X2=-4 please help me find out

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

Which letters from the table represent like terms? a and b b and c a and d b and d

Desmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? \ 8,000 + 24x 8,000 - 24x 8,000 + 2x 8,000 - 2x