Elimination was used to solve a system of equations. One of the intermediate steps led to the equation 3x = 18.
Which of the following systems could have led to this equation?
2x + y = 24
- x - y = 6
x + y = 4
x - 2y = 10
3x + y = 18
- 3x - y = - 18
4x + y = 20
x - y = 2

1. sometimes

2. never true

3. sometimes

step-by-step explanation:

these are pretty self explanatory if you know what supp right and com angles are

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