Use algebra to prove step-by-step that 4 is a root of y=0.5(x+5)(x-4) PLEASE help me...​

Point e(−5, 3) and point d(−4, −3) are located on the grid. which measurement is closest to the distance between point e and point d in units? a) 6.1 units b) 6.3 units c) 6.5 units d) 6.7 units

What value of x is in the solution set of 4x – 12 s 16 + 8x?

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827