Y is inversely proportional to a cubed When a=2, y=10
a is directly proportional to x
When x=4, a=20
Find a formula for y in terms of x.
Give your answer in its simplest form.

Adepartment store purchases screen-printed t-shirts at a cost of $5 per shirt. they mark up the price 150% (making the selling price 250% of the store's purchase price) and put them on the sales floor. every month that a t-shirt doesn't sell, the store reduces the selling price by 25%.

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?