X=90 degrees you can get the answer by adding up all the angles
Hello!
In a function, each input has only one output. In A, three has two outputs, 4 and 5, so A is not a function.
In B, you can use something called the vertical line test to see if each x value has one y value as an output. You move an imaginary vertical line across the graph, and if it intersects with two points it is not a function. If we do this on our graph, it will not intersect two points. Therefore, B is a function.
In C, we can see that each input has one output, or there are all different inputs, so C is a function.
For D we can use that vertical line test again. It intersects both the points (-1,1) and (-1,6) so D is not a function
Our final answers are B and C.
I hope this helps!
Plug them in... -4=x -5=y
-3x-4+-6=6 (check)
-3x-4=12-6=6 (ordered pair works with this equation)
-2x-4+-6=-8 (check)
-2x-4=8-6=2 (ordered pair does not work with this equation)
Therefore the ordered pair IS NOT the solution.
Hope this helps :)
The formula of a midpoint SR:
![M\left(\dfrac{x_S+x_R}{2},\ \dfrac{y_S+y_R}{2}\right)](https://tex.z-dn.net/?f=M%5Cleft%28%5Cdfrac%7Bx_S%2Bx_R%7D%7B2%7D%2C%5C%20%5Cdfrac%7By_S%2By_R%7D%7B2%7D%5Cright%29)
We have
S(4, 1) and M(7, -5)
Substitute:
![\dfrac{4+x_R}{2}=7\qquad|\cdot2\\\\4+x_R=14\qquad|-4\\\\x_R=10\\\\\dfrac{1+y_R}{2}=-5\qquad|\cdot2\\\\1+y_R=-10\qquad|-1\\\\y_R=-11](https://tex.z-dn.net/?f=%5Cdfrac%7B4%2Bx_R%7D%7B2%7D%3D7%5Cqquad%7C%5Ccdot2%5C%5C%5C%5C4%2Bx_R%3D14%5Cqquad%7C-4%5C%5C%5C%5Cx_R%3D10%5C%5C%5C%5C%5Cdfrac%7B1%2By_R%7D%7B2%7D%3D-5%5Cqquad%7C%5Ccdot2%5C%5C%5C%5C1%2By_R%3D-10%5Cqquad%7C-1%5C%5C%5C%5Cy_R%3D-11)
<h3>Answer: R(10, -11)</h3>
The believe the answer is m=9.