Friday
October 21, 2016

Number of results: 70,839

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
October 3, 2011 by Leah

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...
January 4, 2012 by Bethany

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 ...
September 6, 2011 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 ...
May 9, 2007 by Sarah

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 ...
September 18, 2011 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 ...
September 18, 2011 by Elllie

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...
September 7, 2011 by Sheila

Pre-calc/Trig...
which of the following are quadratic functions? check all that apply 1. y=2x^2-3x+7 2. y=3x-4 3. y=(5x-3x^2)/4+1 4. y=x-x^3
October 8, 2014 by Anonymous

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
June 12, 2011 by caleb

Pre-Calc/Trig...
Which of the following could be an example of a function with a domain (-oo,oo) and a range (-oo,2)? Check all that apply. A. y= -(3)^x+2 B. y= -(3)^x-2 C. y= -(0.25)^x+2 D/ y= -(0.25)^x-2
December 9, 2014 by Anonymous

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
December 15, 2011 by Sandra

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...
September 7, 2011 by Sheila

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...
September 7, 2011 by Sheila

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

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
January 10, 2012 by Julia

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
December 7, 2009 by Jo

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...
December 15, 2011 by Sandra

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...
December 15, 2011 by Sandra

Pre-Calc/Trig...
Which of the following quadratic functions has a graph that opens downwards? check all that apply A. y=2x^2-9x+3 B. y=x^2+4x+8 C. y=-(5+2x^2) D. y=60x-15x^2
October 9, 2014 by Anonymous

Pre Calc
March 15, 2009 by MW

Pre calc
January 25, 2013 by Joe

Pre-Calc
Help please Find f(2) and f(a+h) when f(x)=3x^2+2x+4
September 27, 2014 by Anonymous

Pre-Calc
help please For f(x)=3x+1 and g(x)=x^2-6 find (f-g)(x) A. x^2-3x-7 B. 7+3x-x^2 C. 3x^2-17 D. -x^2+3x-5
September 29, 2014 by Anonymous

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
October 3, 2011 by Leah

Logx16=-2 how do you solve this?
December 10, 2013 by Anonymous

Please check these simplified expressions(my answer is after the ;) 4(2k-6)-8(3-3k); -16k-(-48) 9+(-2k)+(-4)-6k; -8k+5 -x+4x-(-8x)-9+2x+1; 13x+(-8) 5(-3x+6)+8x; -7x+30 8+6x+4-8x; -2x+12 5(-m-3)+4m-10; -9m+5
May 18, 2008 by Jillian

Pre-Calc/Calc
Which set of parametric equations corresponds to this rectangular equation? y=2x-(x^2 / 10) A. x=4t, y=4t-(t^2 /10) B. x=2t, y=8t-(4t^2/10) C. x=2t, y=4t-(4t^2/10) D. x=.5t, y=2t-(t^2/10) E. x=t, y=t-(t^2/10)
April 17, 2013 by Chris Math Hw Help

Math
Please someone help with my pre calc question!
February 11, 2013 by Anthony

Pre-Calc/Trig
Help Please Find (fog)(2) and (f+g)(2) when f(x)= 1/x and g(x)=4x+9
September 28, 2014 by Anonymous

Pre-calc
Please solve: 5sin2x + 3sinx - 1 = 0
January 10, 2016 by Jim

Pre-Calc
Can someone check this? Thanks! :) Which pair(s) of functions are inverses? There may be more than one correct answer. a.) f(x) = x - 12, g(x) = x + 12 b.) f(x) = 3x, g(x) = 1/3x c.) f(x) = 4x, g(x) = -4x d.) f(x) = 2x + 1, g(x) = 2x - 1 My answer: A & C
September 30, 2014 by Sofia

Pre-Calc
May 22, 2011 by Emily

Pre-Calc
November 1, 2012 by Gaby

Pre-Calc/Trig
Help please State the x and y-intercepts for each function. f(x)= -x^3+4x
November 10, 2014 by Anonymous

I have three questions: 1. What is the remainder of (x^3 + 2x^2 - 5x+4) /(x-3) I think the answer is 34?? 2. Evaluate (4+5i)(2+2i) =4(2) +4(2i) + 5i(2) + 5i(2i) = 8 + 8i + 10i+10i^2(-1) =-2 + 18i 3. Using Rational Roots Theorem, list all possible rational root of f(x) = 2x^3...
January 9, 2012 by Julia

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.
September 10, 2009 by muffy

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
February 23, 2010 by Karissa

PRE CALC
May 15, 2011 by esora

pre-calc
cos x+sec x=2 if you could please show all work
November 20, 2012 by Haley

Pre-Calc
September 28, 2014 by Anonymous

Pre-Calc
Solve the quadratic equation by factoring. Check your solutions in the original equation. (Enter your answers as a comma-separated list.) x^2 + 2ax + a^2 = 0
February 11, 2016 by Katie

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....
September 27, 2011 by Jonathan

