1/3 of a number is 4 less than 1/2 of the number, the number is

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?

1yd 1 ft = 1 1/12 1 1/3 1 1/2 1 1/6

Hurry which expression is equivalent to 3√x^5y?