A mathematics teacher wanted to see the correlation between test scores and homework. The homework grade (x) and test grade (y) are given in the accompanying table. Write the linear regression equation that represents this set of data, rounding all coefficients to the nearest tenth. Using this equation, find the projected test grade, to the nearest integer, for a student with a homework grade of 37.


Regression equation:

Final Answer:

Answer:

see below

Step-by-step explanation:

make x = 7

Answer:

Subtract 5 from both sides

x = 7

Step-by-step explanation:

x + 5 = 12  Subtract 5 from both sides

x + 5 - 5 = 12 - 5

x = 7

The equation that accurately represents the statement "negative 3 less than 4.9 times a number, x, is the same as 12.8" is:

4.9 x - 3 = 12.8

This equation can be gotten by replacing "negative 3 less than 4.9 times a number, x" with "4.9 x - 3" and "is the same as" with "=". The correct form of the equation is gotten by using the correct order of operations:

negative 3 less than 4.9 x

= 4.9 x - 3

= 12.8

The other equations listed do not accurately represent the statement. For example, the equation "Negative 3 minus 4.9 x = 12.8" would be incorrect because it does not use the correct order of operations. The correct order of operations would be to subtract 4.9 x from negative 3, which would give us 4.9 x - 3 = 12.8.

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The number of miles that a person walks at this speed to use at least 250 ​calories will be 2.49 miles.

The rate is the ratio of the amount of something to the unit. For example - If the speed of the car is 20 km/h it means the car travels 20 km in one hour.

A​ 150-pound person uses 6.7 calories per minute when walking at a speed of 4 mph.  If the number of calories burnt is 250. Then the number of minutes the person is given as,

T = 250 / 6.7

T = 37.313 minutes

T = 0.62 hours

Then the distance is given as,

D = 4 x 0.62

D = 2.49 miles

The number of miles that a person walks at this speed to use at least 250 ​calories will be 2.49 miles.

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Answer:

Step-by-step explanation:

The transformation of triangle QRS that results in an image triangle DEF where angle Q is congruent to angle D, angle R is congruent to angle E, and angle S is congruent to angle F, and QR/DE = QS/DF = RS/EF ≠ 1 is a similarity transformation.

A similarity transformation is a type of transformation that preserves the angles between the corresponding sides of the original and the image figures. It means that the corresponding angles of the two figures are congruent, and the ratios of the corresponding sides are equal. In the case of a triangle, it preserves the angles and the ratios of the sides.

So, if a transformation of triangle QRS results in an image triangle DEF where angle Q is congruent to angle D, angle R is congruent to angle E, and angle S is congruent to angle F, and QR/DE = QS/DF = RS/EF ≠ 1, it is a similarity transformation.

The transformation is similarity transformation.

Similarity transformations are transformations where there occurs a dilation with one or more transformations like rotation, reflection or translation.

This is called so because the triangles so formed will be similar triangles.

We need two triangles QRS and DEF to be similar triangles.

Similar triangles are those triangles which has the same shape but different size and the length of sides are proportional.

This is the required transformation here.

Similar triangles can be formed by transforming a triangle first with dilation.

Then you can do any of the other rigid transformations.

The triangles will be similar.

Hence the transformation here is similarity transformation.

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20-s is the number of pages written by Leo this week.

An expression is combination of variables, numbers and operators.

Given that Leo wrote s of his 20-page paper last week.

In last week she wrote s pages.

Leo completed his writing the paper this week.

20-s

Twenty minus s is the expression which gives the pages Leo write this week

Hence, 20-s is the number of pages written by Leo this week.

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Given the above function:

a) Note that the number of people that need to sign up for a tour in order for the profit to be at least $108 is:

b) The number of people that need to sign up for a tour in order for the profit to be more than $144 is:

c) Yes, it is possible to make a negative profit on the tour in which case they would have made a loss.

a) To find out the number of people that need to sign up for the profit to be at least $108 where the function y = - x7 + 24x, models profit in y,

we must equate the function to $108 and solve for x.

Thus:

- x7 + 24x = 108

resolve like terms

17x = 108

x = 108/17

x = 6.35294117647

x [tex]\approx[/tex] 6. 4

Plug x back into the formula, and we have:

-(6.4) * 7 + 24 (6.4) = 108.8 this shows that our calculation is correct. Since you can have 6.4 persons, the best number to aim for is 7.

b) The number of people that need to sign up for the project to turn a profit of $144 is:

- x7 + 24x = 144

resolve like terms

17x = 144

x = 144/17

x = 8.4705882353

Let's impute back 8.5 into the equation:

-(8.5)7 + 24(8.5)

= 144.5.

