Question

Bethany sells roses and petunias. The expression 3r+2.5p3r+2.5p gives the cost (in dollars) of rr roses and pp petunias. What is the cost of 77 roses and 88 petunias? \$

Answer 1

The cost of 7 roses and 8 petunias is $9001

Explanation:

We are given expression for cost as

`C=3r+2.5p^3r+2.5p`

where

r is number of roses

p is petunias

We are given

r=7

and

p=8

so, we can plug here

`C=3(7)+2.5(8)^3(7)+2.5(8)`

now, we can simplify it

and we get

`C=9001`

So,

The cost of 7 roses and 8 petunias is $9001

Answer 2

$41.

Explanation:

We have been given an expression
`3r+2.5p`, which gives the cost in dollars of r roses and p petunias.

To find the cost of 7 roses and 8 petunias we will substitute r=7 and p=8 in our given expression.

`\text{Cost of 7 roses and 8 petunias}=3* 7+2.5* 8`

`\text{Cost of 7 roses and 8 petunias}=21+20`

`\text{Cost of 7 roses and 8 petunias}=41`

Therefore, the cost of 7 roses and 8 petunias is $41.