X= y2 - 1
2x - y = 4
which of the following equations could be the result of using substitution to solve the system?
2y² - y - 5 = 0
2y² - y - 6 = 0
2y² - 2y - 5 = 0

Option (2) is correct.

Step-by-step explanation:

Given two equations and

We have to choose an equation from the given options which could be the result of using substitution to solve the system.

Since the given equation is in term of y , so we make substitution of x in term of y.

From ,

⇒

Substitute    in other equation

We get,

Cross multiply we get,

Solving further, we get

Thus, option (2) is correct.

the solution is h=10 because you add 9 to each side of the equation.

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.