Pre Calc
In triangle ABC, b=14, c=15, and cos a= 3/5. Find a)side a b) Sin B Help please?
April 13, 2009 by MW

Pre-Calc
Determine the solution. x^2=|x|algebraically I have no idea how to proceed with this. Can you please help?
September 26, 2009 by MUFFY

Pre-Calc
September 18, 2011 by Josh

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...
October 8, 2007 by Natalie

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

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
December 9, 2010 by Roy

Pre-Calc
I have to solve these using matrices by hand. Can someone please help me? 2x-3y-2z=4 (1/4)x-(2/5)y+(3/4)z=(-1/3) -2x+1.3y-3z=5 Thank you so much! :)
December 3, 2012 by Tori

Pre-Calc/Trig...
Help me please. Solve the equation: (x-3)(x+2)=0 Enter the solution with the lowest value.
October 16, 2014 by Anonymous

Given the differential equation: dy/dx = y(1+x), y(0)=1, Use Euler's method with step size .1 to approximate y(.3). ... please check this for me! no one has responded to this question yet.. thanks. y' = y(1+x), y'(0) = 1(1+0)=1 ->the solution has slope 1 at the point (0,1...
July 2, 2007 by COFFEE

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

Math, Pre Calc
Given that (+-2) and i are the roots of a 4th degree polynomical, find the equation. Please help! Thank you:)
September 5, 2012 by Nikki

Pre-Calc/Trig
Helpp please State the domain and range of each of the following functions: 1. f(x)=1/(x+3) 2. g(x)=√x+6 3. h(x)=x^3+2x+5
September 28, 2014 by Anonymous

Pre-Calc/Trig...
Help me please Is the given linear expression a factor of the polynomial? Show work. f(x)=2x^3+x^2-5x+2; x+2
October 31, 2014 by Anonymous

Pre-Calc/Trig
Help me please. List all possible rational zeros for the polynomial function. p(x)=3x^3-2x^2-5x-2
November 7, 2014 by Anonymous

Pre-Calc
What are the asymptotes of the hyperbola (x+1)^2/4 - (y-2)^2/1 =1 I'm homeschooled, so the concept is hard to grasp. Show steps please.
March 6, 2015 by Julissa

Pre-Calc.
What are the vertices of the hyperbola x^2/9 - y^2/4=1 I'm not sure of how to start or what equation to use. Show steps please.
March 6, 2015 by Julissa

pre-calc
Solve for t if 0<t<2pi Note: both are less than or equal to . Please help!! I am not sure what I should do.
October 20, 2016 by Mary

Pre-Calc
This is the last question on my pre-calc homework, I looked through the textbook and have no idea how to do this. Use the Law of Sines to solve for all possible triangles that satisfy the given conditions. (If an answer does not exist, enter DNE. Round your answers to one ...
March 5, 2015 by Cat Jones

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 ...
October 20, 2010 by Anna

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
May 14, 2008 by jennifer

Pre-Calc
I am stuck solving this problem, any help please..Many thanks find all numbers x that satisfy the given equation ln(2x) ------- =2 ln(3x)
December 9, 2010 by Roy

Pre-Calc/Trig
Go over this with me please, I forgot how to do it. Solve the polynomial equation. 15x^3-119x^2-10x+16=0
November 17, 2014 by Anonymous

Math - Studying for Pre Calc exam!
Approximate the solutions (to three decimal places) of the given equation in the interval (- pi/2, pi/2) 6 sin 2x − 8 cos x + 9 sin x = 6 Can you help with this please? I am studying for my Pre Calculus 1 exam and am stuck on this question...! The answer options are a. x...
July 12, 2016 by Lottie

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?
March 18, 2009 by MW

Pre-trig/Calc
Please help me. Use Descartes' rule of signs to describe the roots for each polynomial function. 3. m(x)=x^3+3x^2-18x-40
November 9, 2014 by Anonymous

pre calc
write the form of the partial decomposition for the given rational expression. Don't solve for constants: 8x+10/x^2+7x-18 please show work!
May 12, 2011 by esora

Pre-Calc
Please help me solve these two equations!! Divide and express as a polynomial: 12a^8b^5 - 9a^14b^15 + 6a^6b^10 _____________________________________ 3a^2b^5 Simplify: a/b - b/a __________ a-b/b
November 27, 2013 by Maggie

Pre-Calc P lease check
Please check my answers; 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.Which is not a representation of (5,150 degree) (-5,-30 degree)I think it is this one? (-5,330 degree) (5,510 degree) 3....
September 27, 2011 by Jonathan

Pre-Calc
For the triangle shown, find the length AD. (Assume u = 18, v = 18, x = 10°, and y = 10°. Round your answer to two decimal places.) Show work please!!!
April 2, 2012 by Mike

pre-calc helpppp
Evaluate the expression under the given conditions (show steps please) sin(è/2); tan è = − 5 / 12 , è in Quadrant IV
April 21, 2012 by John

