Answer:
- No
- Yes
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• Move x to the other side
7y=21-3x
• Divide by 7
y = (21-3x)/7
40 is the answer
5 x8 =40
When we reflect a point across y=x, the x and y coordinates switch out , that is (x,y) becomes (y,x) . SO for point (1,2), on reflection across y=x, (1,2) becomes (2,1) . And when we do reflection across y=-x, (x,y) becomes (-y,-x). Therefore point (2,1) on reflection across y=-x becomes(-1,-2) .
So the final answer is (-1,-2) .
