Help I'm doing a test and need a correct answer asap ! Given the function f(x) = 3x + 1, what is the value of f (-2/3) ?

Simply 8x squared + 5(7x squared- x) - 2x =

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Louis wants to carpet the rectangular floor of his basement. the basement has an area of 864 square feet. the width of the basement is 2/3 it's length. what is the length of louis's basement