Mathematics High School

If a set of data is in the direction of a downward line, which of the following would be the best model for this data?
Quadratic regression model
Exponential regression model
Linear regression model
None of the above

Answers

Answer 1
I'm not too sure about this, but I feel that it's a linear regression. A quadratic one eventually reverses direction, and an exponential one levels off and stops decreasing.

Related Questions

a boat salesperson earns a 2.5% commission on the sale of each boat Find the commision earned on a boat that sells for 18,500

Answers

100% = 1.0
2.5% = 0.025

So now we know the decimal that corresponds to 2.5%, so all we have to do is multiply the price of the boat by this value in order to find the commission earned:

18 500 x 0.025 = $462.50
Whenever you need to find the percentage OF a number (often money), you just convert that percentage to a decimal (just move the decimal to the left twice so 40% becomes 0.40, 10.5% becomes 0.105, 2% becomes 0.02, etc) and MULTIPLY that decimal by the amount/number you need to find the percentage of.

For example, find the 20% commission of a $10,000 car sale
Calculation:
0.20x$10000 = $2000
Answer:
the commission would be $2000

That’s how you do it. I hope that helps. You should be able to solve it on your own now.

How do you write 100, in an exponential form

How do write 100,000, in an exponential form

And how do you write 10,000 ,in an exponential form

Answers

1. 10^2

2. 10^5

3. 10^4

Hope this helped!

Nate

Final answer:

Numbers can be written in exponential form with a base of 10. For example, 100 is written as 10^2, 100,000 as 10^5, and 10,000 as 10^4.

Explanation:

To write numbers in exponential form, you need to understand the concept of exponential notation which is a way to express a number as a base raised to a power. In each of the given cases, the base is 10.

For 100, there are two zeros following the 1. This means that 100 can be written as 10 to the power of 2, or 10^2.

Similarly, for 100,000, there are five zeros following the 1. This would be written as 10 to the power 5, or 10^5.

Lastly, 10,000, has four zeros following the 1. This would be written as 10 to the power of 4, or 10^4.

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3(b-4)=5b-2 plz help I'm confused

Answers

3( b-4) = 5b - 2

3b - 12 = 5b - 2

3b - 5b = 12 - 2

-2b = 10

b = -5

hope this helps
3b-12=5b-2
-12=2b-2
-10=2b
b=-5

ALGEBRA 2- Which equation has the solutions x = 1 ± √5 ?

A. x2 + 2x + 4 = 0
B. x2 – 2x + 4 = 0
C. x2 + 2x – 4 = 0
D. x2 – 2x – 4 = 0

Answers

A. But you can also read a book and not rely on this
D. x^2 - 2x - 4 = 0

You can solve this problem 2 different ways.
1. Plug in a value of x = 1 ± √5 into each of the possible equations and see if the result is 0.
or
2. Use the Quadratic formula to solve each of the equations and see which comes up with the correct answer.

For this case, I'll use the 2nd option.
A. x^2 + 2x + 4 = 0
a = 1, b = 2, c = 4
Upon attempting this, you'll quickly discover that you're going to try to get the square root of -12. Since there's no imaginary terms in the desired root, this equation can't be it.

B. x^2 – 2x + 4 = 0
Same issue here, trying to get the square root of a negative number. So this one doesn't work either.

C. x^2 + 2x – 4 = 0
Getting closer. Have (-2 ± sqrt(20)) / 2 = -1 ± √5
Still not it, but closer. At least not trying to get the square root of a negative number.

D. x^2 – 2x – 4 = 0
Since the other 3 are wrong, this must be right. But let's do the math anyway.
a = 1, b = -2, c = -4
The quadratic formula gets  (2 ± sqrt(20)) / 2 = (2 ± 2√5)/2 = 1 ± √5
And it works out. So this is the answer.

Ohhhhh! I have a Brainliest!

Answers

answers: 1.) 37 & 2.) 1 2/3
1.      4.5+8.75+9.5+10+4.25=37

2.  4 1/3

hope this helps please give brainliest and 5 stars and a thank you

When the factors ofa trinomial are (x+ p) and (x + q) then the coefficient ofthe x- term in the trinomial is:?

Answers

the sum of p and q for apex

What is 4,080,499 rounded to the nearest thousand?

Answers

4,080,499 rounded to the nearest thousand is 4,080,000.

The length of a rectangle is two thirds its width. the area is 12 square meters. find its width. round your answer to two decimal places.

