I need help to identify angle 2 please

Answer:

$55

Step-by-step explanation:

Let c = cost of labour per hour

1) Set up an equation, where hours is denoted by c.

5.5c + 59 = 361.50

5.5c = 361.50 - 59

5.5c = 302.50

c = 302.50/5.5

c = 55

Therefore, the technician took $55 per hour.

The circumcenter of the triangle is (-3, -4), units.

The circumcenter is the intersection point of the perpendicular bisectors of sides of a triangle. It is the Centre of a triangle's circumcircle.

For a right-angled triangle, the circumcenter lies on the hypotenuse.

The middle of the horizontal length of the triangle = - 3

The  middle of the vertical length of the triangle = - 4

The circumcenter of the triangle is located at (x, y ) = ( -3, -4 )

Thus, the circumcenter of the triangle is determined from the interception point of the horizontal length and vertical length.

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(1) it takes about 10 hours to thaw a 20-pound turkey in cold water.(2) it takes an additional 0.25 hours (or 15 minutes) to thaw in the refrigerator.

A linear function is a function that represents a straight line in the coordinate plane. For example, y = 3x - 2 represents a straight line in the coordinate plane and thus a linear function. Since y can be replaced by the function f(x), this function can be written as f(x) = 3x - 2.

 a. A typical thawing rate when thawing in the refrigerator  is about 1 day per 4-5 kilograms of turkey meat. So if you have a 20 pound turkey, it will take about 4-5 days to thaw in the fridge. In cold water, the thawing rate  is about 30 minutes per pound, so it takes about 10 hours to thaw a 20-pound turkey in cold water.

b) The initial value may represent the weight of the frozen turkey before thawing begins. c. Let y be the time it takes to thaw the turkey in hours and let x be the weight of the turkey in pounds. Assuming a linear relationship between melting time and weight, we can write:

y = mx + b

where m is the thaw rate (in hours per pound) and b is the intercept (the time it takes to thaw a 0-pound turkey, which is 0). From part a, we know that the refrigerator thaw rate  is about 1 day per 4-5 pounds of turkey, or about 0.25-0.2 hours per pound. So we can use m = 0.25 in our linear function:

y = 0.25x + 0

This means that for every additional pound of turkey, it takes an additional 0.25 hours (or 15 minutes) to thaw in the refrigerator.

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Answer:

2 3/5 x 3 1/3 = 26/3 = 8 2/3

Answer:

The 12th term would be 29

Step-by-step explanation:

First find the Algebraic expression:-

Xn = dn + b

'd' means common difference, which is 2 in this sequence.

'b' means 'first term- d'

So, b = 7 - 2

b = 5

Xn = 2n + 5

Now, to find the 12th term, substitute 12 in the place of 'n':-

2 x 12 + 5

29 is the 12th term!

Answer:

pls help me as well

Step-by-step explanation:

btw which school do u study in?

the only statement that is definitely true based on the given ratio is (B) 2/7 of the medals are bronze.

Based on the given ratio of gold to silver to bronze medals being 2:3:2, we can deduce the following:

(A) Italy got a total of 7 medals: This statement cannot be determined based solely on the given ratio. The total number of medals received by Italy is not explicitly provided.

(B) 2/7 of the medals are bronze: This statement is true. Since the ratio of bronze medals to the total medals is 2/(2+3+2) = 2/7, it means that 2/7 of the medals are bronze.

(C) 40% of the total medals are gold: This statement is false. The ratio given does not indicate that 40% of the medals are gold. Without knowing the total number of medals, we cannot determine the percentage.

(D) More than half of the medals are silver: This statement is false. The given ratio indicates that the number of silver medals is less than the combined number of gold and bronze medals, which means that less than half of the medals are silver.

In summary, the only statement that is definitely true based on the given ratio is (B) 2/7 of the medals are bronze.

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Answer:

60n seconds

Step-by-step explanation:

In 1 min, there are 60 seconds

So,

1 min = 60 secs

For n minutes, it becomes:

=> 60n seconds

Answer:

4.6257

4.6285

4.632

Step-by-step explanation:

Answer: 100

Step-by-step explanation:

Because 88.9% of the data falls between approximately 47.62 and Blank.

