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.

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

i hope this you!

30 units^2

step-by-step explanation:

area is l × w

the length is 3

and the width is 10

3 × 10= 30 units squared