Answers

L = [tex]( \frac{2}{3} )[/tex]w
a = 12 
Length times width = area 
L · w = a
[tex]( \frac{2}{3} )[/tex]w · w = 12
[tex]( \frac{2}{3} )[/tex] [tex] w^{2} [/tex] = 12
Divide both sides by [tex] \frac{2}{3} [/tex] or mulitply both sides by [tex] \frac{3}{2} [/tex] (either one is fine)
[tex]( \frac{2}{3} )[/tex] ÷ [tex]( \frac{2}{3} )[/tex] [tex] w^{2} [/tex] = 12 ÷ [tex]( \frac{2}{3} )[/tex]
or
[tex]( \frac{3}{2} )[/tex] [tex]( \frac{2}{3} )[/tex] [tex] w^{2} [/tex] = 12 [tex]( \frac{3}{2} )[/tex]
[tex] w^{2} [/tex] = 18
Square root both sides to get rid of the squared on the w
[tex] \sqrt{w^{2} } [/tex] = [tex] \sqrt{18} [/tex]
w = 4.24

50 POINTS formula plus solution.
A regular pentagonal pyramid has a base area of 300 m2 and a lateral area
is 70 m2. What is the surface area of the regular pyramid?

A. 370 m2
B. 185 m2
C. 670 m2
D. 118 m2

Answers

To get the surface area, add all areas together

IN this case 300 and 70

your answer is A

hope this helps

The larger of two numbers is one more than four times the smaller number. if the sum of the numbers is 106, find the numbers.

Answers

Call the numbers x and y. According to the first sentence, x = 4y + 1. According to the second sentence, x + y = 106. You can combine these two equations to find the values of these variables:

x + y = 106
4y + 1 + y = 106
5y = 105
y = 21

We have y, so now we can solve for x using either original equation:

x + y = 106
x + 21 = 106
x = 85
Final answer:

To solve the problem, create two equations based on the information given, then solve these equations step-by-step. After calculation, the two numbers are 21 and 85.

Explanation:

Given the problem, we can translate and create two equations which are:

The larger number is one more than four times the smaller number. We can express this as: L = 4S + 1 The sum of the numbers is 106. We can express this as: L + S = 106

Step 1: From the first equation, we know that L = 4S + 1. We can substitute this into the second equation in place of L, giving us 4S + 1 + S = 106.

Step 2: Add up, and we get 5S + 1 = 106. Subtract 1 from both sides and we get 5S = 105.

Step 3: Divide both sides by 5 to solve for S, we get S = 21.

Step 4: Substitute S = 21 into the equation L = 4S + 1, you can calculate and find L = 85.

Therefore, the two numbers are 21 and 85.

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Lisa purchased a prepaid phone card for $25 . Long distance calls cost 12 cents a minute using this card. Lisa used her card only once to make a long distance call. If the remaining credit on her card is $19.96 , how many minutes did her call last?

Answers

Her call lasted 42 minutes.
Find the difference between 25 and 19.96 and divide the difference by 12.

The hypotenuse of a right triangle measures 10 inches and the side opposite to <0 one of the non right angles is 5 inches long

The measure of <0 is
30
45
60
90
?

Answers

Final answer:

The measure of angle <0 in the right triangle is approximately 30 degrees.

Explanation:

To find the measure of angle <0 in the right triangle, we can use trigonometry. The side opposite to angle <0 is given as 5 inches. The hypotenuse is given as 10 inches. We can use the sine ratio to find the angle:

sin(<0) = opposite/hypotenuse

substituting the given values:

sin(<0) = 5/10 = 0.5

Now, to find the measure of angle <0, we can use the inverse sine function:

<0 = arcsin(0.5)

Using a calculator, we find that the measure of angle <0 is approximately 30 degrees.

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Find four consecutive integers with the sum of 54

Answers

54/4 = 13.5

 take the 2 whole numbers below 13.5 and the 2 whole numbers above 13.5

12 + 13 + 14 + 15 = 54

If 5 people including mary and bob are arranged randomly in a line, what is the probability that mary and bob are next to one another?

Answers

There are 5! (5 x 4 x 3 x 2 x 1 = 120) potential different arrangements for 5 people picked at random. Of those, let's take a look at all of the possible arrangements with Mary and Bob next to each other:

MBXXX
BMXXX
XMBXX
XBMXX
XXMBX
XXBMX
XXXMB
XXXBM

There are 8 arrangements out of the 120 where Mary and Bob are next to each other, which means that they have an 8/120 = 1/15 chance of ending up in that situation.

Which of these is false?
A) 21,730 < 22,341
B) 21,730 > 22,341
C) 22,341 > 21,730
D) 22,341 < 24,687

Answers

B. 21,730 is not greater than 22,341.
Final answer:

The false statement among the given options is B) 21,730 > 22,341. The greater than, less than symbols should be accurately used to compare two numbers. The other given statements are true.

