Multiple choice: select the best answer and click "submit."

you need to solve a system of equations. you decide to use the elimination method. which of these is not allowed?
2x – 3y = 12 equation 1
–2x + y = 8 equation 2

a. add equation 2 to equation 1.
b. multiply equation 2 by 3. then subtract the result from equation 1.
c. add the left side of equation 2 to the left side of equation 1.

The correct option is C

Step-by-step explanation:

Given two equations

2x – 3y = 12→   Equation 1

–2x + y = 8→   Equation 2

we need to solve a system of equations to use the elimination method then which option is not allowed.

As in the elimination method we have to eliminate one of the variable by making the coefficients of x and y equal. From all the three options only the option C in which the addition is only done in the left side of both equations which is not possible.

Hence, option C is not allowed.

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step-by-step explanation:

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.