(2x ^ 2 + 5x + 3) - (-7x ^ 2 + 3x - 5). Write the answer in standard form

Identify the parent function that can be used to graph the function f(x)= (1/4x)^3

This is so hard and it’s for a test

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?