Without actual calculation find (25)^3-(75)^3+(50)^3

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

For each proportion find the unknown number x 1/5/8=×/15

Ametal rod needs to be 9 feet and 5.5 inches in length. the sections of the poles being used are each 1 foot and 10.5 inches long. how many 1ft 10.5in sections would be needed to complete the 9ft 5.5in metal rod? and how many inches of material will be left?