Answer:
y = 1.7
Step-by-step explanation:
Given : 5x+2y=7 and - 2x+6=9.
To find : Solve the following system of equations. Enter the y-coordinate of the solution. Round your answer to the nearest tenth.
Solution : We have given
5x + 2y = 7 --------(1)
- 2x + 6y = 9 -------(2).
To make the y coefficient same multiply the equation 1 by 3.
15 x + 6y = 21 .
(+)-2x +(-) 6y = (-)9 .
______________ ( On subtracting both the equations )
17 x + 0 = 12 .
17 x = 12 .
On dividing both sides by 17
x = .
x = 0.705
Plug x = 0.705 in equation 2 .
- 2 ( 0.705) + 6y = 9.
-1.41 + 6y = 9 .
On adding both sides by 1.41.
6y = 9 + 1.41
6 y = 10. 41
On dividing both sides by 6.
y = .
y = 1.735.
Nearest tenth = 1.7
Therefore, y = 1.7.
Answer: Choice C
Vertex = (5, -2)
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Explanation:
Vertex form is where the vertex itself is located at (h,k)
As the name implies, we can very quickly pull out the coordinates of the vertex without doing much math at all.
In the case of choice C, we have which is the same as
and we can see that h = 5 and k = -2. Therefore, the vertex is located at (h,k) = (5, -2)