Train a total of 200 miles each week. 160 miles I bike, 32 miles I run, 8 miles I swim.

What do you mean by Simultaneous linear equations?

A system of simultaneous linear equations is any pair of linear equations or more that have the same unknown variables in common. To solve such a system, one must identify values for the unknown variables that simultaneously satisfy each of the equations. A system of simultaneous linear equations is any pair or group of linear equations where each equation has the same unknown variables. Finding values for the unknown variables that simultaneously satisfy each equation in such a system is the first step in its solution.

according to the question,

you bike five times as far as I run and you run four times as far as iswim. you train a total of 200 miles each week.

let, I swim x miles then I run 4x times and I bike 20x miles.

so, 4x+x+20x=200

by solving linear equations,

we get, x=8

hence,160 miles I bike.

32 miles I run.

8 miles I swim.

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Answer:

 \(\frac{x-7}{4} =f^{-1}( x)\)

Step-by-step explanation:

→ Replace f(x) with y

y = 4x + 7

→ Minus 7 from both sides

y - 7 = 4x

→ Divide both sides by 4

\(\frac{y-7}{4} =x\)

→ Replace y's with f⁻¹(x)

\(\frac{x-7}{4} =f^{-1}( x)\)

Answer:

5,000

Step-by-step explanation:

Solve using a weighted average like so:

{ (6 days)($34,000) + (4 days)($45,000) }/(6 days + 4 days) = $38,400

It doesn't appear as if the correct answer is listed in the choices? You can tell from the information given that the answer must be between $34,000 & $45,000!

Answer:

241/84

Step-by-step explanation:

Answer:

Tallahassee

Step-by-step explanation:

Answer:

-1

Step-by-step explanation:

4u-5v=23

-2(2u+4v=16) We multiply by -2 here to destroy u's.

4u-5v=23

-4u-8v=16 we addition both processes

-13v=39 so, v=-3

4u-5(-3)=23, 4u=8 so, u=2

u+v= -3+2= -1

Answer:

Step-by-step explanation:

x² = 8² + 1²

x² = 64 + 1

x² = 65

x = √65

or

x = 8.06

To determine the amount the player should win in a fair game, we need to calculate the probability of winning and then find the appropriate amount to be won.

First, let's consider the possible outcomes:

1. The game is lost if the first roll results in an odd number (3 possibilities: 1, 3, 5).

2. The game is won if the first roll results in an even number, and the second roll matches the first (3 possibilities: 2, 4, 6).

The probability of winning can be calculated as the probability of the second roll matching the first, which is 1/6 since there are six equally likely outcomes for each roll.

To make the game fair, the expected value of the winnings should be zero. In this case, the player loses the amount paid to play the game if they lose, and they win an unknown amount if they win. Since the probability of winning is 1/6, the amount won should be 6 times the amount paid to play the game.

Therefore, in a fair game, the player should win 6 times the amount paid to play.

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To fit a linear function of the form f(t) = c0 +c1t to the given data points using least squares, we need to minimize the sum of squared errors between the predicted values of the function and the actual data points.

First, we need to calculate the slope (c1) and y-intercept (c0) of the linear function. We can do this using the following formulas:
c1 = (nΣxy - ΣxΣy) / (nΣx^2 - (Σx)^2)
c0 = (Σy - c1Σx) / n
where n is the number of data points, Σxy is the sum of the products of each x and y value, Σx and Σy are the sums of the x and y values, and Σx^2 is the sum of the squared x values.
Plugging in the values from the given data points, we get:
n = 3
Σxy = 15
Σx = 2
Σy = 12
Σx^2 = 3
c1 = (3*15 - 2*12) / (3*3 - 2^2) = 6/5
c0 = (12 - (6/5)*2) / 3 = 13/15
Therefore, the linear function that fits the given data points using least squares is:
f(t) = 13/15 + (6/5)t

To verify this, we can calculate the predicted values of the function for each data point and compare them to the actual values.
f(0) = 13/15 + (6/5)*0 = 13/15 ≈ 0.87
f(1) = 13/15 + (6/5)*1 = 19/15 ≈ 1.27
f(1) = 13/15 + (6/5)*1 = 19/15 ≈ 1.27
f(6) = 13/15 + (6/5)*6 = 49/5 ≈ 9.8
Comparing these values to the actual data points, we can see that the linear function provides a reasonable fit.

