7r - 1 = 2r + 9 last one for now thank you guys so much for helping me!

Answers

Answer 1

Answer:

[tex]r=2[/tex]

Step-by-step explanation:

[tex]7r - 1 = 2r + 9[/tex]

Add 1 to both sides:

[tex]7r-1+1=2r+9+1[/tex]

[tex]7r=2r+10[/tex]

Subtract 2r from both sides:

[tex]7r-2r=2r+10-2r[/tex]

[tex]5r=10[/tex]

Divide both sides by 5:

[tex]\frac{5r}{5}=\frac{10}{5}[/tex]

[tex]r=2[/tex]

Answer 2

Answer:

2

Step-by-step explanation:


Related Questions

It costs $15 to send 3 packages through a certain shipping company. Consider the number of packages per dollar

Answers

It Is Going To Be 5 Because 15÷3=5 And 15÷5=3 And 5×3=15 3×5=15

Find the distance between the points R(0, 1) and S(6, 3.5). The exact distance between the two points is .

Answers

Answer:

the answer 6.5

........

The distance between the points R(0, 1) and S(6, 3.5) is 6.5 units after using the distance formula.

What is a distance formula?

It is defined as the formula for finding the distance between two points. It has given the shortest path distance between two points.

The distance formula can be given as:

[tex]\rm d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]

It is given that:

Two points are:

R(0, 1) and S(6, 3.5)

To find the distance between points R and S we can use the distance formula.

[tex]\rm d=\sqrt{(6-0)^2+(3.5-1)^2}\\[/tex]

The arithmetic operation can be defined as the operation in which we do the addition of numbers, subtraction, multiplication, and division. It has a basic four operators that is +, -, ×, and ÷.

d = √(36 + 6.25)

d = √42.25

d = 6.5 units

Thus, the distance between the points R(0, 1) and S(6, 3.5) is 6.5 units after using the distance formula.

Learn more about the distance formula here:

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need help i will ark u brainiest if you answer these

Answers

A and E are true, rest are false.

only A and E are true

If x = -2, then 2x = -4.
A. Addition Property of Equality
B. Subtraction Property of Equality
C. Multiplication Property of Equality
D. Division Property of Equality
E. I'm not sure.

Answers

I feel both A and C are reasonable explanations

The statement "If x = -2, then 2x = -4" can be demonstrated using the Multiplication Property of Equality.

Option C is the correct answer.

We have,

The Multiplication Property of Equality states that if you multiply both sides of an equation by the same non-zero number, the equality still holds true.

In this case, x = -2.

Multiply both sides of the equation by 2,

2x = 2(-2) = -4

Thus,

The statement "If x = -2, then 2x = -4" can be demonstrated using the Multiplication Property of Equality.

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-13=4x+3

Help please

Answers

Hey there! I'm happy to help!

Let's flip the equation so x is on the left. We want to isolate x to see what it equals.

4x+3=-13

We subtract 3 from both sides.

4x=-16

We divide both sides by 4.

x=-4.

Have a wonderful day! :D

Answer:

[tex] \boxed{ \bold{ \huge{ \boxed{ \sf{x = - 4}}}}}[/tex]

Step-by-step explanation:

[tex] \sf{ - 13 = 4x + 3}[/tex]

Swap the sides of the equation

[tex] \longrightarrow{ \sf{4x + 3 = - 13}}[/tex]

Move 3 to right hand side and change it's sign

[tex] \longrightarrow{ \sf{4x = - 13 - 3}}[/tex]

The negative integers are always added but posses the negative ( - ) sign

[tex] \longrightarrow{ \sf{4x = - 16}}[/tex]

Divide both sides by 4

[tex] \longrightarrow{ \sf{ \frac{4x}{4} = \frac{ - 16}{4}}} [/tex]

Calculate

[tex] \longrightarrow{ \sf{x = - 4}}[/tex]

Hope I helped!

Best regards! :D

what is coefficient of the term 16x

Answers

Answer:

16

Step-by-step explanation:

Answer:

16

Step-by-step explanation:

We are given the term:

16x

We want to find the coefficient.

A coefficient is a constant that a variable is multiplied by. Essentially, it is the number in front of the variable.

The variable in the term is x. The number that precedes the variable is 16. Therefore, the coefficient of the term must be 16.

4 less than 2 times the number x

Answers

Answer:

2x-4

Step-by-step explanation:

1) Since it says 2 times the number x, it is 2x

2) Then, it says 4 less than 28

3) The equation/answer would be 2x-4

Answer:

The answer is 2x-4

pls help me 20 points

Answers

Answer:

Step-by-step explanation:

Its a real number

Answer:

integer

Real Number

Rational

Step-by-step explanation:

Write an equation models the following statement:
17 less than h equals 42

Answers

Answer:

17 < h = 42

Step-by-step explanation:

Hoped this helped! :)

we cannot have a negative number for x (its against the laws of math), so the domain would be all non-negative numbers

Answer:

h - 17 = 42

Step-by-step explanation:

I know this because it was the answer on quizziz

Find the midpoint
(12,15) and (-8, -22)

Answers

Answer is (2, -3.5)

What is 16x4 – 100y4 factored completely

Answers

Answer:

[tex]16x^4-100y^4[/tex]

Step-by-step explanation:

[tex]16x^4-100y^4[/tex]

Since there aren't any like terms, the answer would be:

[tex]16x^4-100y^4[/tex]

Hope this helps!

