Question

1. Last week Patrice made (15d + 400) dollars. This

week she made (10d. So) dollars. Write an expression

that represents how much money she made

altogether over the last two weeks.

Answer 1

Answer: 25 d+ 400

Explanation:

Given, Last week Patrice made (15d + 400) dollars.

And this week she made (10 d) dollars.

Now , we need to find the expression that represents how much money she made altogether over the last two weeks, which is equal to

(Money made in last week) + (Money made in this week)

= (15d + 400)+(10 d)

= 15 d+ 400+ 10 d [ Opening Parenthesis]

= 15d+ 10d + 400 [ Commutative property]

= 25 d+ 400

i.e. The required expression = 25 d+ 400

• Commutative property of addition : a+b=b+a, where a, b are any expression.