Posted by **Amanda** on Tuesday, August 25, 2009 at 5:19pm.

Im in 9th grade algebra. and we are learning adding and subtracting real numbers. im stumped on a couple of problems. I get confused when i see the absolute value lines. Does that change the munber? Do i just go on with the problem as if they werent there?

And i have NO idea how to do 2/5 - 7/8?!?

- 9th Algebra -
**oneirocritic**, Tuesday, August 25, 2009 at 5:21pm
2/5 - 7/8

= 2*8/5*8 - 7*5/8*5

= 16/40 - 35/40

= -19/40

- 9th Algebra -
**claire**, Thursday, September 3, 2009 at 8:15pm
7/20

- 9th Algebra -
**chris**, Sunday, September 6, 2009 at 1:28am
1. find the latreal area of a cylinder of revolution if its altitude is 5.5 inches and the diameter of its base is 7 inches.

- 9th Algebra -
**Hadassah**, Wednesday, September 9, 2009 at 5:57pm
idk im in 9H soo idc either i juss need my ? answered duhhh!!!!! y else wouldi b here

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