Question

Kiyoshi's phone plan costs $17.50 per month plus $0.15 per text message. What is the maximum number of text messages Kiyoshi can use so the phone bill is no more than $56.50?

Answer 1

She can sen a MAXIMUM of 260 texts

Step-by-step explanation

so lets start with the info we know

Her limit - $56.50

a flat rate (constant) - $17.50

and how much is cost PER text - $0.15

so we can make an inequality

56.50 ≤ .15x + 17.50

first, we would take away the constant

56.50-17.50 = 39

39 ≤ .15x

divide by .15

39/.15

leaving us with

260≤ X

Answer 2

260 text

Explanation:

First you're gonna want to subtract 17.50 form 56.50 and get 39.00 left over for text messages.

dividing 39 by .15 (
`(39)/(0.15)`) gives you 260

he can send 260 text per billing period