Mathematics Middle School

Solve the equations:
1. 9x - 5 = 5x + 7
2. 8x - 2 = x - 16
3. 8x + 5 = 2x + 23
4. 2x + 8 = 5x + 20
5. 5(2x + 6) = 3x - 5

Answers

Answer 1

Answer:

5(x – 4) + 3x – 9x = 6 – (2x + 5) + 8x

step1:-   5x - 20 + 3x - 9x = 6 - 2x - 5 + 8x

step2:- 5x + 3x - 9x - 20 = 8x - 2x + 6 - 5

-x - 20 = 6x + 1

stp 3

-20 = 7x + 1

step 4

-21 = 7x

divide both sides by 7:-

-3 = x

thats the solution   x  = -3

Answer 2

Answer:

1. X=3, 2. X= -2, 3. X=3, 4. X= -4

Related Questions

Bella ordered Christmas presents online through Amazon Prime. She noticed 2 out
of every 5 orders was wrong. If she ordered 45 presents through Amazon, how
many can she expect to be wrong?

Answers

Answer:

18

Step-by-step explanation:

so i do math a weird way but i’ll try to explain it and i’ll have the answer at the bottom

so 2/5 is 40%

40% of her orders are wrong

40% of 45 = 45•0.4

this equals 18

she should expect to receive 18 amazon packages that are wrong

Evaluation
something i bet yall know how to do :]

Answers

Answer:

1 over 27 i believe!!!!!

can some one help me pleeeeeeeeeeeeeeeeeeeeeeeeeeeaaaaaase

Answers

Answer:

X=8

Step-by-step explanation:

Find the value of x

3/4 x-4=8

Answers

Answer: x  =  16

Step-by-step explanation:

Solve for   x  by simplifying both sides of the equation, then isolating the variable.  :)

Cecile packages snack mix at a health food store.
She uses 13 of her supply of sunflower seeds to make a salted snack mix and 29 of her supply to make an unsalted snack mix. If Cecile uses 10 pounds of sunflower seeds, how many pounds of seeds are in her supply?
18 pounds
23 pounds
30 pounds
40 pounds

Answers

Answer:

Her supply has 18 pounds

Please give branliest :)

Explanation:

Assume that the number of pounds in her supply is x.

We are given that:

She uses 1/3 x in salted mix and 2/9 x in unsalted mix.

This means that:

Total amount used = 1/3 x + 2/9 x = 5/9 x of her supply

Now, we are also given that:

She used 10 pounds of her supply.

This means that:

5/9 x = 10

5x = 9*10 = 90

x = 18 pounds

23 pounds here is your answer buddy

Here is a recipe for pineapple soda: For every 5 cups of soda water, mix in 2 cups of pineapple juice. How much pineapple juice would you mix with 20 cups of soda water? *
1 point

Answers

Answer:

8 cups

Step-by-step explanation:

Answer:

The answer would be 8

Step-by-step explanation:

5 divided by 20= 4

4x2= 8

The intersection of parallel lines b and c and transversal line d form several special angle relationships, as shown in the image below.



Which angles are congruent to 3? Select all that apply.

∠2
∠7
∠6
∠4

Answers

Answer:

<2

Step-by-step explanation:

angle 7 and angle 2

please help lol its about size of divisor

Answers

Probably like 1,000 I would say

ONLY TRUE ANSWER [BRAINLY]

Marcus and Judy are picking apples. At the end of the day, Marcus has p apples. Judy
has 5 times as many apples as Marcus.

Which expression represents the number of apples Judy has in terms of p?



A p – 5

B 5 + p

C 5/p

D 5p

Answers

Answer:

d  5p

Step-by-step explanation:

it would be 5 * p so 5p

A balance diagram going from 10 to 20. The mean is 13.
There is 1 circle above 10 and 11.
Which value should be added to this data set to produce a mean of 13?

Answers

Answer:

maybe 18-

Step-by-step explanation:

not really sure

I think it would be 18

The spinner is spun 480 times. What is a reasonable prediction of it landing on a number greater than 5?

Answers

Answer:

Step-by-step explanation:

3!!!!!!!!!!!!!! REEEEEEEEEEEEE

I will award brainliest also!!!

Answers

Answer:

infinite solutions

Step-by-step explanation:

the answer would be, infinite solutions

Which expression is equivalent to 1/2(2x-8)
A) 4x− 16
B) x− 4
C) 2x− 4
D) x− 8

Answers

Answer:

B) x - 4

Step-by-step explanation:

In this question, you have to simplify the expression to get your answer.

Solve:

1/2(2x - 8)

Use the distributive property.

1/2(2x) + 1/2(-8)

x + 1/2(-8)

x - 4

Your answer would be B) x - 4

The anwser should be b

I will give a brainliest to whoever can answer this question: Samantha paid $26.25 for three books that all cost the same amount. What was the cost per book?

