Answer:
y + 20 = 9(x + 2)
Step-by-step explanation:
The equation of a line in point- slope form is
y - b = m(x - a)
where m is the slope and (a, b) a point on the lie
Calculate m using the slope formula
m = (y₂ - y₁ ) / (x₂ - x₁ )
with (x₁, y₁ ) = (- 2, - 20) and (x₂, y₂ ) = (9, 79)
m = =
= 9
Using (a, b) = (- 2, - 20), then
y - (- 20) = 9(x - (- 2)), that is
y + 20 = 9(x + 2)
The solution for the system equations is (2 , 0 , -2).
<h3>System of Equations</h3>
A system of equations is the given term math for two or more equations with the same variables. The solution of these equations represents the point of the intersection.
You can solve a system of equations by the adding or substitution methods. In the addition method, you eliminate a variable, on the other hand, in the substitution method you replace a variable for the other. To solve this question, you will apply the addition method.
The question gives three equations:
(1) 4x−2y+z=6
(2) −2x+y=−4
(3) 3y−2z=4
You should isolate the variable x in equation (2), then you will have
. After that, you should use this variable in equation (1), see below
Equation 1 (4x−2y+z=6)
If z=-2, from equation (3), you find y, see below.
3y-2z=4
3y-2*(-2)=4
3y+4=4
3y=4-4
3y=0
y=0
If y=0, from equation (2), you find x, see below.
−2x+y=−4
-2x+0=-4
-2x=-4
x=2
Read more about solving systems equations here:
#SPJ1
Answer:
The answer would be C) x < - 2
Step-by-step explanation:
I have attached a picture that shows how the number line looks like!
