SOLUTION: Hello- My name is Jessica and I am a tutor too. I could not get these for my student. Please help and explain so I can help him. Thank you!! 1. 1/p-1/q= 1/f solve for f

Question 104508: Hello-
My name is Jessica and I am a tutor too. I could not get these for my student. Please help and explain so I can help him.
Thank you!!

1. 1/p-1/q= 1/f solve for f

2. A= (h(a+b))/2 solve for b
3. V= Q/r1- Q/R2 solve for Q
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
Ok Jessica, here we go:
1. It will simplify things a bit if we first subtract the fractions on the left side.
Now multiply both sides by f.
Now multiply both sides by the inverse of . This is the same as dividing both sides by

2. Solve for b. First, multiply both sides by 2.
Now divide both sides by h.
Finally, subtract a from both sides.

3. Solve for Q (I hope I interpreted this correctly!) First, factor the Q.
Simplify the right side.
Now multiply both sides by the inverse of

Done!

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