Answers

8.75

you need to divide 26.25 by 3 which is equal to 8.75

I NEED HELP ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

I think it means that you can fit five chairs in one round table.

Step-by-step explanation:

I looked for the ratio or whatever it is called and I found on the graph that 2 round tables can fit 10 chairs and half of that would be 5:1.

You got the answer now

Use the spinner to find the theoretical probability of spinning an even number.

Answers

The answer is 1/2. you do ask over total.

HElp ALL MY POINTS !!!!

Answers

Answer:

the correct answer is C

Answer:

c

Step-by-step explanation:

the numbers inside the parenthesis are just flipped :)

Solve the following system of equations.

2x+y=3

x=2y+1

Make sure there are NO SPACES in your answer. Include a comma in your answer.


ANSWER: {( )}

Answers

2x+y-3=0,x-2y=1 okay that's the answer good luck
subtract y from both sides
now we have
2x = -y + 3
divide both sides by 3
x= -y/2 + 3/2
the other x equals 2y +1, set these equal to eachother

2y + 1 = -y/2 + 3/2

add y/2 to both sides

2.5y + 1 = 3/2

subtract 1 from both sides

2.5y = 0.5

divide both sides by 2.5

y=0.2

plug in 0.2 for y in an original equation

x = 2(0.2) + 1

solve

x = 1.4

ANSWER:
x= 1.4
y= 0.2

An apartment building that is 51 feet tall casts a 90 foot shadow. At the same time, a tree casts a shadow that is 48 feet long. How tall is the tree?

Answers

Answer:

96 foot tall

Step-by-step explanation:

Answer:

27.2

Step-by-step explanation:

x/48 =51/90

x=27.2

Factor the expression completely:
5 / 6 y - 25 / 42

Answers

Step-by-step explanation:

i got you hope that helps

Mr. Sonny's science class is calculating the average number of blinks per minute. Jan blinks 80 times in 4 minutes. What is her blinking rate, in blinks per minute?

Answers

Answer:

20 tpm

Step-by-step explanation:

Answer:

20

Step-by-step explanation:

because u need to devide-      i suck ik- i tried tho-

By how much did the price of the stock change from the beginning of Week 1 to the end of Week 4?

Answers

Answer:

It changed by 1.2

Step-by-step explanation:

1.5 divided by 1.25 equals 1.2

1.25 times 1.2 equals 1.5

Hope I helped!! :)

Sorry if it's wrong! :(

Pls mark brainlist!!!

Answer:

um you add then you i dont   know to  how to explain this

Step-by-step explanation:

please help ill give brainliest

Answers

i think it’s option a

I literally suck at math,please help me-
Flora made 7 withdrawals of $75 each from her bank account. What was the overall change in her account?
answer choices:
A.+ $525
B.+ $15
C.- $15
D.- $525

Answers

D because u are taking away from ur account I hope it helps
D.

because withdrawals is taking away

The store manager decided to decrease price of ice cream store sells by 10% for the month of July. The amount of ice-cream sold in July increased by 24% comparing to June. Did the store proceedings (money that the store obtained from ice cream sales) increase or decrease in July? By how many percent?

Answers

Answer:

For example:

Price of ice cream in june was 10$ and amount of ice cream sold is 100. Store earned 10$ 100=1000$

Price of ice cream in july has been decreased by 10%. Price of ice cream is now 9$. The amoun of ice cream sold in july increased by 24% compering to june. So amount of sold ice cream in july is 124. Store earned 9$*124=1116$.

Store's proceedings increased in July by 11.6%.

Answer:

increased by 11.6%

Step-by-step explanation:

plz help!!
In a football game, the teams pass the ball on 40% of the plays. Of the passes thrown, greater than 75% are completed. You watch the film of a randomly chosen play. Describe the likelihood that the play results in a complete pass. Explain your reasoning.

Answers

Answer:

there is a 3/4 chance that they pass will be completed, 3/4=75%.

Step-by-step explanation:

Thats all I got, I hope this may help tho! :)

3/4= %75. This is because 75% is equal to 3/4 and 100% would be 4/4 or 1

Help please, I need this for today... All I have to do is find the area of this figure...

Answers

I think it is 15.785
it is 15.785 units

hope this helps dude

Help, please. WILL GIVE BRAINLIEST

A) (1.8,0.4)

B) (2.2,0.1)

C) (2.3 , 0)

D) (2.6, -0.2)

Answers

It’s b because I had that on my paper

Choose the equations for which makes the equation true.
Select all that apply.

Answers

Answer:

a,c,e

Step-by-step explanation:

dividing by 1000 means moving the decimal places 3 times to the left so yea

Help Plz I will give brailiest and 10 points!!!

Answers

Answer:

[tex](-3)^{8}[/tex]

(Hope this helps you out ! <3)

Answer:

6561

Step-by-step explanation:

Multiply the exponents (2*4) to get 8 then do -3 to the power of 8 to get 6561

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