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I finally made a 252! Better than a 180 average before the break! All thanks to you guys... and practice!

Help me on:
6. I did: [unparseable or potentially dangerous latex formula] and got [unparseable or potentially dangerous latex formula]. Is this right? The reason I'm asking is b/c the answers are approxed.
18.
If you don't know about them, is it smart to guess like in 25.
41.
44.
I know how to do 45, but it is VERY time consuming, so I usually skip them. And sometimes, even if you spend like 5 min or those, you still get them wrong...
47.

For 59, I know that [unparseable or potentially dangerous latex formula], but I'm a bit slow on them, can't the TI-89 do this in a sec? and should I get one to quickly do the algebraic problems?

I also always struggle on problems like 18 even though its like Algebra I.

25. I always use process of elimination to narrow it down to 2 or 3 answer choices. If you can't eliminate any, DO NOT GUESS. (I learned the hard way, stupid 298).

41. nsguy told me not to worry about these problems. Someone else can probably help you on this.

45. (R U T) Intersection (S U T). They both share the set T, so count how many elements in T and count the number of common elements between R and S.

59. I have an 89, but when I took this test I did this one by hand:

[unparseable or potentially dangerous latex formula] evaluated from -n to n.

[unparseable or potentially dangerous latex formula]