Thursday

April 17, 2014

April 17, 2014

Number of results: 118,168

**Pre-Calc-Please check**

Yes!
*Tuesday, January 10, 2012 at 11:09am by drwls*

**Pre-Calc-please check**

Thank you for checking
*Wednesday, January 4, 2012 at 12:54pm by Bethany*

**Pre-Calc**

Can you show me how to find the rectangular equation of r=2costheta + 3 sin theta All I need is an example to work off I was absent today from Pre-Calc and I have homework to do and no explanation with them-Please help with this one Thank you
*Monday, October 3, 2011 at 6:33pm by Leah*

**pre-calc**

oops! don't know why I put AP Calc, it's actually pre-calc....
*Friday, September 18, 2009 at 8:52pm by muffy*

**Pre-Calc-Please check my answer**

I believe you are trying to factor the polynomial. so x^2 -4x+3 (x-1)(x-3) =0 x= 1,3
*Tuesday, September 6, 2011 at 8:12pm by ALISON*

**Pre-Calc-Please check answer**

Thank you-I see where I made the mistake Funny!! I like that!
*Thursday, December 15, 2011 at 8:44pm by Sandra*

**Pre-Calc-Please check my answer**

You did this about the most difficult way. Consider: x^2-4x-3=0 (x-1)(x-3)=0 x= 1, or 3
*Tuesday, September 6, 2011 at 8:12pm by bobpursley*

**Pre-Calc-Please check**

Number three should read p/q = not p/a Thank you for letting me know the first two are correct
*Monday, January 9, 2012 at 8:23pm by Julia*

**Pre-Calc-Please check my answer**

x^2 -4x + 3 = 0 factor (x-3)(x-1) = 0 x = 3 or x = 1 or complete the square as you tried x^2 -4 x = -3 note sign change of 3 x^2 - 4 x + 4 = -3 +4 = 1 (x-2)^2 = 1 x = 2 +/- 1 x = 1 or x = 3
*Tuesday, September 6, 2011 at 8:12pm by Damon*

**Pre-Calc-please check**

please delete last two lines-that was just my work I calculated- it shouldn't e there actual answer is 243a^5-810a^4b + 1080a^3b^2 -720a^2 b^3 + 240ab^4-32b^5
*Wednesday, January 4, 2012 at 12:54pm by Bethany*

**Pre-Calc-Please check answer**

Should be sigma sign not signma sign
*Thursday, December 15, 2011 at 8:44pm by Sandra *

**Pre-Calc-Please check**

1. is correct 2. is correct
*Monday, January 9, 2012 at 8:23pm by Ben*

**Pre-Calc-Please check my answer**

I did do it the long way-you way is much simpler Thank you all
*Tuesday, September 6, 2011 at 8:12pm by Sheila*

**Pre-Calc**

I'm stuck on a pre-calc problem. I need to find y as a function of x, where the constant c is a positive number for In(y-1)+In(y+1)= -x+c express your question as ln[(y-1)(y+1)] = -x+c change that to exponential form e^(-x+c) = (y-1)(y+1) e^(-x+c) = y^2 - 1 y^2 = e^(-x+c) + 1 ...
*Wednesday, May 9, 2007 at 12:36pm by Sarah*

**Pre-Calc-Please check my answer**

Alison, I am sure Sheila was trying to do it by completing the square. Note taking half of the coef. of x and squaring it. Factoring is too easy.
*Tuesday, September 6, 2011 at 8:12pm by Damon*

**Pre-Calc-Please check my answer**

Please help-I'm stuck really bad Thank you for any help you can provide What are the roots of the equation x^2 -4x + 3 = 0 x^2 - 4x = 3 x^2 +2(-2)x + -2^2 = -3 = -2^2 x^2 + -4x + 4 = 1 (x + -2)^2 = 1 qrt (x+-2)^2 = sqrt 1 x+-2 = plus or minus 1 therefore x=1 x=3 roots are 1 ...
*Tuesday, September 6, 2011 at 8:12pm by Sheila*

