find the coordinates of the vertex of the following parabola algebraically. write ur answers as an (x, y) point. y=x^2+7

(0,7)

to find x = -b/2a = 0

the plug it in 0+7 = 7

Step-by-step explanation:

answer: the common difference is -0.10

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18