Need help with this problem

Given the function f(x) = 3x + 1, evaluate f(a + 1). a. 3a + 1 b. a + 2 c. 3a + 4

Multiply −2x(6x^4−7x^2+x−5) express the answer in standard form. enter your answer in the box.

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?