In summary, to fit a linear function of the form f(t) = c0 +c1t to given data points using least squares, we need to calculate the slope and y-intercept of the function using the formulas above. Then, we can verify the fit by comparing the predicted values to the actual data points. This linear function can then be used to make predictions for other values of t within the given range.

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The minimum that could be earned is $150. The required inequalities are solved below:

What is an inequality?

An inequality in mathematics is a relationship that makes a non-equal comparison between two integers or other mathematical expressions. It is most commonly used to compare the sizes of two numbers on a number line. There are multiple notations used to denote various types of inequalities: The symbol a b indicates that an is smaller than b. The symbol a > b indicates that an is more than b. In either scenario, a and b are not equal. These are characterized as stringent inequalities because an is either strictly less than or strictly bigger than b. Equivalence is not allowed.

(a) The minimum that could be earned is $150.

(b) The required inequality is given as 150+20x≥630

or, 20x≥630-150

or, x≥480/20

or, x≥24

(c) The required inequality is given as 150+20x≥750

or, 20x≥750-150

or, x≥600/20

or, x≥30

(d) The required inequality is given as 150+20x≤950

or, 20x≤950-150

or, x≤800/20

or, x≤40

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The function that has a restricted domain is \(k(x) = (-x+3)^1^/^2\)

The expression \((-x+3)^1^/^2\) involves taking the square root of (-x+3).

Since the square root is only defined for non-negative values, the domain of this function is restricted to values of x that make (-x+3) non-negative.

In other words, x must satisfy the inequality -x+3 ≥ 0.

Solving this inequality, we have:

-x + 3 ≥ 0

x ≤ 3

Therefore, the domain of k(x) is x ≤ 3, which means the function has a restricted domain.

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The number of verbs memorized after two hours (t = 120) is:y = 50 - 15(30/2)^(-1/30)(120)= 45.92. Therefore, the student will memorize about 45 verbs in two hours.

(a) A student studying a foreign language has 50 verbs to memorize. Suppose the rate at which the student can memorize these verbs is proportional to the number of verbs remaining to be memorized, 50 – y, where the student has memorized y verbs. Initially, no verbs have been memorized.

Suppose 20 verbs are memorized in the first 30 minutes.

For part a) we have to find how many verbs will the student memorize in two hours.

It can be seen that y (the number of verbs memorized) and t (the time elapsed) satisfy the differential equation:

dy/dt

= k(50 – y)where k is a constant of proportionality.

Since the time taken to memorize all the verbs is limited to two hours, we set t = 120 in minutes.

At t

= 30, y = 20 (verbs).

Then, 120 – 30

= 90 (minutes) and 50 – 20

= 30 (verbs).

We use separation of variables to solve the equation and integrate both sides:(1/(50 - y))dy

= k dt

Integrating both sides, we get;ln|50 - y|

= kt + C

Using the initial condition, t = 30 and y = 20, we get:

C = ln(50 - 20) - 30k

Solving for k, we get:

k = (1/30)ln(30/2)Using k, we integrate to find y as a function of t:

ln|50 - y|

= (1/30)ln(30/2)t + ln(15)50 - y

= e^(ln(15))e^((1/30)ln(30/2))t50 - y

= 15(30/2)^(-1/30)t

Therefore,

y = 50 - 15(30/2)^(-1/30)t

Hence, the number of verbs memorized after two hours (t = 120) is:y = 50 - 15(30/2)^(-1/30)(120)

= 45.92

Therefore, the student will memorize about 45 verbs in two hours.

(b) Now, we are supposed to determine after how many hours will the student have only one verb left to memorize.

For this part, we want y

= 1, so we solve the differential equation:

dy/dt

= k(50 – y)with y(0)

= 0 and y(t)

= 1

when t = T.

