Cam someone help me do this? I don’t know what to divide and multiply

We are given the line

x - 5y = -4

We need to get this in slope intercept form

x-5y -x = -x-4

-5y = -x-4

Divide by -5

05y/-5 = -x/-5 -4/-5

y = 1/5x + 4/5

The slope oif this line is 1/5

We want to find a line that is parallel. Parallel lines have the same slope, so the new line will have a slope of 1/5

The new line contains the point(0,0)

Slope intercept form is y = mx+b where m is the slope and b is the y intercept

y = 1/5x + 0

y = 1/5x

(We know the y intercept is 0 since the point is (0,0) it crosses the y axis at 0)

Answer:

4x - 35

Step-by-step explanation:

this shows 35 less than the product of 4 and x

Answer:

35 less the product of 4 and x

\(4 \times x - 35 \\ = (4x - 35)\)

Given that ∠ADB and ∠BDC are complimentary angles, the numerical value of a, ∠ADB and ∠BDC are 5, 25° and 65° respectively.

When two angles have measures adding to up to 90 degrees, they are called complementary .

Given that;

For complimentary angles;

m∠ADB + m∠BDC = 90°

Plug in the given values and solve for a.

( 3a + 10 ) + 13a = 90

3a + 10 + 13a = 90

10 + 16a = 90

16a = 90 - 10

16a = 80

a = 80/16

a = 5

Now, find the measure of ∠ADB and ∠BDC.

m∠ADB = ( 3a + 10 ) = 3(5) + 10 = 15 + 10 = 25°

m∠BDC = 13a = 13( 5 ) = 65°

Given that ∠ADB and ∠BDC are complimentary angles, the numerical value of a, ∠ADB and ∠BDC are 5, 25° and 65° respectively.

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The amount of interest for the year was 3,770 cents, and the regular price of the electric drill that Pamela bought before the discount was 21,927 cents

Interest = P x R x T.

Where:

P = Principal amount (the beginning balance).

R = Interest rate

T = Number of time periods

In this case, we are given that;

Principal amount (P) = $580

Interest rate (R) = 6,5 %

Time = 1 year

Hence, The amount of the interest = 6,5% of $580

                                                     = 0.065 × $580

                                                     = $37.7

1 dollar = 100 cents

Hence, $37.7 = 37.7 × 100 cents equal to 3,770 cents

P = (1 – d) x

Where,

P = Price after discount

D = discount rate

X = regular price

In this case, we are given that:

P = $32.89

D = 85% = 0,85

Hence, the regular price:

P = (1 – D) x

32.89 = (1 – 0.85) X

32.89 = 0.15X

X = 32.89/0.15

X= 219.27

1 dollar = 100 cents

Hence, $219.27 = 219.27 × 100 cents equal to 21,927 cents

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When the process of observing or measuring yields results that consistently deviate in some way from the true value, this is known as observer/measurement bias. Because of the systematic mistake this adds into the data, the conclusions are incorrect or unreliable.

Observer/measurement bias is a sort of systematic error that happens when the technique used for observation or measurement yields results that consistently deviate in some way from the true value. The observer's own preconceived ideas or expectations, the measurement equipment, and the environment in which the observation or measurement is being conducted can all contribute to this form of bias.An observer's bias, for instance, could cause them to see or measure something in a way that favours one particular result or outcome over another. Similar to how external influences like noise, light, or temperature can skew results, the environment in which the observation or measurement is taking place may add a bias. If feasible, results that are inaccurate or unreliable because of observer/measurement bias should be avoided because they can lead to incorrect inferences about the data.

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Answer : a ) Variance = (21 - 6.5)^2/12 = 13.7708, b) 1, 21 <= x, c) Probability = 0.5862, D) Probability = 0.8552

The uniform distribution on the interval (6.5, 21) can be represented as U(6.5, 21).
(a) The mean and variance of a uniform distribution can be calculated using the following formulas:
Mean = (a + b)/2
Variance = (b - a)^2/12
where a and b are the lower and upper bounds of the distribution, respectively.
For the given distribution, a = 6.5 and b = 21.
Therefore, the mean and variance of depth are:
Mean = (6.5 + 21)/2 = 13.75
Variance = (21 - 6.5)^2/12 = 13.7708

(b) The cdf of a uniform distribution can be calculated using the following formula:
F(x) = (x - a)/(b - a)
For the given distribution, F(x) = (x - 6.5)/(21 - 6.5) for 6.5 <= x < 21.
Therefore, the cdf of depth is:
F(x) = {
0, x < 6.5
(x - 6.5)/14.5, 6.5 <= x < 21
1, 21 <= x

