Add. Your answer should be an expanded polynomial in standard form.
(-5x² + 6x + 7) + (-x^2 + 4x)

1.) 2x + y = 3 2.) x - 2y = -1 if equation 1 is multiplied by 2 and then the equations are added, the result is a.3x = 2 b.3x = 5 c.5x = 5

Question b of 10which of the following describe an angle with a vertex at a? check all that applyo a. labcов. савd dooo c_baco d. zacb

Is the power produced directly proportional to the wind speed, give reasons for your answer?