change of x)b is the y-intercept (value y at x = 0)

Let us solve the two questions

∵ points (-2, 5) and (2, 3) lie on the same line

→ Find the slope m

∵ Δ x = 2 - (-2) = 2 + 2 = 4

∵ Δ y = 3 - 5 = -2

∴ m = $\frac{-2}{4}=\frac{-1}{2}$

∴ The slope of the line is $\frac{-1}{2}$

→ Substitute the value of m in the form of the equation above

∴ y = $\frac{-1}{2}$ x + b

→ To find b substitute the x and y in the equation by the coordinates

of a point on the line

∵ Point (-2, 5) lies on the line

∴ x = -2 and y = 5

∵ 5 = $\frac{-1}{2}$(-2) + b

∴ 5 = 1 + b

- Subtract 1 from both sides

∴ 5 - 1 = 1 - 1 + b

∴ 4 = b

→ Sustitute it in the equation

∴ y = $\frac{-1}{2}$ x + 4

The equation of the line is y = $\frac{-1}{2}$ x + 4

∵ The slope of the line is -12

∴ m = -12

∵ The line passes through point (0, 8)

∵ b is the value of y at x = 0

∴ b = 8

→ Substitute the values of m and b in the form of the equation above

∴ y = -12x + 8

The equation of the line is y = -12x + 8

how do you graph the equation y=|x|?

Answers

graph looks like the letter v

2 around x means no matter what value x is y will be positive

plot points would be

(-2,2) (-1,1) (0,0) (1,1) (2,2)

alegbra 2 pls help ill give brainliest

Answers

Answer:

it's 1/a3b2 it's C basically

Step-by-step explanation:

I don't know what's equivalent to it but ik the answer

1. Honors Geometry 9th Grade PLS HELP WILL MARK BRAINLIST.

Answers

Answer:

Measure of angle E is 37 degrees because the triangles are similar and angle c and angle e are the ones that match up.

2x+4=6 is the equation

2x+4=6

2x=2

x=1

past data suggest that the score increase has astandard deviation of about 50 points. how large a sample of high school students would be needed to estimate the mean change in sat score to within 2 points with 95% confidence

Answers

382 students

To estimate the mean change in SAT scores to within 2 points with 95% confidence, you would need a sample of at least 382 high school students. This is because the margin of error (2 points) must be smaller than the standard deviation (50 points). Thus, we use the formula margin of error = (z-score) x (standard deviation/√n), where n is the sample size, to calculate the required sample size. Solving for n yields 382 students.

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Can someone answer this correctly please and thank you :D

Answers

I think it's C because there 6 digits after 5

Consider the decay function d (x) = 850(0.94)*. Describe the characteristics of the functions by using the drag
and drop feature. Find the domain, y intercept, decay rate, range, asymptote, decay factor. Thank youu

Answers

The characteristics of the function are:

The domain of the function is $(-\infty, \infty)$.The range of the function is $(0, \infty)$.The horizontal asymptote is y = 0The y-intercept is 850The decay rate is 0.06The decay factor is 0.94

How to calculate the domain of the function

The function is given as:

$d(x) =850(0.94)^x$

The function is an exponential function, and the domain of exponential functions are all set of real numbers.

Hence, the domain of the function is $(-\infty, \infty)$.

How to calculate the range of the function

The range of exponential functions is real numbers greater than 0

Hence, the range of the function is $(0, \infty)$.

How to calculate the horizontal asymptote

The horizontal of all exponential functions is y = 0

How to calculate the y-intercept

We have:

$d(x) =850(0.94)^x$

Set x = 0

$d(0) =850(0.94)^0$

$d(0) =850$

Hence, the y-intercept is 850

How to calculate the decay rate and the decay factor

The function is given as:

$d(x) =850(0.94)^x$

An exponential function is represented as:

$y =ab^x$

Where:

b represents the decay factor, and

$b = 1 - r$

Where r represents the decay rate

So, we have:

$b = 0.94$

Also,

$0.94 = 1 - r$

Solve for r

$r =0.06$

Hence, the decay rate is 0.06 and the decay factor is 0.94

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Which expression can be
used to find the value of
8 x (16 4 2)

Answers

Answer:

$8*16 = 128\\ or\\ 8*4 = 32\\ lastly,\\ 8 x 2 = 16$

these are the 3 ways to find the value of a multi-number parenthesis expression. Remember your PEMDAS.

