Answer:
-25
Step-by-step explanation:
Substitute r = 2 in the equation.
-9(2) - 7 = -18 - 7 = -25
2x + y = 20 . y=3x
2x + 3x = 20
5x = 20
x/5 = 20/5
x = 4
(4,0)
2.65 + 3.78 = 6.43
B, D are equal to 6.43
please mark me as brainlest