**Pre-Calc**

Please check answer and help with one of them: 1. check please car in an accident speed of car is the s, d is length of skid=30 feet f is coefficient=0.5 use formula to find s=sqaure root of 30*f*d My answer is 21.21 because I took square root of 30(0.5)(30) 2. this one is ...
*Sunday, September 18, 2011 at 2:57pm by Ellie*

**Pre-Calc**

Please check answer and help with one of them: 1. check please car in an accident speed of car is the s, d is length of skid=30 feet f is coefficient=0.5 use formula to find s=sqaure root of 30*f*d My answer is 21.21 because I took square root of 30(0.5)(30) 2. this one is ...
*Sunday, September 18, 2011 at 5:03pm by Elllie*

**Pre Calc**

please h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 6 0 2 2 5 7 6 7
*Monday, December 7, 2009 at 6:27pm by Jo*

**pre-calc help please !**

thank you !!!!
*Sunday, December 2, 2012 at 9:53pm by Monica*

**pre-calc help please !**

welcome!
*Sunday, December 2, 2012 at 9:53pm by Reiny*

**pre calc**

please help!!!!
*Friday, September 13, 2013 at 6:05pm by charlotte*

**Pre Calc**

I don't see how to do this without a calculator sin ( - pi/12) csc ( (25 pi)/12)
*Friday, November 13, 2009 at 5:52pm by Pre Calc*

**Pre Calc**

I'm obviously suppose to get - sin 2 pi ok - sin ( (24 pi)/12) I don't see how to get that though
*Friday, November 13, 2009 at 5:52pm by Pre Calc*

**Pre-calc**

your two vectors are the same, so the angle between them is 0 check your typing.
*Wednesday, May 30, 2012 at 10:16pm by Reiny*

**Pre Calc**

Simplify (n+1)!/(n-1)! Help please?
*Sunday, March 15, 2009 at 9:24pm by MW*

**Pre-Calc Help!!!!!!!!!!!!!!!!1**

can someone help me please????
*Sunday, April 15, 2012 at 9:48pm by John*

**Bobpursley - pre calc**

Bob, check my reply to your email from yesterday. It applies to this question.
*Tuesday, November 2, 2010 at 12:13pm by Reiny*

**Pre-Calc-Please check**

Is this correct? Using Rational Roots Theorem, list all possible rational root of f(x) = 2x^3 - 3x^2 + 5x+6 Possible roots are p/a = -+1, -+2, +-3, -+6. -+3/2
*Tuesday, January 10, 2012 at 11:09am by Julia*

**Pre-Calculus**

Can you show me how to find the rectangular equation: r=2cos(theta) + 3 sin (theta) All I need is an example to work off I was absent today from Pre-Calc and I have homework to do and no explanation with them-Please help with this one Thank you
*Monday, October 3, 2011 at 7:49pm by Leah*

**ap calc**

OOPS, I meant Pre-Calc not ap Calc sorry
*Saturday, October 10, 2009 at 2:45pm by MUFFY*

**Pre-Calc-please check**

Please check this for me expand (3z-2b)^5 using Binomial Theorem (a+b)^n = n on top sigma in middle k=0 to right (n/k)a^(n-k)b^k (3a-2b)^5 = 5 on top sigma in middle k=0 on bottom(5/k)(3a)^5-k(-2b)^k (5/0)(3a)^5(-2b)^0+(5/1)(3a)^4(-2b)^1 +(5/2)(3a)^3(-2b)^2 +(5/3)(3a)^2(-2b)^3...
*Wednesday, January 4, 2012 at 12:54pm by Bethany*

**Pre calc**

Please show your attempt.
*Wednesday, May 14, 2008 at 6:51pm by Damon*

**Pre-Calc**

Can someone please answer this?
*Saturday, September 10, 2011 at 2:20pm by Anonymous*

**pre-calc**

where did you ge the 7/6?
*Thursday, September 27, 2012 at 10:51pm by Ms. Sue please help!*

**Help please!! For pre-calc**

Logx16=-2 how do you solve this?
*Tuesday, December 10, 2013 at 8:47pm by Anonymous *

**pre calc trig check my work please**

not quite, but you are close (sinx + cosx)/sinx = sinx/sinx + cosx/sinx = 1 + cotx you left out the "1"
*Wednesday, October 20, 2010 at 11:32pm by Reiny*

**Pre Calc**

Please disregard, I found your answer.
*Thursday, September 10, 2009 at 8:34pm by muffy*

**PRE-CALC**

Can you please explain the x-2 and x+1, I'm not sure how you got that.
*Friday, October 16, 2009 at 10:01pm by Muffy*

**Pre calc**

Please finish y+7=6/7x-30/7
*Friday, January 25, 2013 at 12:54am by Joe*

**Math**

Please someone help with my pre calc question!
*Monday, February 11, 2013 at 9:20pm by Anthony *

**Help please!! For pre-calc**

The answer I think is wrong
*Tuesday, December 10, 2013 at 8:47pm by Anonymous *

**Pre-Calc**

"He drew the picture with the parabola at points (-6,0) (6,0) (0,36)" The point (0,6) is not on the parabola, (0,36) is. The parabola is given as: y(x)=36-x² Given the rectangle is inside the parabola and above (I think) the x-axis, we define the four corners of the ...
*Saturday, October 3, 2009 at 11:19am by MathMate*

**pre calc**

find the exact solution algebraically and check it by substituting into the orginal equation. 1. 36(1/3)^x/5=4 2. 32(1/4)^x/3=2
*Sunday, June 12, 2011 at 9:55pm by caleb*

**pre calc**

I'm not quite sure what you mean. Can you please elaborate
*Saturday, October 24, 2009 at 3:51pm by Muffy*

**pre-calc**

Do you know how to do any of the requested items? Please post what you can do for checking.
*Saturday, January 22, 2011 at 7:00pm by MathMate*

**Pre-Calc**

cosx/(1+secx) Please help me simplify this expression.
*Thursday, November 1, 2012 at 6:34pm by Gaby*

**Pre-Calc - incomplete**

no diagram. more text, please.
*Tuesday, October 1, 2013 at 12:42am by Steve*

**Pre-Calc/Calc**

Looks like C to me
*Wednesday, April 17, 2013 at 11:05am by Steve*

**pre calc**

find exact solution algebraically and check it by substituting into the original equation. 2(10^-x/3)=20 logtiny4(x-5)=-1
*Sunday, June 12, 2011 at 10:08pm by celeste *

**Pre Calc (please explain)**

How do you know that it is supposed to have an a in front?
*Sunday, November 15, 2009 at 9:30pm by Bob Dylan*

**Pre-Calc**

Can you someone please help me with this question??? Simplify cot(x + pi)
*Sunday, May 22, 2011 at 4:16pm by Emily*

**pre-calc **

cos x+sec x=2 if you could please show all work
*Tuesday, November 20, 2012 at 3:15pm by Haley*

**Help please!! For pre-calc**

A negative cant cHange to a positive without doing anything
*Tuesday, December 10, 2013 at 8:47pm by Anonymous *

**Pre-Calc-Please check**

1.Write 4+6+8+10 in sigma notation: I came up with sigma in the middle 3 on top j=0 on the bottom 2. Find the 10th term of the sequence -1/5,-1/20,-1/80 this was a geometric sequence so I said a(subscript10) = -1/5*1/4^(10-1) =-1/5*(1/4)^9 = -1/5*1/2621444 = -1/1310702
*Thursday, December 15, 2011 at 6:10pm by Sandra*

**Pre-Calc**

Determine the solution. x^2=|x|algebraically I have no idea how to proceed with this. Can you please help?
*Saturday, September 26, 2009 at 12:01pm by MUFFY*

**Math: Pre-Calc**

I don't quite follow the last three lines. Could you please explain?
*Friday, November 6, 2009 at 12:36pm by Angelina*

