Im so lonely and what is pie

How can you decide witch operations to use to slice a two step equation

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?

Write the expression in complete factored form. 5n_(c - 3) - n(c - 3) =