Use substitution to determine the solution of the system of equations.

y = −2x − 7
2y − x = 1

Consider 6x2 + 6x + 1. which term immediately tells you that this expression is not a perfect square trinomial? justify your answer

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

Val and tony get paid per project. val is paid a project fee of $44 plus $12 per hour. tony is paid a project fee of $35 plus $15 per hour. write an expression to represent how much a company will pay to hire both to work the same number of hours on a project.