(c) The probability that observed depth is at most 10 can be calculated using the cdf:
P(X <= 10) = F(10) = (10 - 6.5)/14.5 = 0.2414
The probability that observed depth is between 10 and 15 can be calculated using the cdf:
P(10 <= X <= 15) = F(15) - F(10) = (15 - 6.5)/14.5 - (10 - 6.5)/14.5 = 0.5862

(d) The standard deviation of a uniform distribution can be calculated using the following formula:
Standard deviation = sqrt(Variance)

For the given distribution, the standard deviation is:
Standard deviation = sqrt(13.7708) = 3.7118
The probability that the observed depth is within 1 standard deviation of the mean value can be calculated using the cdf:
P(13.75 - 3.7118 <= X <= 13.75 + 3.7118) = F(13.75 + 3.7118) - F(13.75 - 3.7118) = (13.75 + 3.7118 - 6.5)/14.5 - (13.75 - 3.7118 - 6.5)/14.5 = 0.5118
The probability that the observed depth is within 2 standard deviations of the mean value can be calculated using the cdf:
P(13.75 - 2*3.7118 <= X <= 13.75 + 2*3.7118) = F(13.75 + 2*3.7118) - F(13.75 - 2*3.7118) = (13.75 + 2*3.7118 - 6.5)/14.5 - (13.75 - 2*3.7118 - 6.5)/14.5 = 0.8552

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Answer: This is because you want to find a quad root of it and the nunber would be 4/3 to do that

Step-by-step explanation: I am very busy

The perimeter of a Triangle is the sum of three sides ; ie assuming k,l,m be the three sides of a triangle means then k+l+m = perimeter of a triangle.

 here given that a two sides lengths are 2x+ 2 and 5x-4 ;

 and the perimeter length is 16x-6;

  let the unknown side be k;

  therefore k + 2x+2 + 5x-4 = 16x-6;

 resolving k + 7x-2 = 16x-6;

Ans:- k= 16x-6-7x+2 = 9x-4 ie the unknown length k is 9x-4

Answer:

3x2y(3x2−2xy+y2) So C

Step-by-step explanation:

not 9 the answer should be 3

Answer:

There is no mode !

Step-by-step explanation:

Hello,

what is the mode of a set of data?

It is the value in the set that occurs most often.

To note that this is also possible to have a set of data with no mode.

in this example, let's order them

7, 8, 11, 12, 13, 14, 15, 20

There is no repetition, right? each value occurs only once.

So, there is no mode!

hope this helps

Answer:

n = 5

Step-by-step explanation:

Coordinate of P = (n,3)

R is on y-axis & the y-coordinate of P & R are equal. So coordinate of R = (3,0)

Coordinate of Q = (n,-2)

Using distance formula,

Distance between P & Q =

\( \sqrt{ {( n - n}) ^{2} + {( 3- ( - 2) })^{2} } \)

\( = > \sqrt{ {(3 + 2)}^{2} } = \sqrt{ {5}^{2} } = 5\)

Distance between P & R =

\( \sqrt{ {(n - 0)}^{2} + {(3 - 3)}^{2} } \)

\( = > \sqrt{ {n}^{2} } = n\)

But in question it is given that distance between P & Q is equal to the distance between P & R. So,

\(n = 5\)

Answer:

63

Step-by-step explanation:

9 x 14 = 126/2 = 63

Answer:

7

Step-by-step explanation:

the mistake they made is not changing the 9r to a positive. A negative and a negative make it positive

Answer:

18

Step-by-step explanation:

X^2 - 7 =

Since we need to evaluate the expression when X = 5, we replace X with 5.

= 5^2 - 7

Now, according to the correct order of operations, we need to do the exponent first. 5^2 = 5 * 5 = 25

= 25 - 7

Finally, we subtract.

= 18

Answer: 18

Without using a calculator, the trigonometric expressions simplify to:

1. sin^(-1)(sin(θ/6)) = θ/6

2. cos^(-1)(cos(5/4)) = 5/4

3. tan^(-1)(tan(5/6)) = 5/6.

To compute the trigonometric expressions without using a calculator, we can make use of the properties and relationships between trigonometric functions.

1. sin^(-1)(sin(θ/6)):

Since sin^(-1)(sin(x)) = x for -π/2 ≤ x ≤ π/2, we have sin^(-1)(sin(θ/6)) = θ/6.

