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
Answer from: Quest
11.2
step-by-step explanation:
when doing tangent the tangent of the angle is equal to the opposite side from the angle over the adjacent side to the angle.
tan43 = x / 12
move 12 over by multiplying each side by 12
12tan43 = x
x = about 11.2
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