C
For negatives the higher the number the lower it is…
-6x + 6y =6
-6x + 3y = -12
You would multiply the bottom equation by -1 to make -6x a positive so you can eliminate it.
-6x + 6y = 6
6x + -3y = 12
Eliminate -6y and add 6y to -3y as well as 6 and 12.
0 + 3y = 18
3y = 18
divide both sides by 3
y = 6
now that you know the value of y it will be easy to find x :)
Answer:
The answer for the missing side length is 16
Step-by-step explanation:
You have to use Pythagorean's Theorem 
is the hypotenuse, which is 20 in this case
is the bottom, which is 12
and you have to solve for 
So
This cancels out the exponent
That's the missing side length
Answer:
0.07?
Step-by-step explanation:
Do everything in () first so do 2+7 divided by 3 and then do 2 times 3 then minus that answer by 5 then take that answer and - it by what you got with the fraction and minus that answer by 6
