Simplify the expression to a polynomial in standard form: (4x+5)(x^2-x-4) (4x+5)(x 2 −x−4)

The perimeter of a triangle is 69 cm. the first is 5 cm shorter than the second side. the third side is twice as long the first side. find the length of each side

Bob the builder is making 480kg of cement mix. this is made by cement, sand and gravel in the ratio 1: 3: 4

Xy x xy if a and b are positive integers such that a*b=9 and b*a=72 what is the value of a/b