For the polynomial 6xy2−5x2y? +9x2 to be a trinomial with a degree of 3 after it has been fully simplified, what is the missing exponent of the y in the second term? 0 1 2 3

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Step-by-step explanation:

For the degree to be 3, the total of exponents in any given term must be 3 or less. The term containing the question mark already has an exponent of 2 on the x-variable, so the exponent of the y-variable must be 1 or less. We assume the y-variable would not be written if its exponent were zero (as in the last term), so the exponent of y must be 1.

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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'.