MATHEMATICS MIDDLE SCHOOL

Describe two methods for finding the sale price of an item that is discounted 30%. which method do you prefer? Explain.

Answers

Answer 1

Answer:

Answer:

1. Find the value of the discount amount, and subtract from the original.

2. Find the value of the item after discount by using 100%-30%.

I prefer the second, as it is faster.

Step-by-step explanation:

1. Find the value of the discount amount, and subtract from the original.

Say y is the amount you pay after the discount, and x is the original price, the calculation will look like this:

The value of the discount is 30% of x, which is equal to 0.3x.

subtract that from the original value to find y:

y = x - 0.3x

2. Find the value of the item after discount by using 100%-30%.

The amount left over after subtraction thirty % is 70%

Thus,

y = 0.7 x

Answer 2

Answer: one can take the price of the item before the discount is applied and subtract that from the percentage off and get the cost of the item.

I find this is the most effective way.

another method could be if one turned the percentage into a decimal it could be subtracted from the cost of the item.

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Answers

Answer:

i may not be correct idk but i think its a because it would have to be in between 2.5 and 4.3

Step-by-step explanation:

between 2.5 and 4.3 I think

So I have a problem with a pie chart and I need to find the total amount of people surveyed using the amount of one portion of it.I cannot figure out how to do this, so I hope someone can help me. Also, I need you to explain how you got your answer because this is basically an essay question because I need to explain the steps on how I got it

Answers

42% = 210 so,
42/100=210/x
Cross multiply-
42x=21000
Divide by 42 on both sides and you get- 500

Answer:

500 Total people were surveyed

Step-by-step explanation:

All you gotta do is divide the number of football players, 210, by the percentage, 0.42. And when you divide 210 by 0.42, you get the total number of people surveyed, which was 500.

210 ÷ 0.42 = 500

Which choice is NOT a way to find 9 ÷ 4?A- 9/4 (these are fractions by the way)
B- 9 x (times) 1/4
C- 1/4 0f 9
D- 1/9 of 4
Please help me!