Question

It cost Allison $5.80 to send 58 text messages. How much would it cost to send 40 text messages?

Answer 1

4$

Explanation:
The ratio between the $5.80 spent for 58 text messages is $0.10. This means that each text message sent is $0.10. So you just multiply $0.10 and 40 text messages to find that it costs $4 to send 40 messages.