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2. What is the value of y in 2x - 5y = 16 if x = 3?
3.Which of the following ordered pairs corresponds to the linear equation x + y = 0?
a. (2,-1)
b. (1,-1)​

Sagot :

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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.

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