The vertices of a triangle are a(–2, 2), b(9, 0), and c(1, –4). if the triangle is a right triangle, which vertex is the right angle? a. a b. b c. c d. none, it is not a right triangle

  vertex C(1, -4) is the right angle

Step-by-step explanation:

It can be helpful to plot the points on a graph.

need more info

step-by-step explanation:

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