Question

I need the answer for 10 and how you got the answers

Answer 1

A.
`y=(3)/(4) x` B. 25% discount

Explanation:

PART A:

For the shirt:

`y=`Sale price of the shirt=$18

`x=`Cost of the shirt=$24

Now,
`(x)/(y) =(24)/(18) =(4)/(3)`

⇒
`y=(3)/(4)x`

For the pair of shoes:

`y=`Sale price of the pair of shoes=$42

`x=`Cost of the pair of shoes=$56

Now,
`(x)/(y) =(56)/(42) =(4)/(3)`

⇒
`y=(3)/(4)x`

So, the equation that represents the sale price y of an item that costs x dollars is:
`y=(3)/(4) x`

PART B:

y=Sale price of an item

x=Cost of the item

Discount on the item
`=x-y=x-(3)/(4) x=(x)/(4)`

Percentage discount on the item
`=((x)/(4) )/(x)`×100
`=25`%