Explanation:

The false statement in the given options is B) 21,730 > 22,341. This statement is saying that 21,730 is greater than 22,341, which is false. In mathematics, '<' symbol represents 'less than' and '>' represents 'greater than'. So, the statement B) is false because 21,730 is not greater than 22,341, but less.
Comparing the following two statements A) 21,730 < 22,341 and C) 22,341 > 21,730, we can see they are actually the same statement, restated in a different manner. Both statements are saying that 21,730 is less than 22,341 which is true.
The statement D) 22,341 < 24,687 is also true because 22,341 is less than 24,687.

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At a toy factory, toy cars are produced on an assembly line. It takes 8.216 seconds to attach the wheels. It takes 3.652 seconds to attach the hood. How long does it take to attach the wheels and hoods on 42 toy cars

Answers

the answer is 11.868 hopes this helps

At a toy factory, it takes 498.456 seconds to attach the wheels and hoods on 42 toy cars.

We have been given that toy cars are manufactured on an assembly line in a toy factory. Attaching the wheels takes 8.216 seconds. Attaching the hood takes 3.652 seconds.

What are Arithmetic operations?

Arithmetic operations can also be specified by subtracting, dividing, and multiplying built-in functions. The operator that performs the arithmetic operation is called the arithmetic operator.

* Multiplication operation: Multiplies values on either side of the operator

For example 12×2 = 24

To determine the time it takes to attach the wheels and hoods on 42 toy cars

According to the given condition, the arithmetic form would be as

⇒ 42 × (8.216 + 3.652)

Calculate the sum of the difference to get,

⇒ 42 × (11.868)

Apply the multiplication operation, and we get

⇒ 498.456

Therefore, it takes 498.456 seconds to attach the wheels and hoods on 42 toy cars.

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Hanks pickup can travel 60miles on 4gallons of gas. How many gallons will hanks pickup need to travel 30miles?

Answers

Hank can go 30 miles with 2 gallons.This is the answer because 30 is half of six so simply do 4 divided by half and get 2. Hope i helped

The length of a rectangle is 3 meters less than twice the width. if the area of the rectangle is 527 square​ meters, find the dimensions.

Answers

The rectangle is 17 meters wide and 31 meters long. To solve this problem, first work out the equation for the length of the rectangle. Using the information given, we find that length (L) is given by L=2W-3. Next we setup the formula for the area of a rectangle, A=(W)(L). We are told that the area is 527 sq. meters, so our equation is 527=(W)(L). We also know that L=2W-3, so we can plug that into the equation for area as well which gives us 527=W(2W-3), which can be written 0=2(W^2)-3W-527. We now need to solve this equation for W. Factoring the left side we get, 0=(W-17)(2W+31). Thus, either (W-17)=0 or (2W+31)=0 must equal zero. Solving these two equations, we get W=17 or W=-15.5. Since we are looking for the width (which is a length), we know it cannot be negative and therefore the width must be 17 meters. Now that we know the width, we can plug W=17 back into the equation for length (L=2W-3). Doing this give us L=2(17)-3 which is equal to 31. Thus the length is 31 meters.

Answer:

w=17

l=31

Step-by-step explanation:

correct

What is the square root of 83 to the nearest tenth?

Answers

Knowing the squareroot of 81 is 9, we can easily know that square root of 83 is close to 9.

9 to the closest tenth is 10.

Hope I helped :)

Based on the information given the square root of 83 to the nearest tenth is 9.1.

Square root:

To determine the square root to the nearest tenth we will have to find the square root of the given number which is 83.

Hence,

Square root=√83

Square root= 9.1104335791443

Square root=9.1 nearest tenth

Inconclusion the square root of 83 to the nearest tenth is 9.1.

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In the triangles below, ma + md = 90°. using the information given about the triangles below, determine how the triangles can be shown to be similar.

Answers

Find two numbers that arent the same that equal 90.

Answer:

The triangles are similar by AA

Step-by-step explanation:

Reflection : Across the line y = 1

Answers

What is the question supposed to be?

Reflecting across y = 1 means each point's position stays the same horizontally but mirrors vertically across the line.

When reflecting a point or shape across a line, y = 1,

it means that each point is mirrored on the other side of the line while maintaining the same distance from the line.

Here, the line y = 1 acts as a "mirror" or "axis of reflection."

To reflect a point (x, y) across the line y = 1, follow these steps:

Find the vertical distance between the point and the line y = 1. Let's call this distance "d."