This shows that our calculation is correct. However since you cannot have 8.5 persons, the number to budget for would be 9 persons.

c) for the tour guide to lose money, the amount made, that is revenue, would have to be less than the amount invested.

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The example for the y-intercept, slope, two points, and the ordered pair

are given below.

In mathematics, a line's slope, also known as its gradient, is a numerical representation of the line's steepness and direction

Let a line in the slope-intercept form,

y = x + 1.

And the line passes through the two ordered pairs (3, 4) and (5, 6).

To find the slope;

m =  (y₂- y₁) / (x₂ - x₁)

m = 1

If a line passes through two points (x₁ ,y₁) and (x₂, y₂) ,

then the equation of line is

y - y₁ = (y₂- y₁) / (x₂ - x₁) x (x - x₁)

y - 4 = x -3

y = x+1

Substitute x = 0,

then y = 1

the y-intercept is 1.

Therefore, all the required values are given above.

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The constant of proportionality of the proportional relationship, given the values of x and y is D.  5 / 12

The ratio between two proportional quantities' constant values is known as the constant of proportionality. When either their ratio or their product gives a constant, two changing values are said to be in a proportionate relationship.

The Constant of proportionality can therefore be found by picking a random point on the graph which is ( 2, 5 / 6 )

The constant of proportionality is:

= 5 / 6 ÷ 2

= 5 / 6 x 1 / 2

= 5 / 12

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Answer:

Step-by-step explanation:Seriously you probably going to need a ruler because you don't like you can't just remember measurement inside your head you have to really like a ruler so actually go get a ruler and then take a picture of it doing with the ruler and then you might like get it.

The coefficients of the terms on the right side of a binomial equation are the numbers in Pascal's Triangle.

Pascal’s Triangle is a method to know the binomial coefficients of terms of binomial expression (x + y)n, where n can be any positive integer and x, and y are real numbers. Pascal's Triangle is represented in a triangular form, it is kind of a number pattern in the form of a triangular arrangement. It begins with 1 on the top and with 1 running down on the two sides of the triangle. In the pascal triangle, each new number is between two numbers and below them and its value is the sum of two numbers above. This triangle is used in different types of probability conditions. Here each row represents the coefficient of expansion of (x + y)ⁿ.

Properties of Pascal’s Triangle:

Therefore, the coefficients of the terms on the right side of a binomial equation are the numbers in Pascal's Triangle.

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The proportional parts in triangles and parallel lines can be found by similarity and ratios.

The ratio of any related side lengths is always the same when two triangles are similar. The scale factor can be used to identify the triangle's proportionate components. The longer side of one triangle is twice as long as the comparable side in the other. In contrast, the alternate interior angles are identical when two parallel lines are cut by a transverse line. Additionally, the matching angle pairs are all equal. Trigonometry can be used to determine the length of the opposite side of a pair of parallel lines if we know the length of one side and the matching angle.

One can use similarity ratios to determine the proportional components of triangles and parallel lines. Comparable geometries have equivalent sides that are in proportion. To get the missing side length, one can arrange ratios of corresponding sides and utilise cross-multiplication. Further, similar triangles can also be employed. When two triangles are comparable, their corresponding sides and angles are proportionate and equal.

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It will take Chantel approximately 2.028 hours or 122.68 minutes to complete the triathlon.

What is average ?

An average, also known as a mean, is a measure of central tendency that represents the typical value of a set of data. To calculate the average of a set of numbers, you add them up and then divide by the number of items in the set.

Time = Distance / Speed

For the swimming segment, the distance is 0.93 miles and the speed is 2.1 mph. So the time it will take Chantel to swim the 0.93 miles is:

Time = 0.93 / 2.1 = 0.445 hours or 26.7 minutes

For the biking segment, the distance is 24.8 miles and the speed is 18.2 mph. So the time it will take Chantel to bike the 24.8 miles is:

Time = 24.8 / 18.2 = 1.367 hours or 81.02 minutes

For the running segment, the distance is 6.2 miles and the speed is 5.1 mph. So the time it will take Chantel to run the 6.2 miles is:

Time = 6.2 / 5.1 = 1.216 hours or 72.96 minutes

To get the total time, you have to add the time for each segment:

Total time = 0.445 + 1.367 + 1.216 = 2.028 hours or 122.68 minutes

So , It will take Chantel approximately 2.028 hours or 122.68 minutes to complete the triathlon.