2. cos^(-1)(cos(5/4)):

Similarly, cos^(-1)(cos(x)) = x for 0 ≤ x ≤ π. Therefore, cos^(-1)(cos(5/4)) = 5/4.

3. tan^(-1)(tan(5/6)):

tan^(-1)(tan(x)) = x for -π/2 < x < π/2. Thus, tan^(-1)(tan(5/6)) = 5/6.

Hence, without using a calculator, we find that:

sin^(-1)(sin(θ/6)) = θ/6,

cos^(-1)(cos(5/4)) = 5/4,

tan^(-1)(tan(5/6)) = 5/6.

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Answer:

  AB, CD

Step-by-step explanation:

Skew lines do not lie in the same plane, and do not intersect. One such pair is AB and CD.

__

Additional comment

Any of the lines, and any of the lines that intersect its diagonally-opposite edge will be skew lines.

For example, the opposite edge to line BC is line EG. Lines that intersect EG are ED, EF, GA, GH. All of those four lines are skew with respect to line BC.

Answer:

c) 0.04 is the answer

I would be happy if you give brainliest

Answer: To find the percentage of people with an IQ score less than 117, we need to calculate the z-score first. The z-score measures how many standard deviations an individual score is from the mean in a normal distribution.

The z-score formula is given by:

z = (x - μ) / σ

Where:

Let's calculate the z-score:

Now, we need to find the percentage of people with a z-score less than 1.1333. We can look up this value in the standard normal distribution table (also known as the Z-table) or use statistical software/tools.

Using the Z-table, we find that the percentage of people with a z-score less than 1.1333 is approximately 0.8708, or 87.08% (rounded to the nearest hundredth).

Therefore, approximately 87.1% of people have an IQ score less than 117.

Answer: c) 12h + 3 = 45

Explanation:

Mavis charged $12 an hour to babysit, so her earnings for h hours would be 12h. She spent $3 on gas, which means her total earnings for the night would be 12h - 3. Finally, she deposited $45 into her account, so we can set up the equation as:

12h - 3 = 45

Solving for h:

12h = 48

h = 4

Therefore, Mavis babysat for 4 hours.

Step-by-step explanation:

Answer:

D. All whole numbers less than or equal to 31

Step-by-step explanation:

The x value in this situation is the number of years after 1970 and until 2001.

This means that the domain will be the number of years after 1970 and until 2001.

Since the situation calculates the value of land in years after 1970, the domain will start at 0. Since it is until 2001, which is 31 years after 1970, the domain will go up to 31.

So, the domain will include all whole numbers less than or equal to 31.

The correct answer is D. All whole numbers less than or equal to 31

The domain of the function is a real number from 1971 to 2001. Then the correct option is B.

Exponential notation is the form of mathematical shorthand which allows us to write complicated expressions more succinctly. An exponent is a number or letter is called the base. It indicates that the base is to raise to a certain power. X is the base and n is the power.

The value of a piece of land in a town is increasing every year.

Its value, in dollars, in t years after 1970 and until 2001 can be modeled by the function

\(\rm y = 31, 000(1.001) ^ t\)

Then the domain of the function will be

All real numbers are greater than or equal to 1971 and less than or equal to 2001.

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the equation for the hyperbola is \((x^2 / 702.25) - (y^2 / 2652) = 1.\)

The standard equation for a hyperbola with center at the origin is:
\((x^2 / a^2) - (y^2 / b^2) = 1\)

where:
a is the distance from the center to the vertex along the x-axis
b is the distance from the center to the co-vertex along the y-axis

To find the values of a and b, we can use the distance formula between the vertices and the foci:

a = 53‾‾‾√ / 2 = 26.5‾‾‾√
c = distance from the center to the focus = 53‾‾‾√ - 2 = 51.5‾‾‾√
\(b = \sqrt{(c^2 - a^2)} = √(51.5^\sqrt{2}} - 26.5^\sqrt{2}} ) = \sqrt{(2652) } = \sqrt[2]{(663)}\)
Thus, the equation for the hyperbola is:
\((x^2 / (26.5√)^2) - (y^2 / (2√(663))^2) = 1\)
Simplifying, we get:
\((x^2 / 702.25) - (y^2 / 2652) = 1\)

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Step-by-step explanation:

Hey there!!!

Here,

The midpoint of AB is M(-3,-3) and coordinates of A is (-8,-2).