PEMDAS Meaning

Parentheses

Exponents

Multiplication

Division

Addition

Subtraction

-2k-(-5)+1 combine like terms to create an equivalent expression

Answers

The resulting equivalent expression is -2k + 6

Equivalent expression.

Equivalent expression means an expressions that work the same even though they look different. If we said the two algebraic expressions are equivalent, then the two expressions have the same value when we plug in the same value(s) for the variable(s).

Given,

Here we have the expression -2k - (-5) + 1

Now, we have to combine the like terms and then we have to solve it in order to find the equivalent expression.

First, we have to write the given expression,

=> -2k - (-5) + 1

Here we know that (-) x (-) = (+), therefore, the given expression is rewritten as follows:

=> -2k + 5 + 1

Here the only like term is the constant 5 and 1, so, we have to combine these constant, the we get the expression like the following;

=> -2k + (5 + 1)

No, we have to add the constant in order to get the equivalent expression,

=> - 2k + 6

Therefore, the equivalent expression i s -2k + 6.

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Find the vectors u
and v
whose initial and terminal points are given.
u
:
(
0
,
0
)
,
(
6
,
−
2
)
v
:
(
2
,
7
)
,
(
9
,
5
)
.
Are u
and v
equivalent?

Answers

No, the vectors u and v are not equivalent. The vectors u and v are considered equivalent if they have the same magnitude and direction. To determine if u and v are equivalent, we need to compare their magnitudes and directions.

The magnitude of a vector can be found using the distance formula: ||v|| = √((x2 - x1)^2 + (y2 - y1)^2), where (x1, y1) and (x2, y2) are the initial and terminal points of the vector, respectively.

For vector u, the magnitude is ||u|| = √((6 - 0)^2 + (-2 - 0)^2) = √(6^2 + (-2)^2) = √40 = 2√10.

For vector v, the magnitude is ||v|| = √((9 - 2)^2 + (5 - 7)^2) = √(7^2 + (-2)^2) = √53.

Since ||u|| ≠ ||v|| (2√10 ≠ √53), the magnitudes of u and v are not equal, indicating that the vectors are not equivalent.

Furthermore, the directions of the vectors u and v can also be compared by looking at their slopes. However, even if the magnitudes were equal, the difference in slopes would still make the vectors non-equivalent. Therefore, based on both magnitude and direction, we can conclude that u and v are not equivalent.

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Identify the key features of the parabola that is formed by the equation
f(x)=-4.9x^(2)+19.8x+58
Round your answers to the nearest whole number.
what its the x-intercepts

Answers

Parabolas are used to represent quadratic functions

The x-intercepts of the parabola are -1.969 and 6.01

How to identify the key features

The function is given as:

$f(x) = 4.9x^2 + 19.8x + 58$

Next, we plot the graph of the function f(x)

From the graph (see attachment), we have the following features

Vertex = (2.02, 78.002)Line of symmetry, x = 2.02x-intercepts = -1.969 and 6.01

Hence, the x-intercepts of the parabola are -1.969 and 6.01

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In an experiment on a damped spring oscillator with spring constant n/m, student c obtains the displacement vs time curves as in fig. 2(a), and records the maximum displacement data points as below is y = - 3.7148.

Here we have to find the displacement for the graphs of y and t that is maximum and We can find that by y = mc where m, = slope, c= intercept.

Slope = m= - 0.737414.intercept = c= - 3.714855.In experiment on a damped spring oscillator with spring constant n/m, student c obtains the displacement vs time curves. by y = m+c = - 0.737414 + - 3.714855 = - 3.7148.Thus the displacement= - 3.7148

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As the number of workers increases, the number of days it will take to complete the project decreases. option A.