Answer:

4(2x^2 + 5y^2)(2x^2 - 5y^2)

Step-by-step explanation:

Rewrite:

=4 * 4x^4 + 25 * 4y^4

Factor out common term (4):

=4(4x^4 - 25y^4)

Answer:

4(2x^2 + 5y^2)(2x^2 - 5y^2)

please solve 5p-9=2p+12

Answers

add 9 to both sides
subtract 2p from both sides
7p=21
p=3

The required solution to the equation 5p - 9 = 2p + 12 is p = 7, as of the given condition.

To solve the equation 5p - 9 = 2p + 12, we will follow these steps:

Combine like terms on each side of the equation:

5p - 9 = 2p + 12

Move all the terms containing "p" to one side and the constant terms to the other side. To do this, we'll subtract 2p from both sides and add 9 to both sides:

5p - 2p - 9 + 9 = 2p + 12 - 2p + 9

Simplifying both sides:

3p = 21

Now, to solve for "p," we'll divide both sides of the equation by 3:

3p/3 = 21/3

Simplifying:

p = 7

Therefore, the solution to the equation 5p - 9 = 2p + 12 is p = 7.

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What is the slope of the line ?

Answers

Answer:

The slope of a line characterizes the direction of a line.

Step-by-step explanation:

To find the slope, you divide the difference of the y-coordinates of 2 points on a line by the difference of the x-coordinates of those same 2 points. also You can determine the slope of a line from its graph by looking at the rise and run. One characteristic of a line is that its slope is constant all the way along it. So, you can choose any 2 points along the graph of the line to figure out the slope.

I need help with this

Answers

Answer:

see explanation

Step-by-step explanation:

Under a counterclockwise rotation about the origin of 270°

a point (x, y ) → (y, - x ) , thus

C)- 8, - 4 ) → C'(- 4, 8 )

D(0, - 4 ) → D'(- 4, 0 )

E(- 8, - 9 ) → E'(- 9, 8 )

Find the perimeter of this triangle.

Answers

Answer:

15.67 units

Step-by-step explanation:

Points on the graph:

(3,6), (7,3) and (10,5)

Perimeter is the sum of side lengths

Side length is the distance between points

Distance is found by the distance formula:

d = [tex]\sqrt{(x2-x1)^2 + (y2-y1)^2}[/tex]

Sides:

1. [tex]\sqrt{(7-3)^2 + (3-6)^2}= \sqrt{16+9} = 5[/tex]2. [tex]\sqrt{(10-3)^2 + (5-6)^2} = \sqrt{49 + 1} = \sqrt{50}[/tex] = 7.073. [tex]\sqrt{(10-7)^2 + (5-3)^2} =\sqrt{9 + 4} =\sqrt{13}[/tex] = 3.60

Perimeter:

P = 5 + 7.07 + 3.6 = 15.67

If the value of 2x is 2, then what is the value of x?
12 ?

Answers

Answer:

1

Step-by-step explanation:

Answer:

x=1

Step-by-step explanation:

work backwards.

2x=2

divide the constant by the product

2/2=1

so x=1

Adam and Barb planned a used book sale for the weekend so they gathered their books and agreed on a price for hardbacks and a lower price for paperbacks. Adam sold 14 hardcover books and 20 paperbacks and earned $234 for his efforts. Barb sold 15 hardcover books and 9 paperbacks. Barb made $201. How much did they charge for each hardcover book and for each paperback?

You must show your work.

1) Mathematically what kind of problem is this called? (What concept did you apply to this problem that allowed you to solve it?)


2) Set up the problem showing the equations you’ll use. Please make sure you label or explain what your variables mean.



3) Show the math work to arrive at the answer. Please make it clear which price is hardcover and which is paperback.

Answers

Answer: hardcover books x=11 and paperbacks y=4

Step-by-step explanation:

14x+20y=234

15x+9y=201

Multiply the top equation by 9 and the bottom equation by 20 so the outcome of both equations would be 126x+180y=2106 and 300x+180y=4020 then you subtract the two equations once you do that you get 174x=1914, and the y variable cancels out, once you divide 174 from 1914 you get 11x. So the answer for how much hardcover books cost is 11 dollars. Now we have to find the y variable which we can just plug in 11 (x) into the equation. So 15(11)+9y=201 we get 165+9y=201, subtract 165 from both sides and we get 9y=36 and divide 9 from both sides and we get 4 so y=4 the cost of paperbacks are 4 dollars

Tom and Jerry have a pool with a diameter of 12 ft. What is the
circumference of the pool?

Answers

Hello!

