Answer:
2. y = -2
3. B.
Step-by-step explanation:
PROBLEM 2:
given: 2x - 5y = 16 if x=3
solution:
substitute the given value of x into the equation as follows:
2x - 5y = 16
2(3) - 5y = 16
6 - 5y = 16
the "y" has to be alone erho you have to transfer 6 to the other side of the equation and it should look like this:
-5y = 16 - 6
-5y = 10
y = -2
PROBLEM 3:
substituting both ordered pairs into the given equation x + y = 0, the first choice would give us: 2 + (-1) ≠ 0 because there would be a difference of 1 while the second choice would give us: 1 + (-1) = 0.
