Classify the following triangle. Check all that apply. 60
604
60°
A. Scalene
B. Right
O C. Acute
O D. Isosceles
E. Obtuse
F. Equilateral

C. Acute

F. Equilateral

Step-by-step explanation:

Since all angles in the triangle are 60° (and less than 90°), it makes it an acute triangle.

Since all sides and angles are congruent to each other, respectively, we know that the triangle is equilateral.

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

9 x 8 divided by (5-3)=36