Question

In April, the Messa family gets 800 text messages included in their plan. Together, Tommy and Mary use half of the messages. Jack and Stefanie use 240 messages. Cathy uses the rest of the messages. Write and evaluate an expression to find the number of messages Cathy uses. Part A: Write an expression to find the number of messages Cathy uses.

Answer 1

Answer: See explanation

Explanation:

Total number of text messages = 800

Amount used by Tommy and Mary = 1/2 × 800 = 400

Number of messages uses by Jack and Stefanie = 240

The expression to find the number of messages Cathy uses will be:

= 800 - (1/2 × 800) - 240

Since the expression is 800 - (1/2 × 800) - 240, the number of messages that Cathy will use will be:

= 800 - (1/2 × 800) - 240

= 800 - 400 - 240

= 160 messages