Math

#1 Postby **JonathanBelles** » Mon Apr 30, 2007 7:03 pm

I hate math:

1) logbase5 (x-1) +log base5 (x-2) - Logbase5 (x+6)= 0
A) solve for X
B) show your work

2) If 1+2i is one root of X^3 +x +10 = 0, find the other two roots.
A) show your work

3) If F(x) is a linear function and f(1)=2 and f(3)=7, find an equation for f(x) in terms of x.
A) show your work

4) (2x-5)/4 < (4-3x)/ 2.
A) solve for X
B) show your work

5) find the sum and product of the roots of the equation x^3 - 19x - 30 =0
A) show your work

This is supposed to be review from ALG1, but that was 3 years ago and I dont remember it.

Thank You in advance!

#2 Postby **vbhoutex** » Mon Apr 30, 2007 7:47 pm

3 years ago? Try 40 years ago!! Good luck!!! You're smart as a whip. You'll do fine!!

#3 Postby **JonathanBelles** » Mon Apr 30, 2007 7:48 pm

not when I have no idea where to start.

GalvestonDuck · #4 Postby **GalvestonDuck** » Mon Apr 30, 2007 8:08 pm

Remember the order for solving equations?

*snicker* @ "show your work." I remember kids who used to just jot a bunch of numbers and "X=(whatever the answer was from the back of the book)" on their papers and got credit for doing their work. Blah! Truth came out at test time.

Just remember -- study and learn the formulas and you can plug in any equation and solve it. Good luck!

Do kids still ask "When will I need this later in life?"

#5 Postby **JonathanBelles** » Mon Apr 30, 2007 8:19 pm

GD: huh?
this isnt out of a book.
there are no formulas for these
yes.

#6 Postby **MGC** » Mon Apr 30, 2007 8:39 pm

I can't remember half of yesterday let alone most of the calculus I took. I don't even bother to balance my check book.....MGC

#7 Postby **AnnularCane** » Mon Apr 30, 2007 9:04 pm

Wow. I don't remember a darn thing. :eek:

What's a logbase?

#8 Postby **JonathanBelles** » Mon Apr 30, 2007 9:13 pm

log base 5. its log subscript 5.

tropicana · #9 Postby **tropicana** » Mon Apr 30, 2007 10:38 pm

i hate math so bad.
i wouldnt even know where to start, i would have thought baout guessing, but then it syas..Show your work.
so that way to solve it is out of the question.

poor fact

GalvestonDuck · #10 Postby **GalvestonDuck** » Tue May 01, 2007 7:55 am

fact789 wrote:GD: huh?
this isnt out of a book.
there are no formulas for these
yes.

Book or not, there's still an order for solving them.

Guess I shouldn't have said "formula" though for those equations -- certain not the same context as formulas for calculus.

kevin · #11 Postby **kevin** » Tue May 01, 2007 9:30 am

Maths are hard m'kay.

Search the internet if your books don't give the necessary information. Or wait until Derek comes into the thread.

Skyhawk · #12 Postby **Skyhawk** » Tue May 01, 2007 2:59 pm

1) x = 2 + 2*sqrt(2), 2 - 2*sqrt(2)

The log's sum to zero; therefore (x-1)(x-2)/(x+6) = 1.

2) 1-2i, -2

Roots of equations with real coefficients come in complex conjugate pairs, then factor (x^2-2x+5)(x+2) = 0.

3) f(x) = 5x/2 - 1/2

f(x) = mx + b; therefore 2 = m + b and 7 = 3m + b. Solve for m and b.

4) x < 13/8

Multiply by 4 to clear fractions, then simplify.

5) product = 30
sum = 0

product = -constant term, sum = coeficient of x^2. BTW the roots are: 5, -3, -2.

I graduated from high school 45 years ago this month!

#13 Postby **alicia-w** » Tue May 01, 2007 3:19 pm

dont do his homework for him!!!!

i always asked why on earth i'd ever need math and sadly, i admit have to use it every day now.

#14 Postby **JonathanBelles** » Tue May 01, 2007 3:24 pm

It didnt help anyway, I had to turn it in with those 5 problems blank, just to get more work to do.

GalvestonDuck · #15 Postby **GalvestonDuck** » Tue May 01, 2007 3:33 pm

alicia-w wrote:dont do his homework for him!!!!

Thank you.

"Show your work" means just that -- "your" work. It wouldn't have been wise for you to turn in this thread as the "work" you did to solve the problems. Not to mention, when it came time for a test, what were you going to do?

#16 Postby **JonathanBelles** » Tue May 01, 2007 3:35 pm

This is for the exam which I am exempting.

#17 Postby **alicia-w** » Tue May 01, 2007 4:02 pm

fact789 wrote:It didnt help anyway, I had to turn it in with those 5 problems blank, just to get more work to do.

so are you exempt or not? :wink:

#18 Postby **JonathanBelles** » Tue May 01, 2007 4:02 pm

Im exepmt from the exam, not the work.

GalvestonDuck · #19 Postby **GalvestonDuck** » Tue May 01, 2007 4:31 pm

fact789 wrote:Im exepmt from the exam, not the work.

Re-read that sentence carefully and you'll get our point. :wink:

#20 Postby **JonathanBelles** » Tue May 01, 2007 4:43 pm

That means I dont have to get the work, I just have to do it.

Math

Math

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