What two numbers add up to -1 and multiply to equal 7

Which of the following represents a number squared is equal to twenty more than nine times that number ? a) x squared = 9x + 20 b) x squared = 20x + 9 c) x squared > 9 + 20x d) x squared = 9 + x + 20

The figure below shows rectangle abcd and the triangle eca on a coordinate plane. which of the following expressions represents the perimeter of triangle of triangle eca in units

Ofin . (2,4) (2,1) a. y= 2 b. x= 2 c. x= -2 d. y= 2x