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3 years ago

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

Mathematics

2 answers:

svet-max [94.6K]3 years ago

6 0

9/5= 1.80
1.80x5= 9
so, each light bulb costs 1.80
1.80x7=12.6
the answer is 12.6

Nikitich [7]3 years ago

6 0

Good question!

Quoted answers are NOT Mine! All sources / further information provided:

"The answer is $12.60, because:
$9/ 5 lightbulbs is $1.80 per lightbulb.
Next, you take the $1.80 per light bulb and multiply it by 7 lightbulbs."

Source / further information may be provided at:

brainly.com/question/7418849

I take NO credit for this answer. Credits reserved to @covered0209

I am only here to help, not to get into trouble. I hope you understand

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Here c represents the total number of children in choir.

As per the statement:

Total number of boys in choir = 12

It is also given that: Three sevenths of a children's choir are boys.

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By cross multiply we have;

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