Mathematics Middle School

solve for x: 4x + 9 = 2x - 7

Answers

Answer 1

Answer:

-8

Step-by-step explanation:trust me

Answer 2

Answer:

x=8

Step-by-step explanation:

4x+9=2x-7 (subtract both of the numbers with variables)

-2x

2x=+9-7

-9 -9 (-9-7=16) +* 2 negatives cancels out to make a positive *+

2x=16

16/2=

x=8

Hopefully this is right! I'm rusty on multiple-step equations. This is the strategy I used over the years.

Related Questions

Solve: 3x + (2 - 4x); when x = 5 *

Answers

Answer:

-3

Step-by-step explanation:

3 • 5 + 2 - (4) (5)
15 + 2 - (4) (5)
15 + 2 - 20
15 + -18 (-18 + 15)
-3

Estimate the area of the circle.

Answers

Answer:

Step-by-step explanation:

3in I guess but I’m not exact

Solve for x: -243 = -9(10 + x)

I will reward Brainliest

Answers

Answer:

x = 17

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Equality Properties

Step-by-step explanation:

Step 1: Define Equation

-243 = -9(10 + x)

Step 2: Solve for x

Divide -9 on both sides: 27 = 10 + xIsolate x: 17 = xRewrite: x = 17

Step 3: Check

Plug in x into the original equation to verify it's a solution.

Substitute in x: -243 = -9(10 + 17)Add: -243 = -9(27)Multiply: -243 = -243

Here we see that -243 does indeed equal -243.

∴ x = 17 is the solution to the equation.

Solve the system of equations by substitution. Write your solution as an ordered pair
4x+8y=20
x=3y-20

Answers

Answer: (-5,5)

Step-by-step explanation:

graphing the two equations on a calculator gets the point (-5,5)

Solving it by substitution is:

4(3y-20)+8y=20: substitute the second equation into the first equation (hence the name solving by substitution)
12y-80+8y=20: distribute 4 to 3y and 4 to 20
20y-80=20: combine like terms (12y+8y)
20y=100: add 80 to 20
y=5: divide 100 by 20 and you get 5

:)

What is the prime factorization for 75?
A.
3 × 55
B.
32 × 52
C.
5 × 15
D.
3 × 52

Answers

Answer:

its c

Step-by-step explanation:

since 5x15 is 75

plz mark as brainliest

Answer:

Step-by-step explanation:

5X15 =75

im not done asking questions so people there is more brainliests if ur right :D

Answers

Answer: -6-(-2) is the same as -6+2 because you have to use keep, change, change on the first expression. You are subtracting a negative which means you are adding that number. They both equal -4

Steps:

-6-(-2)

Use keep, change, change to solve because you are subtracting a negative.

-6+2

= -4

BRAINLIEST TO FIRST RIGHT!!!!!!!!!!!
oof, all caps lol:)

Answers

Answer:

x^2 = 121

x = 11 Im wanting brainliest

Step-by-step explanation:

X = 11,

11 x 11 = 121, 121 + 5 = 126
You should give the first person brainliest they answered first :)

NEED HELP!!! Please answer the question! WILL GIVE BRANILY! 15 POINTS!!!

Answers

Answer: D. Cannot be determined.

If Angle 3 were not included, the answer would be A, 360°

Step-by-step explanation: When the lines a, b, & c are parallel, the line intersecting them forms angles that are vertical, supplementary and/or corresponding and congruent.

Here, angles 4 and 5 are supplementary. No need to know their exact measurements. Together, their sum is 180°

Angles 1 and 2 are also supplementary, another 180°

But we don't know the measure of angle 3, so getting an exact sum is impossible here.

This is very very important

Answers

Answer: 784 cubic things. lol is this iready

Step-by-step explanation:

apply the product rules to determine the signof each expression

Answers

Answer:

- + - = +

+ + + = +

+ + - = -

- + + = -

Step-by-step explanation:

Thanks hopes it helps

PLLEASEEEEEEEEEEEEEEEEEEEEEEEEEEEE HELPPPPPPPPPPPPPPPPPPPPPPPPPPP

Answers

Answer:

It's 105 square cm. I am sure

6x15 + (6x5)/2 what he said

Yesterday, there were 90 problems assigned for math homework. Jonah did 20% of them correctly. How many problems did Jonah get right?

Answers

Answer:

18 questions correctly

Step-by-step explanation:

1% of 90 is .9, so .9x20=18

What is the equation of a line passing through point (2, 3) and has a y-intercept of -5?

Answers

Answer: y= 4x-5

Use y1-y2/x1-x2 to find the slope

Use the points (0,-5) and (2,3)

-5-3/0-2

= -8/-2

= 4

Use y=mx+b where m is the slope and b is the y-intercept

So y=4x-5

Please help me out
I don’t know this

Answers

he spent 3/4 less time biking than at the mall

The answer is 3/4 less at the mall

Pleasee help I really dont understand.

Answers

Answer: D.

Step-by-step explanation: Just devide 1,120 by 32

Answer:

The answer is 35.

Step-by-step explanation:

Explanation:

The committee has a total of 1,120 flowers. They wish to divide the flowers evenly into groups of 32. In order to do that you must do 1,120/32 giving you the answer of 35.

