Math help please (multiple Choice)?

[ladawnshon]

What method would be best used to solve this system of equations?
y = 6
y + 3x = 9
substitution
linear regression
elimination
addition

Use elimination to solve the system of equations.
-x + 2y = 18
x + 8y = -38

(-22, -2)
(2, 2)
(14, 2)
(-2, 14)


One number is eight more than a second number. Six times the smaller number is two times the larger number. Find the two numbers.

4, 12
3, 6
2, 10
5, 20

Twice as many people passed math class than failed. The number of people who passed minus the half of the number of people who failed is 39. How many people passed and failed?

26 failed, 52 passed
12 passed, 24 failed
13 passed, 26 failed
10 passed, 20 failed

[Taco]

1. subsitution
2. (-22, -2)
3. 2,10
4. 26 failed, 52 passed