This gives: k

= (1/50)ln(50/49), so that dy/dt

= (1/50)ln(50/49)(50 – y)

Separating variables and integrating both sides, we get:

ln|50 – y|

= (1/50)ln(50/49)t + C

Using the initial condition

y(0) = 0, we get:

C = ln 50ln|50 – y|

= (1/50)ln(50/49)t + ln 50

Taking the exponential of both sides, we get:50 – y

= 50(49/50)^(t/50)y

= 50[1 – (49/50)^(t/50)]

When y = 1, we get:

1 = 50[1 – (49/50)^(t/50)](49/50)^(t/50)

= 49/50^(T/50)

Taking natural logarithms of both sides, we get:

t/50 = ln(49/50^(T/50))ln(49/50)T/50 '

= ln[ln(49/50)/ln(49/50^(T/50))]T

≈ 272.42

Thus, the student will have only one verb left to memorize after about 272.42 minutes, or 4 hours and 32.42 minutes (approximately).

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If the class has a mean (μ) of 60 and a standard deviation (σ) of 10, and your score is 65, then you would be above the mean but still within one standard deviation. In this case, the set of parameters μ = 60 and σ = 10 would likely give you a relatively good grade.

To determine which set of parameters would give you the best grade on the exam, we need to understand the grading scheme and how your score is compared to the rest of the class. Specifically, we need to know the mean (μ) and standard deviation (σ) of the exam scores for the entire class.

If the grading scheme involves a curve, where your score is compared to the mean and standard deviation of the class, then the set of parameters that would give you the best grade would depend on the distribution of scores in the class.

If the class has a mean (μ) of 60 and a standard deviation (σ) of 10, and your score is 65, then you would be above the mean but still within one standard deviation. In this case, the set of parameters μ = 60 and σ = 10 would likely give you a relatively good grade.

However, if the class has a different mean and standard deviation, or if the grading scheme does not involve a curve, then a different set of parameters might give you the best grade.

Without more specific information about the grading scheme and the distribution of scores in the class, it is difficult to determine the exact set of parameters that would result in the best grade for you.

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Answer:

third option

Step-by-step explanation:

the sum of x and y is 140 , that is

x + y = 140

the difference between x and y is 32 ( y is smaller ) , then

x - y = 32

the system to solve for x and y is

x + y = 140

x - y = 32

Answer:

3rd one trust me

12 ejrid the rude

Answer:opition C

g(-1)=1

Step-by-step explanation:

The mean time for bicycle repairs on the first day of the race was 4.25 hours, while on the second day it decreased to 3.5 hours.

Additionally, the mean absolute deviation increased from 0.5 hour on the first day to 0.75 hour on the second day.

The change in the mean time for bicycle repairs from the first to the second day of the race indicates a decrease in the average repair time. This suggests that the riders were able to make repairs more efficiently or encountered fewer mechanical issues on the second day compared to the first day.

The decrease in mean repair time could be attributed to various factors, such as better maintenance of bicycles, improved repair skills of the riders, or reduced incidence of mechanical failures.

The increase in the mean absolute deviation from 0.5 hour on the first day to 0.75 hour on the second day implies greater variability in the repair times. This means that on the second day, the repair times were more spread out from the mean compared to the first day. The increased mean absolute deviation could be due to a wider range of repair times experienced by different riders or more unpredictable repair situations encountered on the second day.

In summary, the change in the mean time for bicycle repairs indicates a decrease from the first to the second day of the race, suggesting improved efficiency or reduced mechanical issues. However, the increase in the mean absolute deviation implies greater variability in repair times on the second day, indicating a wider range of repair experiences or more unpredictable repair situations.

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Answer: The answer is c :

$0.95

Step-by-step explanation:

Answer:

they jumped

Step-by-step explanation:

They jump because they want to escape Mario and Javier. Paula is very nervous because there are many people, it is not possible to escape quickly

I hope I’m right if not I’m sorry

Step-by-step explanation:

In the second step while opening the bracket, instead of 'a', there should be - 4a.

Answer:

From Step 2 every step is wrong

Step-by-step explanation:

Ste p 1 : 3a - 5b = 12 - 4(b + a)

Step 2 : 3a - 5b = 12 - 4b - 4a      [ Last term instead - 4a she\he wrote + a ]

Step 3 : 7a  - 5b = 12 - 4b

Step 4 : 7a = 12 + b

\(Step 5 : a = \frac{12 + b}{7}\)