Since this is a quadrilateral, all angles together = 360°. The angle that is 128° is congruent to angle y, so y=128°. Angle x and y are supplementary, meaning together they equal 180°, or x+y=180°. So x=180°-y. Which means, x=180°-128°=52°.

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3 years ago

Algebra 2! please help!

valentina_108 [34]

Answer:

Choice C)

x^2 - 2x + 4 - 12/(x+2)

$x^2 - 2x + 4 - \frac{12}{x+2}$

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Explanation:

To see how I got that answer, I have provided two attached images below. One of them shows the polynomial long division. The other shows synthetic division. Both are valid options to get to the same answer.

For each method, I used 1x^3 + 0x^2 + 0x - 4 in place of x^3 - 4 so that the proper terms could align.