MATHEMATICS MIDDLE SCHOOL

Fred by the video game deaths for $4 there was a discount of 20% what is the sale price

Answers

Answer 1
Answer: If you would like to know what is the sale price, you can calculate this using the following steps:

20% of $4 = 20% * 4 = 20/100 * 4 = $0.8

$4 - $0.8 = $3.2

The sale price would be $3.2.
Answer 2
Answer: if the game cost $4, and the discount is 20%, then the sales price is $0.80 because 4 × 0.2 = 0.8 

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The air popper will make 14 cups of popcorn in 21/2 minutes. The oil popper will make 16 cups of popcorn in 3 1/2 minutes. Is there a proportional relationship here?
16-5y=1-4y

PLEASE HELP FIRST GETS BRAINLIEST

Answers

i believe that this would be representative.
It is not representative because not the whole population is being included.

I am very sorry if my answer is wrong. =(

Good Luck! =D

Write the numerical expression in words two different ways. 7/ (10-3)

Answers

1) Seven divided by the difference of 10 and 3

2) A fraction where the numerator is seven, and the denominator is the difference of 10 and 3

3) Seven divided by the quantity of 3 subtracted from 10

An animal gained 4 pounds steadily over 16 years what is the unit of rate of pounds per year?

Answers

Think about it... If it gains 4 pounds in 16 years, how many does it grow in 1 year? :) See the relation? If not...

a) How would you express it growing per year? 4 pounds in 16 years... It must be 4/16!
b) To find the unit rate, the numerator MUST BE 1. What can you do to 4 to get to 1? You can divide by 4!
c) Of course, whatever you do to one side of the fraction, you HAVE to do to the other. That means you have to divide the 4 in the equation by 4 AND the 16 in the equation by 4. You should get 1/4, because 4/4 is 1 and 16/4 is 4.
d) Wow! That means your unit rate is 1 pound per 4 years, or 1/4!

TIP:
 Try thinking of the division sign / as 'per'. Instead of the unit rate being thought of as 1/4, think of it as 1 per 4 years. :)

I'm so confused can someone help me with number 4

Answers

Ok so first with a you have 
a=2 b=5 c=7
and the problems are 2a+10 and 2b+c
Well to do this we are going to right 2a+10 as 2*a+10
So now lets replace a.
and since a=2 we have 2*2+10
2*2=4+10=14
So A is 14
and now for be we have 2b+c
Lets re-write it as 2*b+c
and now replace
2*5+7
2*5=10+7=17
b is 17.
Now with the next (4)
For a it is x=7
Subtract 3x from both sides.
Subtract 5 from both sides.
x=7
and for B
x=3
Subtract 3x from both sides.
Add 10 to both sides.
Divide both sides by 4.
x=3
Hope this helps!

How many ml of a 20% acid mixture and a 80% acid mixture should be mixed to get 120ml of a 35% acid mixture?

Answers

Answer:

Volume of Mixture A =90 ml

Volume of Mixture B =30 ml

Step-by-step explanation:

Let say, Mixture A + Mixture B = Mixture C

Volume of Mixture A is x

Volume of Mixture B is y

So, Volume of Mixture C is x+y = 120 ml

Now, Acid contain in Mixture A is 20% =0.2x

Acid contain in Mixture B is 80% =0.8y

Also, Acid contain in Mixture C is 35% =(0.35)(x+y) = 0.35×120=42

Now, we know that,

Acid contain of Mixture A + Acid contain of Mixture B=Acid contain of Mixture C

∴ 0.2x+0.8y=42

∴ 2x+8y=420

We get two linear equations

2x+8y=420 and x+y = 120

Solving above equation...

∴ x=120-y

Replacing x value in 2x+8y=420

∴ 2(120-y)+8y=420

∴ 240-2y+8y=420

∴ 6y=180

∴ y=30

Replacing y value in any equation

∴ x=120-y=120-30=90

∴ x=90

Thus,

Volume of Mixture A is x=90 ml

Volume of Mixture B is y=30 ml

Joannie lent $200 to her sister. Four years later, her sister repaid her in full with $228. What simple annual interest rate did Joannie's sister pay? A. 3.0% B. 3.5% C. 4.0% D. 4.5%

Answers

Answer:

3.5

Step-by-step explanation:

just took the quiz
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