Question

Joan needs $80 for a class trip. She has $32. She can earn $8 an hour baby-sitting. If the equation below shows this relationship, how many hours must Joan work to have the money she needs?

Answer 1

Joan needs to work 6 hours in total to earn $48.

What is  unitary method?

The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value.

Joan needs $80 for a class trip

She has $32.

Every hour  she can earn = $8

So, she needs 80-32=48.

She needs to work= 48/8

= 6 hours

Hence, Joan needs to work 6 hours in total to earn $48.

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