2(4y+3)=16 i need solving for "y" using the algabreic method

If a is a nonzero real number then the reciprocal of a is

Interpret the following expression (5y^2-7)^3/(2y)^2

Aconstruction worker needs to put a rectangular window in the side of a building he knows from measuring that the top and bottom of the window have a width of 8bfeet and the sides have a length of 15 feet he also measured one diagonal to be 17 feet what is the length of the other diagonal