Which expression is equivalent to 6a + 15? a. 6(a + 5) b. 3(2a + 5) c. 3(3a + 12) d. 6(a + 12) : )

The function ƒ is defined by ƒ(x) = (x + 3)(x + 1). the graph of ƒ in the xy-plane is a parabola. which interval contains the x-coordinate of the vertex of the graph of ƒ?

Simplify -4z+2y-y+-18z a.-22z+y b.-14z+2 c.3y+22z d.y +14z

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab