Belmond, a brick-cutter in a kiln, cuts 84 bricks in 3 hours. find the unit rate.

This is my question~~ ( r ^ 4 - 2r ^ 3 - 23 r ^ 2 - 4r - 32)÷(r+4) ~~ i must use long division to solve it : / i was wondering if anyone world like to solve it. and if so, share step-by-step explanations! you! ❤

Use the elimination method to solve the systems of equations. choose the correct ordered pair. 7x+4y=39

Which shows the graph of the solution set of 3y – 2x > –18?