Evaluate each algebraic expression when a = 4 and b = -2 ab =

2( a - b) =

2a + 4b =

Solve the system of equations. y= 2x y= x^2 - 15

Rectangle leg this 11feet and perimeter of 38feet what is the width of the rectangle in feet

Circle d circumscribes abc and abe. which statements about the triangles are true? statement i: the perpendicular bisectors of abc intersect at the same point as those of abe. statement ii: the distance from c to d is the same as the distance from d to e. statement iii: bisects cde. statement iv: the angle bisectors of abc intersect at the same point as those of abe. a. i only b. i and ii c. ii and iv d. i and iii e. iii and iv