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**4littlepiggiesmom**- Replies: 1

first problem:

1 /(a-b) - 3/(a+b)

________________

2/(b-a) + 4/(b+a)

I've been working on it for over week and can't get the answer of (2b-a)/(a-3b) to work out?

second probelm:

(1-8x^-3)/(x^-1 +2x^-2 +4x^-3) again a=have tried a million times and nothing loooks like the answer of x-2?

Please help I'm a back to college student after taking a 20 year break and can't remeber this stuff from before! Thanks to any and all. Heidi

thanks again!

Thanks for the help but I used the wrong number after the = sign it should read

(Sqrt)of (3/2X-5) -10=-8 so I get

(sqrt) of (3/2x-5)=2 so then I get

3/2x-5=4 then

3/2x=9 then

3x=18

x=6

Thanks a bunch for the help! K

**4littlepiggiesmom**- Replies: 4

(Sqrt)of (3/2X-5) -10=(2/5)

I keep coming up with 6 but I don't think it's the right answer......Any help would be great ! Thanks to all.....

Happy Mother's Day to all the Mother's on here!

**4littlepiggiesmom**- Replies: 1

34. (sqrt)3{5(sqrt)s +(sqrt)3} I come up with 8(sqrt)6 am I on the right track or do I need to buy a whole new train??

38 {(sqrt)c +d}{3+(sqrt)5} I get 8(sqrt)6+3d+d(sqrt)5????

Last one 14/{60 -(sqrt)578} no idea where to start even??

Any and all help would be great but I'd rather get started in the right directions over just getting the answers...thank again! A

I get this

(2x)(x+7) - (x) (3+3) = (y^2 -1)

then I get (2x^2 +14 x)(x-3x) = (y^2 -1) but then I keep getting zero on both side???? Help please!!!

**4littlepiggiesmom**- Replies: 2

1. 8/(x+4) +1 = 5x/(x^2-2x-24)

2. 2x(x+3) - x/(x+7) = (x^2-1)/(x^2+10x+21)

Any one able to show me where to start after figuring out the LDC would be my hero for the day!

The LDC for 1 is (x-6)(x+4)

and far 2 it's (x+3)(x+7) correct?

I don't know what's allowed but the easiest way would be to take 1 or more of the 8's out?

**4littlepiggiesmom**- Replies: 5

I think I;ve got these right but mom's gone for the week and dad won't even look at math over 4th grade??? So please if any one could tell me if I have these right and just tell me which are wrong so I can try firguring the ones I have wrong again! APB The instructions on 2-58 just say Simplifiy the Expression...

1.(x+3)/(x^3-x^2-6x) Divided by ((x^2-9)/ x^2+x-12)= (x+4)/ (x)(x+2)(x-3)

2. (x^3+x^2)/(x^2-16) * (x+4)/(3x^4+x^3-2x^2) = 1/(x-4)

3.(12x-4)/(x-1) + (4x)/(x-1) = 48x

4. (5)/(2x^2) + (4)/(3x) = (8x+15)/(6x^2)

5. (4)/(x+3) + (3x)/(x-2) = (3x^2+4x+1)/(x^2 +x-6) Should I simplifiy that down to (3x+1)(x+1)/(x+3)(x-2) or not???

6. (5x+1)/(x-3) - (2x)/(x-1) = (7x^2-4x-3)/(x^2-4x+3) I haven't broken it down as I can't tell if I;m suppose to?

I just gave them number 1-6 out of 56 I have done! The rest look right but these 6 I'm not sure on!

Again please just tell me if I'm right as I really want to figure them out by myself! Thanks... APB

What do the i's stand for? And if the sqrt = a negative number I thought it would's you do

**4littlepiggiesmom**- Replies: 5

T^2 -16T +65=0

I've tried the Quadratic formula

Factoring and Graphin but 65 only factors are

1 *65 and

5*13???

Any one have any ideas??? Please??? Mom's lost...and My son had left this problem after working on it for over an hour! Thanks Mom

**4littlepiggiesmom**- Replies: 2

What is the largest power k such as 3^k divides easily into 40? With out anyremainders?

a. 1

b. 4

c. 13

d. 17

e. none of these

I know a can't be right as 40 is to even of a number to be that only.

but do I use the k like tha other problem with 1/2^3, 1/2^4...and so on? Or is there another one???

**4littlepiggiesmom**- Replies: 1

What is the sum of the solutions to 4^x -3 * 2^(x+2)

a. Log underscore 2(8/3)

b. 2

c. 5

d. -5

e. none of these

We've keep coming up wth b

#2 should be this..

if a + bi is a complex number, let n[a+bi] = Sqrt (s^2 + b^2). What is n[(3+4i)^3]?

Answers

a. 625

b. 125

c. 5

d. Sqrt (91)

e. none of these

Thanks!

Thanks so much guys/gals!

**4littlepiggiesmom**- Replies: 4

I can't get the lines to work right but I think you'll know what they are....

1.For what value of X is the folloing determinant NOT equal to 0?

x+1 -2 -1

0 x-2 -2

0 0 x+3

Answer options

a. 1

b 2

c. -3

d. -1

e. none of these I came up with d

2. Compute the following determinant:

x-1 -2 -1

-1 x-2 -2

3 3 x+3

Answer options

a x^3 +3

b. x^3 + 6 x^2 - 9x + 33

c. X63 +14x +3

d. x^3 + 3

e. none of these Yes a and D are the same but I came up with c?

Thanks so much~

**4littlepiggiesmom**- Replies: 3

1. Suppose a fair coin is tossed 7 times. How many ways are there to get exactly three heads or three tails? I got B

Answer choices-

a. 7

b. 21

c. 35

d. 210

e. None of theese

2. Suppose three fair dice are thrown. What is the probabliity that the top faces will sum to 6?

a. 1

b. 1/6

c. 1/216

d. 5/108 MY ANSWER

e. Non of the these

Am I getting the right answer or do I need to redo it...again? K

**4littlepiggiesmom**- Replies: 4

My daughter had to miss math class for a music event and wants me to check her answers??? So here I am looking for help~

Find the sum of the first 100 terms of the aruthmetic sequence 19, 13 ,7,.....? We came up with b

a. -58,100

b. -556

c. _27,800

d. -55,600

e. nnone of these

**4littlepiggiesmom**- Replies: 3

My daughter had to go to music festival today so missed math test. she worked all weekend on the and asked me to look them over which I did but some of these were over my head...so I came here.

1. What is the average rate of change of f(x)=x^3-x in the interval {-2,2}?

a. 6

B. -3 THIS is her answer!

c. 3

d. 0

e. none of these

2. If a+bi is a complex number, llet {a+bi}=(sqrt)a^2+b^2. What is n[(3+4ai)^3]?

a. 625

b.125

c.5

d. (sqrt)91 which is 9

e. none of these THIS is her answer!!!

3. What is the sum of the solutions of 4^x -3 *2^x=2 + 32=0?

a. log^UNDERSCORE 2 (8/3)

b.2 THIS is her answer!

c. 5

D. -5

e. none of these

4. X+Y+Z, wher (x,y,z) is the solutionto the following linear system:

X+2Y+3Z=1

Y+2Z=2

Z=3

a. 7 This is her answer

b. 9

c.0

d. 1

e. none of these

5.Simplify the expression ln(81)+lm(27)+in(9) all over / ln(27)-ln(9) + ln (3)

a. ln(117)/lm(21)

b. 9/2

c. 7ln(3) This is here answer

d. 4.51

e. none of these

hope I wrote these so you can understand them...thanks!

Yeah I've tried that both ways but it seem easier for me?? Thanks agin! H