Is (1, 2) a solution to the following system of equations? 2x + 9y = 20
10x +y=7

Please i have hw that need to be done. Please help.

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

Rectangle pqrs has length a and width 4b. the x-axis bisects ps and qr what are the coordinates of the vertices

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.