Divide 90 into 3 parts in the ratio 1: 4: 5. solve for the the parts of 90.

Which matrix multiplication is possible?

Given: pqrs is a parallelogram prove: pr and qs bisect each other at t

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)