Question

Question #250d4

Answer 1

18 roses would cost $37.50.

Explanation:

If we know 12 roses costs $25, and the cost is proportional to the number of roses, we can use the following equation to find the cost of 18 flowers.

`x/(18" roses") = ($25)/(12" roses")`

To isolate `x`, we can multiply both sides by 18, then solve for `x`.

`x = 18(25/12)`

`x = ((25 \times 18)/12)`

`x = 450/12` or `x = $37.50`

18 roses will cost $37.50.

Another way of doing this would be to equate how many times larger 18 is than 12.

`(18/12 = 1.5)` => 18 is 1.5 times larger than 12.

If the number of roses is proportional to the cost, then the cost will be 1.5 times larger as well.

`$25 \times 1.5 = $37.50`