Now,

Using midpoint formulae,

\((x,y) =( \frac{x1 + x2}{2} ,\frac{y1 + y2}{2} )\)

Put all values.

\(( - 3,- 3) = ( \frac{ - 8 + x}{2} , \frac{ - 2 + y}{2} )\)

As they are equal, equating with their corresponding elements we get,

\( - 3 = \frac{ - 8 + x}{2} \)

Simplify them.

\( - 6 = - 8 + x\)

\(x = - 6 + 8\)

Therefore, x= 2

Now,

\( - 3 = \frac{ - 2 + y}{2} \)

Simplify them.

\( - 6 = - 2 + y\)

\(y = - 6 + 2\)

Therefore, y = -4.

Therefore, the coordinates of B are (2,-4).

Hope it helps...

Area of 2 triangles = 2*(1/2)*6*8

= 48 square ft

Area of 1 rectangle = 10*5

= 50 square ft.

Area of 2nd rectangle = 5*6

= 30 square ft.

Area of 3rd rectangle = 5*8

= 40 square ft.

Surface area of figure = 40+30+50+48

= 168 square ft.

Therefore, the coefficient of variation of max{x1, x2, ..., x10} is 0.848.

To calculate the coefficient of variation of max{x1, x2, ... , x10}, we first need to find the mean and standard deviation of this random variable.

The probability that the maximum value is less than or equal to x is equal to the probability that each of the 10 variables is less than or equal to x. Since each variable is uniformly distributed on (0, 1), this probability is x^10.

Therefore, the cumulative distribution function (CDF) of the maximum variable is F(x) = x^10, for 0 < x < 1. Taking the derivative of the CDF, we get the probability density function (PDF) of the maximum variable:

f(x) = 10x^9

The mean of the maximum variable is given by:

E[max{x1, x2, ..., x10}] = ∫[0,1] x f(x) dx = ∫[0,1] 10x^10 dx = 1/11

To find the standard deviation, we need to calculate the second moment of the maximum variable:

E[(max{x1, x2, ..., x10})^2] = ∫[0,1] x^2 f(x) dx

Using integration by parts, we can evaluate this integral as:

E[(max{x1, x2, ..., x10})^2] = 10/132

Therefore, the variance of the maximum variable is:

Var[max{x1, x2, ..., x10}] = E[(max{x1, x2, ..., x10})^2] - (E[max{x1, x2, ..., x10}])^2 = 10/132 - (1/11)^2 = 879/14641

Finally, the coefficient of variation is the ratio of the standard deviation to the mean:

CV = sqrt(Var[max{x1, x2, ..., x10}]) / E[max{x1, x2, ..., x10}] = sqrt(879/14641) / (1/11) = 0.848

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Answer:

\(x=20; y=50\) or \((20, 50)\)

Step-by-step explanation:

Substitution means plugging in one variable's value that consists of the opposite variable. Because \(y=3x-10\) is already specified, you can plug it into the second equation's \(y\) value. After doing that, it looks like this:

\(-4x+2y=20→-4x+2(3x-10)=20\)

Then you would distribute the \(3\) across the parentheses next to it, like this:

\(-4x+2(3x-10)=20→-4x+6x-20=20\)

Then, add like terms, like this:

\(-4x+6x-20=20→2x=40\)

Then divide both side by \(2\) to isolate \(x\).

\(x=20\)

Now, you can plug \(20\) (\(x\)) into either equation, but the first one seems simpler so you would pick that. It would look like this:

\(y=3x-10→y=3(20)-10\)

Solving would look like this:

\(y=3(20)-10→y=60-10→y=50\)

So the answer is \(x=20; y=50\) or \((20, 50)\).

Answer:

the answer is 20, 50

Step-by-step explanation:

please give brainliest

Answer:

Hmm, remember to use distributive property with the fraction and the numbers in the parenthesis.

Step-by-step explanation:

Answer:

5:00 pm

Step-by-step explanation:

Given that:

Temperature at noon = 0°C

Average temperature drop rate = - 0.5°C per hour

What time would temperature be - 2.5°C

Hence, target temperature = - 2.5°C

Time taken for temperature to drop = (target temperature / temperature drop rate)

Time taken = - 2.5°C / - 0.5°C / hr

Time taken = 5 hours

Hence, the time at which temperature will be - 2.5°C equals 5 hours after noon

12: 00 noon + 5 hours = 5:00 pm

Hence, temperature will be - 2.5°C by 5:00 pm