deliawong7 deliawong7

15-11-2017
Mathematics

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

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15-11-2017

Hello!

To solve this, find the cost of a single light bulb first, by dividing 9 / 5.

9 / 5 ==> 1.80

One light bulb is $1.80

Now, multiply 1.80 by 7.

1.80 * 7 = 12.6

7 light bulbs cost $12.6

Hope this helps! ☺♥

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