The point (2, 1) is the solution of which of the following systems of equations? a. y = −2x + 5 and y = 2x + 2 b. y = −2x + 5 and y = 2x − 2 c. y = x + 3 and y = 3x − 5 d. y = −x + 3 and y = 3x − 5

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

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?

Your company will replace the asphalt roofs on all the buildings at the factory complex shown below. the buildings have flat roofs. you charge according to the total roof area. what is this area, in square yards?