To find the distance from a house at point A that is on one side of a river to a house at point B on the other side of a river, a surveyor walks off a distance of 100 feet to point C on the same side of the river
as point A. He then determined that the angle at point A is 40˚ and at point C is 50˚. Determine the
distance between point A and B.

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

are ya tryin to ask something or is this a statement