For the equation 3(7 + 2) = 3x + k, what value of k will create an equation with infinitely many solutions? A)7

B)21

C)10

D)3​

7x+8y=-18, 4x-9y=-3 solve the system of equations

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?

Wanna brainliest? ! ms. mcmahon is building a shed as shown. what is the measure of the angle at the top of the shed? a) 126 b )116 c) 64 d) 32