Samantha is planning to take a trip. The cost of the plane ticket is $575. She earns $15 an hour (h) and has already saved $135. Which of the following

inequalities shows the number of hours (h) Samantha could work in order to buy her ticket? Select two that apply.

A) 15h + 135 ≤ 575

B) 15h + 135 ≥ 575

C) 15h ≥ 440

D) 15h ≥ 710

The correct answer is:

B) 15h+135≥575

We can calcutate with this inequality (15h+135≥575) the minimun number necesary of hour that Samantha have to work for buy the plane ticket.

15h+135≥575

15h≥575-135

15h≥440

h≥440/15

h≥29.333 then h≥30

Samantha need work greater tan or equal to 30 hours.

To chek:

h=29 ⇒15 (29) + 135=570<575

h=30 ⇒15 (30) + 135=585>575; therefore h≥30