**pre calc**

Simplify- (x^2+2x)/(x^2-x) *I got x(x+2) for the numerator and I couldn't get the denominator, but it was wrong help please
*Tuesday, February 23, 2010 at 11:21pm by Karissa*

**Pre-calc**

Could you possibly elabarate a little on to how you got those numbers please :) thanks you!
*Monday, April 9, 2012 at 1:42pm by Maya*

**PRE-CALC still stuck**

Pre-cal? V=kT V=kr^2 I=V(1/R)
*Sunday, October 18, 2009 at 5:55pm by bobpursley*

**Pre-Calc**

pre caculates is the ansewer to above is 25545872
*Saturday, October 3, 2009 at 11:19am by Anonymous*

**pre-calc HELP PLEASE**

solve using identities for all angles (dont use multiple angle method)show work please cuz i am so confused. 2sin2x-3sinx=0
*Tuesday, April 24, 2012 at 7:01pm by Kimberly*

**pre calc**

A pre-calculus answer is -0.64 + kπ radians, where k∈ℤ.
*Monday, January 25, 2010 at 8:11pm by MathMate*

**Pre Calc**

Does this: sqrt 3x-4=(x-4)^2-3 Multiply out to: x^4-16x^3+90^2-211x+173 I then need to put it in the graphing calc and see what the roots are.
*Thursday, September 10, 2009 at 8:34pm by muffy*

**Pre Calc**

I have no idea how to do this problem I thought you would have to do something with the diagonals but not sure... The parallel sides of a trapezoid are 4 and 10 centimeters long and the oblique sides are 8 and 12 centimeters long. Fi9nd the angles and the area of the trapezoid
*Monday, October 5, 2009 at 1:43pm by Pre Calc*

**Pre Calc**

Thank you so much, i'm so stressed if its not too much trouble check out some of my other questions;)
*Tuesday, August 31, 2010 at 7:31pm by Connor*

**PRE CALC **

please help me solve this partial-fraction decomposition! 12x-57/(x-3)(x-10)
*Sunday, May 15, 2011 at 11:32pm by esora*

**Pre-Calc**

Please help me with this problem-I'm stuck (x-2)/(x+2) = (x+10)/x I'm not even sure where to start-Thanks for any help you can provide
*Sunday, September 18, 2011 at 1:34pm by Josh*

**Pre Calc**

In triangle ABC, b=14, c=15, and cos a= 3/5. Find a)side a b) Sin B Help please?
*Monday, April 13, 2009 at 9:16pm by MW*

**Math, Pre Calc**

Given that (+-2) and i are the roots of a 4th degree polynomical, find the equation. Please help! Thank you:)
*Wednesday, September 5, 2012 at 3:21pm by Nikki*

**Pre-Calc-Please check answer**

1.Write 4+6+8+10 in sigma notation: I came up with sigma in the middle 3 on top j=0 on the bottom 2n+4 to the right of the signma sign 2. Find the 10th term of the sequence -1/5,-1/20,-1/80 this was a geometric sequence so I said a(subscript10) = -1/5*1/4^(10-1) =-1/5*(1/4)^9...
*Thursday, December 15, 2011 at 8:43pm by Sandra *

**Pre-Calc-Please check answer**

1.Write 4+6+8+10 in sigma notation: I came up with sigma in the middle 3 on top j=0 on the bottom 2n+4 to the right of the signma sign 2. Find the 10th term of the sequence -1/5,-1/20,-1/80 this was a geometric sequence so I said a(subscript10) = -1/5*1/4^(10-1) =-1/5*(1/4)^9...
*Thursday, December 15, 2011 at 8:44pm by Sandra *

**Pre-Calc-Please check answer**

1. either have n=0 under the sigma, or use (2j+4) as the summand. 2. good work, but 4^9 = 262144. you have an extra 4. 1/5 * 1/262144 = 1/1310720 that dyslexia will get you every time. I noticed it right off, because no multiple of 5 ends in 2 :-) did you hear about the ...
*Thursday, December 15, 2011 at 8:44pm by Steve*