The product of the two variables is constant. option B

The number of days it takes for a construction project to be completed varies inversely as the number of workers assigned to the project. option B.

What is the relationship between the tables?

Relationship 1

Workers : No. of days = 2 : 42

= 1 : 21

Relationship 2:

Workers : No. of days = 3 : 28

= 1 : 9⅓

Relationship 3:

Workers : No. of days = 6 : 14

= 1 : 2 ⅓

2 × 42 = 84

3 × 28 = 84

6 × 14 = 84

12 × 7 = 84

Hence, the relationship between the two variables are inversely proportional because as one variable increases, another decreases.

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Answer:it's

Step-by-step explanation:

Select the equation that shows a proportional relationship between x and y. Oy - 2x + 4 oys 5x O y = 3x - 5 OY-5.8

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Given:

There exist a proportional relationship between x and y.

To find:

The equation which represents a proportional relationship between x and y.

Solution:

If there exist a proportional relationship between x and y, then

where, k is constant of proportionality.

We know that, proportional relationship passes through the origin because (0,0) satisfy .

For x=0, check which equation has y=0.

In option A, .

In option B, .

In option C, .

In option D,

Only in option C, we have a equation of the form with 4 as constant of proportionality and it passes through (0,0).

Therefore, the correct option is C.

Answer:

You can give China brainiest.

Step-by-step explanation:

The average salary in this city is 544,000. Is the average less for single people? 57 randomly selected single people who were surveyed had an average salary of $42.581 and a standard deviation of 56,280. What can be concluded at the a-0.01 level of significance? For this study, we should use ___

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As the upper bound of the 99% confidence interval is below $54,500, there is enough evidence that the average is for single people.

What is a t-distribution confidence interval?

The t-distribution is used when the standard deviation for the population is not known, and the bounds of the confidence interval are given according to the equation presented as follows:

$\overline{x} \pm t\frac{s}{\sqrt{n}}$

The variables of the equation are listed as follows:

$\overline{x}$ is the sample mean.t is the critical value.n is the sample size.s is the standard deviation for the sample.

The critical value, using a t-distribution calculator, for a two-tailed 99% confidence interval, with 57 - 1 = 56 df, is t = 2.6665.

The parameters for this problem are given as follows:

$\overline{x} = 425810, s = 5628, n = 57$

The upper bound of the interval is given as follows:

$42581 + 2.6665 \times \frac{5628}{\sqrt{57}} = 44568.73$

More can be learned about the t-distribution at https://brainly.com/question/17469144

#SPJ4

THIS IS VERY NEEDED! I AM VERY CONFUSED AND I HAVE A TEST PLEASE HELP ME! I WILL GIVE BRAINLIEST AND 20 POINTS IS OFFERED!

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Answer:

the answer is -6.8°

Step-by-step explanation:

-36°+-25°+12°+-3°+18°/5°

-34°÷5°=-6.8°

Make as Braniliest!

As seen in the diagram below, Isaac is building a walkway with a width of
x feet to go around a swimming pool that measures 12 feet by 8 feet. If the total area of the pool and the walkway will be 396 square feet, how wide should the walkway be?

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By calculations, the width of the walkway should be 5 feet

How to determine how wide the walkway should be?

From the question, we have the following parameters that can be used in our computation:

Dimension = 12 feet by 8 feet

Area of the walkway = 396 feet

The missing diagram is attached

This means that

Area = (12 + 2x) * (8 + 2x)

Recall that

Area of the walkway = 396 feet

So, we have

(12 + 2x) * (8 + 2x) = 396

When solved using a graphing tool, we have

x = 5

Hence, the width of the walkway should be 5 feet

PLEASE HELP.!! ILL GIVE BRAINLIEST *EXTRA POINTS* DONT SKIP.!! :((

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PLEASE HELP.!! ILL GIVE BRAINLIEST EXTRA POINTS DONT SKIP.!! :((