Question

A pet store is having a pet fish sale. Mr. Green bought three bags of pet fish for his nephews. Each bag has m mollies and one bala. He also bought one box of fish food that cost d dollars. Write an algebraic expression to represent how much he paid in all. Use the chart to answer the question.

Answer 1

An algebraic expression that represent how much Mr. Green paid in all is 3(m + 1) + d

Pet fish

The following represents the items bought

• Each bag has m mollies and 1 bala
• He bought 3 of these bags

The expression that represents the items in a bag is:

$Bag=m + 1$

He bought 3 bags.

So, the total spent on pet fish is:

$Total =3(m + 1)$

Fish food

A box costs d dollars.

This means that, the total amount Mr Green spent in the store is:

$Total =3(m + 1) + d$

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