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Answer: Let "t" be the fare of the train.

The fare of the bus is "b".

We know that t + b = 4000 (the total fare of the journey)

On the return trip, the fare of the bus was hiked by half of what was paid, so b*1.5 = b + (b/2) = new fare of the bus.

The total fare of the return journey is 4800, so t + (b + (b/2)) = 4800

Now we have two equations:

t + b = 4000

t + b + (b/2) = 4800

We can substitute the first equation into the second equation:

t + b + (b/2) = 4800

t + (4000 - t) + (b/2) = 4800

t + (b/2) = 800

t = 800 - (b/2)

Now we have an equation that only involves one variable "t" (the fare of the train)

We can substitute the first equation back in:

t + b = 4000

800 - (b/2) + b = 4000

800 = (3/2)b

b = 1200

So the fare of the bus is 1200 and the fare of the train is 800

Step-by-step explanation:

Using the arithmetic operation of addition the total thickness of granola bar and yogurt collectively is 1130 inches.

What is arithmetic operation?

A subject of mathematics known as arithmetic operations deals with the study and use of numbers in all other branches of mathematics. Basic operations including addition, subtraction, multiplication, and division are included.

The thickness of granola bar is = 1116 inches

The thickness of layer of yogurt is = 14 inches

To find the total thickness use the formula -

Total Thickness = Thickness of granola bar + Thickness of yogurt

The arithmetic operation of addition is used to find the total thickness.

Substitute the values into the equation -

Total Thickness = 1116 + 14

Total Thickness = 1130

Therefore, the total thickness is obtained as 1130 inches.

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The number line which shows all the values of x that make the provided inequality -3x+1<7 true is shown in number line D.

Now, According to the question:

The number line is the way of representation of number and digits in a arranged form to understand the data batter.

The inequality is :

- 3x + 1 < 7

Subtract 1 both side of the equation and solve it further,

-3x + 1 - 1 < 7 - 1

-3x < 6

Divide with number 3,on both sides

-x < 6/3

-x < 2

Change the sign of the inequality by filliping the inequality sign,

x > -2

Here, the inequality is greater than the number negative 2. The value of x is greater than, thus, the arrow will point towards left and there will be open circle. This is shown in the option D.

Thus, the number line which shows all the values of x that make the provided inequality -3x+1<7 true is shown in number line D.

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The cost of each pen is $25. This can be solved using unitary method.

In the unitary technique, the value of a single unit is determined first, and then the value of the required number of units is determined.

When employing ratio and proportion to solve a problem, it is essential to comprehend the units and values.

To make things simpler, always place the known facts on the left and the things that need to be calculated on the right. The number of apples in the aforementioned situation is known, but it is unclear how much the fruit is worth on the market.

It should be stressed that the unitary technique applies the notions of ratio and proportion to problems.

Let the cost of each pen be x .

then according to the question, the cost of book will be x-10

now

90 = 3x + x - 10

x = 25

hence the cost of the book is x - 10 = 15

and the cost of each pen is 25

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The value of the equation A = 154,504 / 28 = 5518

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the equation be represented as A

Let the dividend be p = 154,504

Let the divisor be q = 28

Substituting the values in the equation , we get

A = p / q

A = 5,518

     5518

28 | 154504

1 4 0      

 1 4 5    

 1 4 0    

     5 0  

     2 8  

     2 2 4

     2 2 4

         0

So , the remainder of the equation is 0 and the quotient is 5518

Hence , the equation is A = 5518

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The probability that two random people being born on the same day is thus 1/365 or about 0.3%

We apply our probability model above to the task at hand.

First, we suppose Person 1. This person is born on a certain date of the year.

Since this is a random person, we can fix this person's birthday to a specific date (a number between 1 and 365) without loss of generality for the problem.

Let's say this person is born on 10. (i.e. January 10th)

Now, we take Person 2. In order to achieve the event that Person 2 is born on the same date as Person 1,

we need them to be born on 10. In other words, we seek the probability of Person 2 being born on 10.

Based on our model, we have that this probability is 1/365.

The probability that two random people being born on the same day is thus 1/365 or about 0.3%

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If you invested $10000 in a stock with 5% compounded monthly you will have $16470 in 10 years.

Compound interest is simply interest that is earned over prior interest. You receive interest on the initial principal as well as the interest that builds up over time when you open a savings account that pays compound interest.

When you deposit funds into a savings account or other type of account, you will earn interest on the amount you deposited. For instance, after a year, if you deposited $1,000 in an account with 1% annual interest, you would have received $10 in interest.

