Evaluate the expression for the given value of the variable(s).
-2x² + 8x – 4; x = -3

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

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

To finance her community college education, sarah takes out a loan for $2900. after a year sarah decides to pay off the interest, which is 4% of $2900. how much will she pay