Answer:
x=-25
Step-by-step explanation:
Inverse variation
xy =k
We know x and y
20*5 =k
100 =k
So the formula is
x y = 100
We know y = -4
x (-4) = 100
Divide each side by -4
-4x/-4 = 100/-4
x = -25
The problem is asking you to move around the vertices of points A, B, and Y. Once you do that, all you have to do is look at each angle measure and record it. Once again, the sum of all interior angles in a triangle should be 180° no matter what.
Answer:
Rather than just multiplying 5/4 with 8, she has to multiply it with 3 + 8. She could put parentheses around the 3 + 8, according to PEMDAS, this would mean that the parenthesis must be solved before multiplication. The correct answer would be:
4/5x - 8 = 3
4/5x = 3 + 8
x = (3 + 8)5/4
x = 11 x 5/4
x = 55/4 or 13.75
The right answer to 1b is 1 5/8 and the right answer to number 1e is 1 3/7. The way I solved this was by starting out adding two fractions at a time...
1b). 5/8 + 5/8 + 3/8
5/8 + 5/8 = 10/8 or 1 1/4
10/8 + 3/8 = 13/8 or 1 5/8.
1e). 5/7 + 1/7 + 4/7
5/7 + 1/7 = 6/7
6/7 + 4/7 = 10/7 or 1 3/7
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