Answer:
The triangle sum theory, often called the triangle sum theorem, states that the sum of the angle measures in a triangle must equal 180 degrees.
Answer: X=-2 and Y=-9/2
Step-by-step explanation:
Answer:
70%
Step-by-step explanation:

Greatest Common Divisor [GCD]: 80
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Answer:
-2
Step-by-step explanation:
-7(-1)+(-9)
7+(-9)
-2
Answer:
72
Step-by-step explanation:
multiply 18 by 4,
since 100/4 is 25, and four quarters makes a dollar, multiply it by 4
18(4) = 72