Verified Answer :

calculista

we know that

there are \(80\) rubber bands per bag

so

by proportion

Find the number of rubber bands in \(4\) bags

\(\frac{80}{1} \frac{rubber\ bands}{bag} =\frac{x}{4} \frac{rubber\ bands}{bags}\\ \\x=80*4\\ \\x=320\ rubber\ bands\)

therefore

the answer is

\(320\ rubber\ bands\)

The number of total rubber bands he buys is 320.

Given that,

The child purchase 4 bags of rubber bands for making into the bracelets.

And, there are 80 rubber bands per bag

So, the number of total rubber bands he buys is

= 4 bags of rubber bands × 80 rubber bands per bag

= 320 rubber bands

Therefore we can conclude that the number of total rubber bands he buys is 320.

Learn more about the equation here: brainly.com/question/21105092

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