Anica says that she can rewrite ANY subtraction problem as an addition problem. Is she correct? Explain how you know!

Answers

yeah i think so because
5-2=3
3+2=3
?

70-20=50
50+20=70
idek

I think it’s true because of family pyramids or whatever they’re called. Like 6-2=4 can be rewritten as 4+2=6 or 2+4=6 if that makes sense :))

Pls help me!! And thank you!!

Answers

Answer:9

Step-by-step explanation: i think its 9

Yes same i think is nine

PLZ HELP ME WITH THESE IF YOU GIVE ME THE CORRECT ANSWER IL GIVE BRAINILEST PLZZZZZZ

Answers

Answer:5. 3/5

Step-by-step explanation:

What are the characteristics of a circle?
plzzzzzzzz help me

Answers

Answer:

1. chord

2. Diameter

3. radius

Step-by-step explanation:

I am not super sure about the first one, my apologies.

I hope this helped and if it did I would appreciate it if you marked me Brainliest. Thank you and have a nice day!

How can you find the distance from a point to the x axis

Answers

Answer:

be a big brain

Step-by-step explanation:

Pls answer quickly!!!!

Answers

Answer:

is this even a subject question if so thanks !

Step-by-step explanation:

I don’t get this question

Solve the system by substitution!

Answers

the answer is (-1,2)

Solve the following system of equations:
y = 5/4x - 2
y = -1/4x + 19

x = ? and y = ?

Answers

Answer:

1. y= 5 /4 x −2

2.x=−4y+76

The value of a and y in the system y = (5/4)x - 2 and y = -(1/4)x + 19 are,

14 and 31/2 respectively.

What are the solutions of a linear system of equations?

If a system of equations only contains two linear equations with two variables, the system's equation can be graphed, the graph will have two straight lines, and the intersection point(s) of those lines will be the system's solution.

There are only three matching forms of solution for a given system of equations because there are only three different ways that two straight lines in the plane can graph.

Given,

y = (5/4)x - 2 and y = -(1/4)x + 19.

Multiplying both the equations by 4 we have,

4y = 5x - 8 and 4y = - x + 76.

Subtracting the second equation from the first we have,

0 = 6x - 84.

6x = 84.

x = 14.

Replacing 'x' in any of the equations,

4y = 5(14) - 8.

4y = 70 - 8.

4y = 62.

y = 31/2.

learn more about the linear system of equations here :

https://brainly.com/question/21404414

#SPJ2

Which of the following number lines represents the solution to x - 5 ≥ -2?

Answers

This one is your answer hope this helps

x - 5 ≥ - 2 represents a line with a close circle on 3 and going towards infinity.

What are inequalities and their types?

Inequality is a relation that compares two numbers or other mathematical expressions in an unequal way.

The symbol a < b indicates that a is smaller than b.

When a > b is used, it indicates that a is bigger than b.

a is less than or equal to b when a notation like a ≤ b.

a is bigger or equal value of an is indicated by the notation a ≥ b.

Given, x - 5 ≥ - 2.

x ≥ - 2 + 5.

x ≥ 3.

This represents a line with a close circle on 3 and going towards infinity.

learn more about inequalities here :

https://brainly.com/question/28823603

#SPJ2

What is the prime factorization of 80?

A. 2×2×2×2×5

B. 2×2×3×5

C. 2×2×2×3×5

D. 2×2×2×5

pls make sure ur correct i have a c in math. ill give u brainliest

Answers

A is the correct answer !

The prime factorization of 80 is A

a. As Cam unlocked her bicycle, she said, “The bones can’t be taken when the museum is open. There are too many people around then, and too many guards.”

b. Cam looked at her watch. It was two-thirty. “Come on, Eric,” she said. “It’s time to go.”

c. Cam raised her hand and tried to get the museum guide’s attention. But Ms. Tyler looked past her.
Read each passage. Which passage shows Cam making an inference?

A B C

Answers

Answer:

Step-by-step explanation:

SHe makes an inference by saying the bones cant be taken when it is open.

Dbecause I have a lot more people that already got me on my Xbox controller so that my boy was a bo

First One To Solve Correctly Gets Brainlyest

Answers

i believe x = 9.76
bc a^2 + b^2 = c^2
2.4^2 + 2^2
5.76 + 4
9.76

Answer:

a^2 +b^2=c^2

Step-by-step explanation:

2^2+2.4^2=c^2

4+5.76=9.76

square root of that is 3.12 or 3.1

so x=3.1

Select all equations that have no solution
СА 6 + 2x 2 (x+6)
B
3 (3x – 4) = -9x + 11
С
11x – (2x + 5) = –2 (-5x – 3)
D
3x – (x - 2) = x +4
E
3x – 2 + 12 – 6x = 4(5 – 2x) – (-4x)

Answers

Answer:

D and C

Step-by-step explanation:

hope this he p s ya

2 1/4 x 10
please help >_

Answers

2 1/4 x 10 + 22.5

hope this helps with your question.

Answer:

22.5

i need at least 20 charactersssss

help this is the last thing for today

Answers

-12+4=-8

I need brainliest

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