Answer:

[tex]\large\boxed{C = 12\pi ft\text{ or } C = 37.68ft}[/tex]

[tex]\text{Formula for the circumference of a circle:}[/tex]

[tex]C = d\pi[/tex]

[tex]\text{In this instance, d = 12 ft. Plug this value into the equation:}[/tex]

[tex]C = 12\pi ft \text{ or } C = 37.68 ft (\pi = 3.14)[/tex]

Answer: 37.7

Step-by-step explanation: multiply the diameter by pi

Write an equation for each description.
4 times a number is 16.
A number minus 11 is 12
9/10 times a number plus 6 is 51
3 times the sum of 1/3 and 8 is 11​

Answers

Answer:

4x =16

a - 11 =12

9/10x + 6 =51

3(1/3 + 8) =11

Step-by-step explanation:

4.5 divided -1.5 I just want to know the steps to the answer

Answers

Answer:

-3

Step-by-step explanation:

dividing a positive and a negative equals a negative so put the 4.5 in parentheses with the 1.5 and put the negative outside the parentheses. then do what's in the parentheses and add your negative which makes you get a -3

0.4 x 1/10 is what ?

Answers

0.04
1 divided by 10 equals 0.1
0.1 times 0.4 equals 0.04

Answer: 4/100

Step-by-step explanation:

A runner is traveling at a constant rate of 8 meters per second. How long does it take for the runner to travel 100 meters?

Answers

Answer:

Total time taken = 12.5 second

Step-by-step explanation:

Given:

Speed of runner = 8 m/s

Total distance cover = 100 m

Find:

Total time taken

Computation:

Time taken = Distance / Speed

Total time taken = 100 / 8

Total time taken = 12.5 second

I need to know the answer

Answers

I think 89 not sure

Round 2.93 to the nearest whole number.
Answer anyone ?

Answers

Answer:

3

Step-by-step explanation:

2.9 is closest to 3

Answer:

3

Step-by-step explanation:

2.93 rounded to the nearest whole number is 3.

Any values between 2.0 and 2.5 get rounded to 2, while any values between 2.5 (incl. 2.5) to 3.0 get rounded to 3.

Examples:

2.93 -> 3

2.73 -> 3

2.5 -> 3

2.49 -> 2

2.35 -> 2

2.1 -> 2

The two figures below, a regular hexagon and regular pentagon, have the same perimeter. What is the length of one side of the pentagon?

Answers

You could search it up on google

Simplify by using the distributive property: ​

Answers

12. 4(s+5)
4s+20

15. 2(3r-12)
6r-24

18. -3(16-3d)
9d-48

[tex]\huge\boxed{\sf{Hi\:there!}}[/tex]

The Distributive Property states that

a(b+c)=ab+ac

4(s+5)

4s+20

2(3r-12)

6r-24

-3(16-3d)

-48+9d

[tex]\huge\boxed{\bf{Hope\:this\:helps!}}[/tex]

[tex]\Large\bold{Good\:luck!}[/tex]

[tex]\huge\mathfrak{LoveLastsAllEternity}[/tex]

Write a couple sentences to explain how you would find the area of the shaded region:

Answers

Answer:

I would find the area of the circle and then find the area of the shape in the middle and then minus that from the area of the whole circle

Answer:

Step-by-step explanation:

1. Find the area of the circle. Area_c = pi * r^2

2.Find the area of the pentagon in terms of the radius Area_P =

3 sqrt(3) r^2 / 2

The answer you want is Area_shade = Area_c - area_P

Area = pi * r^2 - 3 sqrt(3)r^2/2

Area = r^2 (pi - 3 sqrt(3)/2)

In triangle​ ABC, the size of angle B is 5 times the size of angle​ A, and the size of angle C is 11 degrees less than 4 times the size of angle A.
Find the size of the angles.

Answers

Answer:

A = 19.1°

B = 95.5°

C = 65.4°

Step-by-step explanation:

B = 5A

C = 4A-11

We know that a triangle has a total of 180° so:

180 = A + B + C

Which can be written as:

180 = A + (5A) + (4A - 11)

180 = 10A - 11

10A = 191

A = 19.1°

With A, we can work out B and C:

B = 5(19.1)

B = 95.5°

C = 4(19.1) - 11

C = 76.4 - 11

C = 65.4°

When muiltplying two exponents, If the base numbers are DIFFERENT can u add the two exponents?

Answers

Multiplying exponents with different bases
First, multiply the bases together. Then, add the exponent. Instead of adding the two exponents together, keep it the same.


1. Five gallons of lemonade cost $8.00, which is
a rate of _____per____.

Answers

Answer:

1. $1.60

2. gallon

Step-by-step explanation:

Each gallon of lemonade would cost $1.60.

The rate is $1.60 per gallon.

Hope it helps!

Hey there!

[tex]Answer: \boxed{1.60 \text{ per } gallon}[/tex]

[tex]Explanation:[/tex]

If 5 gallons cost 8.00, we will need to divide to find the amount of 1 gallon each.

$[tex]$8.00/5=1.60[/tex]

So that means that each gallon was $1.60. So the answer to your question is:

[tex]\boxed{1.60 \text{ per } gallon}[/tex]

Hope this helps!

[tex]\text{-TestedHyperr}[/tex]

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