**Pre-Calc**

Can someone show me how to do this please. I am stuck. find a number x such that e^2x – 12e^x =13
*Thursday, December 9, 2010 at 1:16am by Roy*

**Pre-Calc**

Could somebody please check this for me? Dtermine whether the graph of each equation is symmetric with respect to the origin, the x-axis, the y-axis, and the line y=x or the line y=-x. I came up with the line being symmetric to the x-axis, the y-axis, and the line y=x. I'm not...
*Monday, October 8, 2007 at 2:13pm by Natalie*

**Calc or Pre calc**

I am having trouble doing this problem. I know how to do indefinate integrals, but I don't know how to do definate integrals. Can you show me how to do this. Evaluate 5 (x^3-2x)dx 2
*Wednesday, May 14, 2008 at 9:42pm by jennifer*

**Pre Calc**

lim x approaches 0 [1/x *((1/(sqrt(1+x))-1)] It will be easier to understand if you write it out.. How would I algebraically do this? (The answer is -1/2) Help please?
*Wednesday, March 18, 2009 at 8:32pm by MW*

**pre calc**

I tried a few steps and got nowhere. At that point, I simply take any angle, e.g. 44 degrees, and test it in the equation. LS was not equal to RS. check your typing
*Tuesday, February 9, 2010 at 7:00pm by Reiny*

**Pre-Calc**

Ok so far Don't let the fractions scare you 1/1.7 - 1/2.3 = 1/x .15345 = 1/x , take reciprocal of both sides, (flip it) 1/.15345 = x/1 x = 6.5 check: 1/2.3 + 1/6.5 = .5886 1/1.7 = .2882 (close enough)
*Sunday, December 6, 2009 at 9:49pm by Reiny*

**Calculus grade 12 exam review PLEASE HELP ASAP !!**

THANK U! to be honest i really hate calculus and i didnt really pay attention in the course. im going into kin (of arts) so its a pre-req but i wont be taking any math or calc courses in university, i dont know why its a pre req then. but thanks u so much
*Thursday, June 21, 2012 at 3:52pm by Sarah Berkley Adamson*

**Pre-Calc-Please check I'm desperate**

Please check my answers I really need to do my homeowrk!;This are polar coordinates we're studying-I'm almost positive the first two are correct. 1.Which of the folowing is another representation of (-3,pi)? (3,120degree) (3,0 degree)I think it is this one?? ((-3,0 degree) 2....
*Tuesday, September 27, 2011 at 9:20pm by Jonathan*

**Pre-Calc/TrigPlease check this answer I redid**

x^2 -4x + 3 = 0 x^2 - 4x = 3 x^2 +2(-2)x + -2^2 = -3 = -2^2 x^2 + -4x + 4 = 1 (x + -2)^2 = 1 qrt (x+-2)^2 = sqrt 1 x+-2 = plus or minus 1 therefore x=1 x=3 roots are 1 and 3
*Tuesday, September 6, 2011 at 5:05pm by Sheila*

**pre calc trig check my work please**

sin x + cos x -------------- = ? sin x sin x cos x ----- + ----- = sin x sin x cos x/sin x = cot x this is what i got, the problem is we have a match the expression to the equation work sheet and this is not one of the answers. need to figure out what im doing wrong so i can ...
*Wednesday, October 20, 2010 at 11:32pm by Anna*

**Math**

It is math, i take a pre-calc/calc class. sorry!
*Sunday, September 28, 2008 at 4:49pm by sam*

**Pre-Calc-Please check my answer-I think its correc**

Could someone please check these-I had tried one last night but it was really wrong so I'm been working-hopefully these are correct. What are the roots of the equation and answers have to be simplified 2x^2 + 5x-10 =0 2x^2 + 5x-10+10=0+10 2x^2 + 5x = 10 2x^2 + 5x/2 = 10/2 2x^2...
*Wednesday, September 7, 2011 at 1:47pm by Sheila*

