You spend $30.40 on 4 CDs. Each CD costs the same amount and is on sale for 80% of the original price.

Question

You spend $30.40 on 4 CDs. Each CD costs the same amount and is on sale for 80% of the original price.

a. Write and solve an equation to find how much you spend on each CD. Let  represent the price you pay for each CD.

I just need the equation, I've figured out everything else, but i'm still told im wrong every time

Answer 1

In your problem description it left out the variable to use to represent the original price. For purposes of demonstration I am using the variable 'x'. Be sure to use the correct variable when submitting the answer.

Since we have 4 cds and the sale price is 80% of the original cost I wrote the following:

4(0.8)x = $30.40 Here the 0.8 is the decimal for of the 80%

3.2x = $30.40 Divide both sides by 3.2

x = $9.50 FINAL ANSWER