Solve each equation mentally. 5/2 times x = 1

X times 7/3 =1

1 divided by 11/2 = X

7x+8y=-18, 4x-9y=-3 solve the system of equations

You can find the constant of proportionality by finding the ratio of

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)