Question

Under her cell phone plan, Janelys pays a flat cost of $46.50 per month and $5 per gigabyte. She wants to keep her bill under $70 per month. Write and solve an inequality which can be used to determine gg, the number of gigabytes Janelys can use while staying within her budget.

Answer 1

less than 4.7 gigs

Explanation:

The cost of Janelys's cell phone plan will be the sum of the flat cost and the product of the per-gig cost and the number of gigs of data she uses.

y = 46.50 +5g

She wants this to be less than $70 per month, so we can find the constraint on her data usage from ...

46.50 +5g < 70

5g < 23.50 . . . . . . . . subtract 46.50

g < 4.7 . . . . . . . . . . divide by 5

Janelys must use less than 4.7 gigs of data to stay within her budget.