Question

At the market, 5 light bulbs cost $9.
How much do 7 light bulbs cost?

Answer 1

`\boxed{$12.60}`
`\boxed{12.60}`

Explanation:

Hey there!

Given

5 light bulbs = $9

__________________________________________________________

9 ÷ 5 = 1.8

Each light bulb is 1.8

To check do 1.8 • 5 = 9

Now we have cost per light bulb, do

7 • 1.8

= $12.6 for 7 light bulbs

Hope this helps :)

Answer 2

$12.60

Explanation:

find unit price first

9÷5

1.8×7

12.6