Answer:
The monthly cost is 30+0.05n if we call the number of texts n. Heather wants to keep this less than 60, so the inequality is: 30+0.05n < 60
Step-by-step explanation:
Note that we can also subtract
30 from each side: 0.05n<30 We can also divide both sides by 0.05 n < 600
This is the most useful inequality, since it tells Heather she needs to send fewer than 600 texts per month, or about 20 per day.
