Answer:
Step-by-step explanation:
When rotating a point 90 degrees counterclockwise about the origin our point A(x,y) becomes A'(-y,x). In other words, switch x and y and make y negative.
The answer is around 79, but if you want to round it, you could round it up to 80.
Answer:
A 36
Step-by-step explanation:
99-7×9
99-63
36
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