Question

Each week, Robbie earns $x mowing lawns and receives $15 as his allowance.

To find how much he will earn in total over 3 weeks, Robbie writes the following expression: x + 15 + x + 15 + x + 15

What are some other ways Robbie can write the above expression? Check all that apply.


A. 3x + 45


B. x + 15


C. 3x + 15


D. 3(x + 15)

Answer 1

A. 3x +45 and D 3(x+15)

A works because he gets payed “x” 3 times, making 3x. He gets payed $15 3 times so that makes $45.

D works because when you use the distributive property to solve you get 3x+45

Answer 2

A. 3x + 45

D. 3(x + 15)

Explanation:

x + 15 + x + 15 + x + 15 = (x + 15) + (x + 15) + x + 15) = 3(x + 15) = 3x + 45

Answer:

A. 3x + 45

D. 3(x + 15)