When were the forces in the pair of pulling at right angles to each other for the values a = 2.9 which is a leg of right triangle and a value c = 4.2 which is a hypothesis find the length of the other leg be to the nearest

The Pythagorean theorem tells you the other leg is

... √(c² - a²) = √(4.2² -2.9²) = √9.23 ≈ 3.038 ≈ 3.0

There is insufficient information to do anything with forces.

each side has a different length.  

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