Y = -5x + 9
y = 5x + 7
5x + 7 = -5x + 9
5x + 5x = 9 - 7
10x = 2
x = 2/10 reduces to 1/5
y = 5x + 7
y = 5(1/5) + 7
y = 1 + 7
y = 8
solution is (1/5,8)
Answer:
18
Step-by-step explanation:
Yur Welcome
The problem is an example of systems of linear equation with 3 variables.
In order for us to get the solutions, we need to use Elimination.
(1) Add the two equations to get z
-x-2y+4z=-15
x+2y-5z=17
--------------------
-z = 2
z = -2
Then lets multiply <span>2x+y-z=7 </span> by 2
--> 4x + 2y - 2z = 14
Then add it -x-2y+4z=-15
4x + 2y - 2z = 14
-x-2y+4z=-15
-----------------
-3x + 2z = -1
Substitute z to that equation
-3x + 2(-2) = -1
-3x - 4 = -1
-3x = 3
x = 1
Then, using this equation <span>2x+y-z=7, substitute z and x
</span>2(1) + y -(-2) = 7
2 + y +2 = 7
y = 7 -4
y = 3
So, the final answer is <span>B.(1,3,-2)</span>
The equation of the graphed parabola is y=a
-4.
Given that parabola is plotted, concave up , with vertex located at coordinates (-3,-4).
We are required to find the equation of the graphed parabola.
The equation of a quadratic function of vertex (h,k) is given by:
y=a
+k
In the above equation a is the leading coefficient.
We have been given point (-3,-4).
We have to just put the value of h=-3 and k=-4 and the required equation will be as under:
y=a
-4
Hence the equation of the parabola which is plotted, concave up, with vertex located at coordinates (-3,-4) is y=a
-4.
Learn more about parabola at brainly.com/question/64712
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