Please help me with 1,2,3,4 and show me how you get it the answers please I really need help can someone help me

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

If f(x) = 4x - 3 and g(x) = x + 4, find (f - g) (x)

Acube has a volume of 800 cubic inches. whatis the length of an edge of the cube, in inches? a. 23/100b. 43/50c. 83/100d. 1003/2e. 1003/8