If the point is above the line (y > 1), then d = y - 1.

If the point is below the line (y < 1), then d = 1 - y.

Move the point to the same vertical distance on the other side of the line y = 1.

If the point was above the line (y > 1), the new reflected point will be (x, 1 + d).

If the point was below the line (y < 1), the new reflected point will be (x, 1 - d).

Keep in mind that the x-coordinate remains the same in both cases since the line of reflection is vertical (parallel to the y-axis).

By repeating these steps for all points in a shape, obtain the reflection of the entire shape across the line y = 1.

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Evaluate a + b2 for a = 2 and b = 3. 8 11 25

Answers

a + b^2 for a = 2 and b = 3
= 2 + 3^2
= 2 + 9
= 11
answer
11
8

a+b2
replace the letter with it's number
2+3(2)
multiply 3 and 2
2+6
add
8

Assume that lines that appear to be parallel are parallel. Find the value of x and the measure of angle y

Answers

What information have we been given here? From the diagram, we can see that (9x+1)° and (14x-34)° degrees are supplementary, meaning:

(9x+1)+(14x-34)=180

There, we have an equation we can fairly easily solve for x. What about y?

If we take a look at the line y° occupies, we can see that it shares a straight angle with our (14x-34)° term and - as implied by the right angle on the bottom line - a 90° angle.

All three of these should add up to 180°, so we have:

(14x-34) + y + 90 = 180

Another think to note is that, upon inspection, (14x-34)° and y° are complementary - they add up to 90° - and subtracting the 90 from both sides of our equation confirms that fact:

(14x-34) + y = 90

If you've solved for x prior to this, solving for y should be pretty straightforward.

Answer:

The answer would be (14x-34) + y = 90.

Step-by-step explanation:

How do I graph this equation?

Answers

just plot some points  

for example when x = 0 y = 0-9 = -9

do the same with values of x  from -3 to + 3  in steps of 1.
Answer is below...................

It costs $6 per pound for peanuts at Blessed Food Market. Which of the following represents the range of the function in terms of cost per pound?


A. $6
B. Amount of Peanuts
C. Cost of Peanuts Purchased
D. Peanuts Purchased

Answers

Hey there :) Great Question
The answer is C.Cost of peanuts purchased.
The reason being is that the cost of peanuts purchased will be equal to how much it costed per pound, and will show you how many pounds were purchased.

D and B wouldnt be the answer because you cant know how much every single peanut weighs each one is a different weight.

Answer:

C

Step-by-step explanation:

I did it and got it right!

Suppose you are going to make a sandwich. You have mayonnaise and mustard to spread on the bread. You have white, wheat, and rye bread. You have ham, turkey, and pastrami. How many different sandwiches can you make using one spread, one type of bread, and one type of meat?

Answers

18 samiches
 m8 thats alot of samiches

2 spreads

 3 breads

 3 meats

2 * 3 *3 = 18

 18 different sandwiches....now I'm hungry

Ive been super sick so im a little behind. Help please .

1. A line goes through the points (8,9) and (-2,4)
(a) What is the slope of the line? Show your work
(b) Write the equation of the line in point-slope form. Show your work
(c) Write the equation of the line in slope-intercept form. Show your work.

Answers

(a) formula: (y2-y1)/(x2-x1)
(4-9)/(-2-8) = (-5)/(-10) = 0.5

(b) formula: y-y0 = m(x-x0) where x0,y0 is a point on the line and m is the slope
y - 9 = 0.5 ( x - 8 )

(c) formula: y=mx + b
Start with formula from (b)
y -9 = 0.5x - 4
Add 9 to both sides
y = 0.5x +5
Hope this helps.
The answers are in the top right corner.

Brainliest reward math question

Answers

dude you are puuting up so many questions today.
hard questions im trying. too hard
1. A
To do find the deduction, you do 978 x.05.
2. I don't understand the question at all, I'm very sorry.

Suppose you go shopping for a new futon bed for your apartment/home. The model you really like happens to be on sale for $1100. It's original price is $1200. What percent of the original price will you save if you purchase it? Write your answer to the nearest tenth of a percent, but in decimal form.

Answers

If a model of a bed is on sale for $1100 out of $1200, you determine the percentage off with 1100/1200, which simplifies to 11/12. 11/12 is 91.7%. We then subtract that from 100%, so we get 100-91.7, leading us to a percentage saved of 8.3%.

A train travels 750 miles in 15 hours. which unit rate describes the speed of the train?
a. 50 miles per hour
b. 75 miles per hour
c. 150 miles per hour
d. 350 miles per hour

Answers

The answer your looking for is A
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