Which of the following is true? xy–y–x+1 = (1+x) (1–y)
xy–y–x+1 = (x–1) (y–1)
xy–y–x+1 = (1–x) (y–1)
xy–y–x+1 = (x–1) (1–y)

plz fast

Which equations represents circles that have a diameter of 12 units and a center that lies on the y-axis? check all that apply

Write an inequality and solve each problem. for exercises 11 and 12, interpret the solution.

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?