Question

Batteries are sold in packets and boxes.

Answer 1

The formula for P and B is 4P + 10B = 7

Given,

The number of batteries in a packet  = 4 batteries

The number of batteries in a box = 10 batteries

Sarah bought P packets and B boxes of batteries

The total number of batteries Sarah bought = 7 batteries

We have to write an expression;

Here,

4 batteries in a packet.

Sarah bought P packets of battery.

So,  she bought 4P batteries

Then,

10 batteries in a box

Sarah bought B boxes of battery

So, she bought 10B batteries

That is,

Sarah bought a total of 4P +  10B batteries which is 7 batteries

Therefore,

The formula for P and B is 4P + 10B = 7

Learn more about number of batteries here;

brainly.com/question/11666197

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