Expressions and Number Problems

Three times the difference between a number and 7.

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Solve the following questions.
If a number is decreased by 10, the result is -21. Find the number.

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If -32 is subtracted from a number, the result is -52. Find the number.

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Five less than one half of a number is 18. Find the number.

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Six decreased by twice a number

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Nine times the sum of a number and 3

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A cell phone company charges $40 per month plus a $35 activation fee. What is the expression for the total cost for m months?

• 40 - 35m

• 40m - 35

• 40m + 35

• 40 + 35

You and four friends plan a surprise party. Each of you contributes the same amount of money m for food. What is the algebraic expression for the total amount of money contributed for food?

• 5m

• 4 + m

• 5 / m

• 4m

Mitch has 35 more bouncy balls than Rudy. Rudy has b bouncy balls. Choose the expression that shows how many bouncy balls Mitch has.

• 35 - b

• b

• 35

• b + 35

Your mom wins $100 on a scratch-off ticket. She wants to split it between you and your sisters. How much will each of you receive if there are c children?

• 100 - c

• 100 + c

• 100 ÷ c

• 100c