Having trouble with this graph

The area of a rectangle is 54x^9y^8 square yards.if the length of the rectangle is 6x^3y^4 yards,which expression represents the width of the rectangle in yards

The multiplicative property of equality states that for real numbers a, b, c, and d, if a = b and c = d, then ac = bd. true false

Using only the digits 5, 6, 7, 8, how many different three digit numbers can be formed if no digit is repeated in a number?