Compound interest formula is

[tex]$A = P(1 + \frac{r}{n})^{nt}[/tex]

A = final amount

P = initial principal balance

r = interest rate

n = number of times interest applied per time period

t = number of time periods elapsed

Here,

P = $10000

r = 5%

n = 12

t = 10

A = to find

Lets solve,

[tex]$\text A = 10000(1 + \frac{0.05}{12})^{12\times 10}[/tex]

A = 16470

Thus, If you invested $10000 in a stock with 5% compounded monthly you will have $16470 in 10 years.

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The amount of each item, pizza and chicken wings that should be bought are 7 and 4 respectively. For an additional member the additional number of pizzas is 0 and chicken wings are 10.

A mathematical definition of an equation is a claim that two expressions are equal when they are joined by the equals sign ("=").

A: X is the quantity of pizzas, while Y is the quantity of bags of chicken wings.

1 pizza cost x, thus 6 cost = 6 x

1 bag of chicken wings costs y dollars, thus 7 cost = 7 y.

Given: Total cost = 6x + 7y = 70

Total servings are now equal to (24)(2) for a total of 48.

One pizza includes four portions, thus 1 x 4 = 4

Servings in a bag of chicken wings are 5y.

Servings total: 4x + 5y = 48

The set of linear equations is hence 1.

6x + 7y = 70 .....(I)

4x + 5y = 48 ......(II)

Having solved (I) and (II), we obtain x = 7 and y = 4.

B:

One more guest brings the total to 25.

Total portions are therefore 4x + 5y = 2.25 = 50.

The total cost of 6x + 7y stays at 70.

The set of linear equations is hence 1.

6x + 7y = 70 .....(I)

4x + 5y = 50 ......(II)

We obtain x = 0 and y = 10 by solving for (I) and (II).

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Answer:

[tex]\large\boxed{\sf 0.133 }[/tex]

Step-by-step explanation:

The given equation to us is ,

[tex]\longrightarrow 3^{2-3x}= 4^{2x+1} \\[/tex]

Take log to base 10 on both sides,

[tex]\longrightarrow \log_{10} 3^{2-3x}= \log_{10} 4^{2x+1} \\[/tex]

Now recall that, [tex] \log a^m = m\ log \ a [/tex]

[tex]\longrightarrow (2-3x) \log_{10} 3 = (2x+1)(\log_{10} 4)\\[/tex]

We can write it as ,

[tex]\longrightarrow (2-3x) \log_{10}3=(2x+1)\log_{10}2^2 \\[/tex]

Again using the property mentioned above,

[tex]\longrightarrow (2-3x)\log_{10}3 = 2(2x+1)\log_{10} 2 \\[/tex]

[tex]\longrightarrow (2-3x)\log_{10}3 = (4x+2)\log_{10} 2 \\[/tex]

Now we know that ,

On substituting the values, we have ,

[tex]\longrightarrow (2-3x)0.477 = (4x+2)0.301 \\[/tex]

simplify by opening the brackets,

[tex]\longrightarrow 0.954 - 1.431x = 1.204x + 0.602 \\[/tex]

[tex]\longrightarrow 1.204x + 1.431x = 0.954 - 0.602 \\[/tex]

[tex]\longrightarrow 2.635x = 0.352 \\[/tex]

[tex]\longrightarrow x =\dfrac{0.352}{2.635} \\[/tex]

[tex]\longrightarrow \underline{\underline{ x = 0.133 }} \\[/tex]

and we are done!

The required algebraic expression is x-3

An algebraic expression in mathematics is an expression which is made up of variables and constants, along with algebraic operations (addition, subtraction, etc.). Expressions are made up of terms.

Given here: The statement "A number subtracted from 3 "

Thus translating the given text we get the following:

Let the number be x

And we have have to subtract 3 from x

Thus the algebraic expression is given by x-3

Hence, The required algebraic expression is x-3

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The best predicted weight for an adult male who is 185 cm tall is approximately 164.65 kg.

A linear pattern with no other non-linear patterns or outliers is indicated by a scatter plot.

To find the best predicted value of weight (y) for an adult male who is 185 cm tall, you can use the equation:

y = -101 + (1.09 * x)

where x is the height in centimeters.

Substituting 185 for x, we get:

y = -101 + (1.09 * 185) = 164.65 kg

So the best predicted weight for an adult male who is 185 cm tall is approximately 164.65 kg.