**pre-calc**

(1+tan x)^2= 2 tan x+2 please show all work
*Tuesday, November 20, 2012 at 3:20pm by Haley*

**Pre-Calc**

check your typing, is this the way you wanted it to look like ? Don't try to form fractions instead place numerator and denominatr within brackets and use / to show the division bar. e.g. (4x -9)/(x^2+6x-7)
*Wednesday, November 27, 2013 at 9:15pm by Reiny*

**PRE CALC PLEASE HELP!!!!!!!!**

find the solutions of the equation that are in the interval [0,2pi) 2-cos^2x=4sin^2(1/2x)
*Thursday, November 4, 2010 at 11:15pm by Hayli*

**Pre-Calc**

I am seeking help with this problem Please...Thank you! Find the point on the line y=x+3 in the xy-plane that is closest to the point (3, 2)
*Tuesday, December 7, 2010 at 8:55pm by Roy*

**pre calc**

area of triangle XYZ given:side z=11 side x=7 and side y=13 what are the angles and area please? please explain
*Thursday, December 8, 2011 at 5:07pm by jim*

**Algebra II-Please check calc**

1) yes 2) yes
*Wednesday, April 6, 2011 at 11:13am by bobpursley*

**Pre Calc**

sigh...sorry I'm so lost...we are not actually going over this know in school, this is just a practice problem, so yeah if you could please explain again? thnaks
*Thursday, December 17, 2009 at 7:51pm by jake*

**pre calc**

since you are asking about trig functions, it would be logical to assume that you can find the definitions. csc A = 1/sinA if that's difficult, please review your algebra I.
*Thursday, January 12, 2012 at 8:02pm by Steve*

**pre-calc helpppp**

Evaluate the expression under the given conditions (show steps please) sin(è/2); tan è = − 5 / 12 , è in Quadrant IV
*Saturday, April 21, 2012 at 7:42pm by John*

**Pre-Calc-reiny please recheck**

Thank you for showing me the second one-just one question-is #1 correct the way I did it? Thank you
*Sunday, September 18, 2011 at 5:03pm by Elllie*

**pre calc trig check my work please**

I do not see why you changed the + into a ÷, namely: from: sin x cos x ----- + ----- = sin x sin x (which I see as sin/sin+cos/sin) But sin x/sin x = 1, and cos x/sin x = cot x so the sum is 1 + cot x.
*Wednesday, October 20, 2010 at 11:32pm by MathMate*

**Pre Calc**

My denominators in the checks should have been 11 not 10, so ... let's test it: if t = 2.9 F = 300sin(5pi/11)(-1.1) + 500 = 200 ..... Check! if t=5.1 F = 300sin(5pi/11)(1.1) + 500 = 800 .... Check!!!! (I committed a typo, then cut and pasted that typo)
*Sunday, December 6, 2009 at 11:17pm by Reiny*

**Pre-calc/Calc**

Looks like D to me. sin u + sin v = 2 sin(½(u+v)) cos(½(u−v))
*Wednesday, April 17, 2013 at 11:12am by Steve*

**Pre-Calc-Please check my answer-I think I have it**

Could someone please check these-I had tried one last night but it was really wrong so I'm been working-hopefully these are correct. What are the roots of the equation and answers have to be simplified 2x^2 + 5x-10 =0 2x^2 + 5x-10+10=0+10 2x^2 + 5x = 10 2x^2 + 5x/2 = 10/2 2x^2...
*Wednesday, September 7, 2011 at 4:07pm by Sheila*

**Pre-Calc-Please check my answer-I think I have it**

Could someone please check these-I had tried one last night but it was really wrong so I'm been working-hopefully these are correct. What are the roots of the equation and answers have to be simplified 2x^2 + 5x-10 =0 2x^2 + 5x-10+10=0+10 2x^2 + 5x = 10 2x^2 + 5x/2 = 10/2 2x^2...
*Wednesday, September 7, 2011 at 4:07pm by Sheila*

Pages: **1** | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>