Please work it out and not just give me the answer or I won\'t give any points.

Question

Please work it out and not just give me the answer or I won't give any points. I have the answer key already. I just want to know how to do them.

Please work it out and not just give me the answer or I won't give any points. I have the answer key already. I just want to know how to do them.

Please work it out and not just give me the answer or I won't give any points. I have the answer key already. I just want to know how to do them.

Please work it out and not just give me the answer or I won't give any points. I have the answer key already. I just want to know how to do them.

Explanation / Answer

7.
P. 2/x + 5/y = (2y+5x)/xy
Q. (3+1/y)/x = (3y+1)/xy
R. |x| + |y| square = x^2+y^2 +2xy
Thus none are correct.
7E

8. The interval is (-,-5] U [1,)

Thus it is x <=-5 and x>=1
=> |x+3|>=2

8b

9. 190.585 - 108.56 + 279.415 - 351.44 = 712.88

9e

10. 1/(xx) = 1/x*x0.5 = 1/x1.5 = x-0.75 = Option a

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