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Answer:

To find the coordinates of P so that P partitions segment AB in the part-to-whole ratio of 1 to 5 with A(-9, 3) and B(1, 8), we can use the formula:

P = (1 - t)A + tB

where t is a scalar value that represents the position of P on the segment AB, and A and B are the coordinates of the two endpoints of the segment.

In this case, we know that the part-to-whole ratio is 1:5, so t = 1/6.

So we substitute the values for A, B and t into the formula:

P = (1 - 1/6)A + (1/6)B

P = (5/6)A + (1/6)B

P = (-95/6, 35/6) + (1/6, 8/6)

P = (-15/2, 5/2) + (1/6, 4/3)

P = (-15/2 + 1/6, 5/2 + 4/3)

P = (-30/3, 23/6)

The coordinates of P are (-10,3.83)

For the second problem,

To find the coordinates of P so that P partitions the segment AB in the ratio 3 to 1 if A(7, -4) and B(-5, 4), we can use the same formula as above:

P = (1 - t)A + tB

In this case, we know that the part-to-whole ratio is 3:1, so t = 3/4.

So we substitute the values for A, B and t into the formula:

P = (1 - 3/4)A + (3/4)B

P = (1/4)A + (3/4)B

P = (7/4, -4/4) + (-53/4, 43/4)

P = (7/4 + -15/4, -4/4 + 3)

P = (-8/4, -1/4)

The coordinates of P are (-2,-0.25)

So in the first problem point P is (-10,3.83) and in the second problem point P is (-2,-0.25)

Answer:

d) 80°

Step-by-step explanation:

For isosceles triangle,

→ The other two angles are equal.

The given angle,

→ <A = 100°

Formula we use,

→ <A + <B + <C = 180°

Forming the equation,

→ 100° + x + x = 180°

Now the value of x will be,

→ 100° + x + x = 180°

→ 100° + 2x = 180°

→ 2x = 180° - 100°

→ 2x = 80°

→ x = 80°/2

→ [ x = 40° ]

Adding values of both angles,

→ x + x = 2x

→ 2 × 40° = 80°

Hence, option (d) is correct.

The bolts that are destroyed due to being more than 2 standard deviations from the mean will have a length of 10 cm ± 0.15 cm.

This means that any bolts that are shorter than 9.85 cm or longer than 10.15 cm will be destroyed. Any bolts that fall within this range will pass the quality-control check and will not be destroyed.

The manufacturer should also have a policy in place to ensure that bolts that are found to be too short or too long are discarded and not put into circulation. This will help maintain the quality of the bolts that are produced.

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Answer:

There are only 6 factors of the number 44 which are 1, 2, 4, 11, 22 and 44.

From this list, the factors of 44 are:

1) 22

2) 44

3) 1

4) 4

5) 11

6) 2

Answer:

1,2,4,11,22,44

Step-by-step explanation:

Let's work our way up.

You can start with 1, cause every number has a factor of 1. Then you can find that 44, cause every number is divisible by itself. and 1 × 44 = 44. Since 44 ends with a 4, it has to be divisible by 2. So to find the number that multiplies with 2 to get 44, divide 44 by 2 which equals 22. So 2×22=44. 44 is not divisible by 3. But it is divisible by 4. 4×11=44. No other number is a factor of 44. Therefore; 1,2,4,11,22,44

Hope that helps. Let me know if you have any further questions!

Hi There! Your Answer would be 20. Why you might ask? allow me to tell you the reason!

you first make a "House" Around the Dividend, the biggest number goes outside of the box, then you just do basic division until you get a zero!

We would be left with 20.

If this helped you make me brainliest

Keep Learning; Keep Asking!

Where in the figure, ∠RQS Is-congruent to ∠QLK. 3 lines are shown. Lines SP and KN are parallel. Line R M intersects line SP at point Q, and intersects line KN at point L. ∠RQS is x degrees. ∠ KLM is (x minus 36) degrees. Note that the value of x will be 108°.

With regard to the problem description and the image attached,  we know that

m∠RQS≅m∠QLK ⇒ by corresponding angles

m∠KLM + m∠QLK=180° ⇒  by supplementary angles (consecutive interior angles)

Since

m∠RQS=x° ⇒  given in the problem

Therefore,

m∠QLX = x°

m∠KLM=(x-36)° ⇒  given problem

executing a substitution we have:

(x - 36)° + x° = 180°

2x = 180 + 36

2x = 216

x = 216/2

x = 108°

Thus, it is correct to state that the value of x in the diagram is 108°

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