Fill in the blank to make the expression a perfect square. u^2-16u+?

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.

Write the equations in logarithmic form 9^4=6,561