Please help due in 4 hours, I'll give 5 stars, thanks and brainliest. Adding and subtracting polynomials. You don't have to do both if you dont want to just one.

What is the product? a-3/15a × 5/a-3

5. (04.07)which of the following exponential functions goes through the points (1, 12) and (2, 36)? (2 points)f(x) = 3(4)^xf(x) = 4(3)^-xf(x) = 3(4)^-xf(x) = 4(3)^x

What is the domain of the step function f(x)=[2x]-1?