Given f(x)=3x+1, solve for x when f(x)=7.

5 country music bands and 3 rock bands are signed up to preform an all day festival. how many different orders can the bands play in if all the bands of each type must perform in a row

Danielle works as a cashier in a bookstore. she works 35 hours A week and earns $11 an hour . Each week Danielle spends $300 then she saves the rest. Danielle estimates that she earns $20,000 per year is this estimate accurate How much does she earn in a year

I need the answer to 7.32a+2.1 by (2.7-18a)

Stella needed to get her computer fixed. She took it to the repair store. The technician at the store worked on the computer for 3.25 hours and charged her $75 for parts. The total was $188.75. What was the cost of labor, per hour?