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