Question

A 6-pound watermelon cost $2.40 before a 30% discount. Which equation would allow you to find the discounted price of the watermelon?

In each equation the variable d represents the discounted price.

A).d=0.7 x $2.40
B).$2.40=0.7d
C).d=0.3 x $2.40
D).$2.40=0.3d

Answer 1

I think the answer is D because the question used "before" when asking for the equation.

Answer 2

Cost of watermelon before discount = $ 2.40

Rate of Discount = 30 %

D= Discounted price of watermelon

= 2.40 - 2.40 ×
`(30)/(100)`

= 2.40× [ 1 -
`(3)/(10)`]

= 2.40 ×
`(7)/(10)`

= 2.40 × 0.7

So, option A i.e 0.7 × $ 2.40 is discounted price of watermelon.