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djyliett [7]
3 years ago
10

Helpppppppppppppp.....

Mathematics
1 answer:
steposvetlana [31]3 years ago
6 0

Answer:

B

Step-by-step explanation:

If we understand 2 properties of isosceles trapezoids, then we can solve for x and y easily.

First, the two sides, "2x-13" and "x-3" are equal, as shown also by red line.

So, we equate them and find x first. Shown below:

2x-13=x-3\\2x-x=-3+13\\x=10

Now, another property is:

Any lower base angle is supplementary to any upper base angle. That means the angle y is supplementary to "3y-4". Supplementary means that if we add up the two angles, it will be 180 degrees. So:

y+3y-4=180\\4y=180+4\\4y=184\\y=46

From the answer choices, answer choice B is right

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