Pre-Calc
Help solving this please. I am unsure how to do it? Determine the domain of the following functions, write answer using interval notation. P( x )=log2(3x-8)
April 23, 2016 by Juniper

pre-calc
(1+tan x)^2= 2 tan x+2 please show all work
November 20, 2012 by Haley

Pre-Calc/Trig...
Help me please. Simplify 1. √-36 2. -√-625
October 17, 2014 by Anonymous

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)
December 7, 2010 by Roy

Pre-Calc/Trig...
Help me do this please. Simplify the expressions using imaginary numbers. 1. √-16 2. √-49
October 15, 2014 by Anonymous

Pre-Calc
I know about Descartes Rule but I don't really get how to figure this out-Please check my answers- I don't get this one find number of possible positive and negative real roots of f(x) = x^4-x^3+2x^2 + x-5 I think there are 3 sign changes so there are 3 positive but I get ...
September 12, 2011 by Jaclyn

Pre-Calc
I'm so stuck-this stuff is so far above me right now-Please help (3x^3-5^2+6x-9)/(x+5) or can someone direct me to a site that can solve this and show the steps-I don't even know where to start Thank you
September 9, 2011 by Jonah

calc: avg value
Find the average value of the function "f(x) = x^2 sqrt(1+x^3)" on the interval [0,2]. and this is what i did.. please check for mistakes. thanks :D f(x) = x^2 sqrt(1+x^3), [0,2] f ave = (1/(b-a))*inegral of a to b for: f(x) dx f ave = (1/(2-0))*integral of 0 to 2 for: x^2 ...
July 2, 2007 by COFFEE

Pre-Calc/Trig
Help me please, I don't understand this write using exponential notation √ 36* 3√ 64 oh and 3 is an exponent
November 24, 2014 by Anonymous

Pre-Calc
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...
September 7, 2011 by Sheila

Please check: 1.Find polar equation of x^2 + y^2 = 10y subbed r^2 for x^2 + y^2 and sin(theta sin for y =r^2=10sin(theta) 2. y=5 r=5/sin 3. x^2+y^2 =x^2 + y^2 =2x+3y
October 5, 2011 by Tonya

Pre Calc
find the magnitude and direction angle of the vector v, v=-2i+5j please help i have no idea how to do this. could you show me step by step?
June 2, 2010 by Nate

pre-algebra
3x + 4=19 x=5 -32=24-2f f=16 Please check.Thank you.
January 28, 2015 by marybeth

pre-algebra
3m-4=14 m=6 11=2y-15 y=13 Please check Thank you.
January 28, 2015 by marybeth

math
Hi, How do I improve my math skills? I can't calculate in my head (I.e 2x43), I would actually have to write it down to solve it. I took pre-calc, calc and didn't have problem understanding. I don't know what is wrong. what should I do?
February 27, 2015 by john

Evaluate the expression under the given conditions. tan(A+B); cosA=-1/7, A in quadrant 3, sinB=1/2, B in quadrant 2.
April 18, 2012 by Josh

PRE-CALC
Determine the domain of the following function: f(x)=sqrt x-7/x^2-5x-6 I think the domain is [7,all real numbers) Can you please tell me if this is correct?
September 21, 2009 by MUFFY

Pre-CALC
Can anyone help me with this problem step by step please... Find the area inside the ellipse in the xy-plane determined by the given equation x^2 y^2 ____ + ___ =1 10 25
December 7, 2010 by Amy

Pre-Calc Help
Evaluate the expression under the given conditions. (show work please) sin(A-B); tan A=12/5, A in quadrant 3, sinB=-3sqrt(10)/10, B in quadrant 4.
April 19, 2012 by Daniel

pre-calc helpppp
Find sin x/2, cos x/2, and tan x/2 from the given information. (show work please) thank you!!! cos x = − 4/5, 180° < x < 270°
April 21, 2012 by John

Pre-Calc
Simplify the difference quotient [f(2 + h) − f(2)]/h ; if h ≠ 0. f(x) = x2 − 3x I keep getting the answer wrong. I must be messing up my steps...Please Help
January 20, 2014 by Kerri

calc check
<<y=(1/A)*integral from a to b of: (1/2)[f(x)]^2 dx >> If that is the y value of the center of mass, I don't know why the factor (1/2) is there I also don't agree with your calculation of the x value, which should be 1/(ln 2). I agree with you that the area is ln 2...
June 29, 2007 by drwls

pre-algebra
Please check -42=4n+17n N=3.09 13+10c-4=-29 C=-3.8
February 5, 2015 by marybeth

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
December 8, 2011 by jim

given that lim f(x) = 5 x->x and lim g(x) = -7 x -> c find lim [f(x)+g(x)]^2 x-> c a. limit does not exist b. -175 c. 4 d. 245 e. -70
September 2, 2016 by lottie

Pre-Calc/Trig...
Help me please Standard form: y=x^2-2x-3 Vertex form: ??? Intercept form: ???
October 24, 2014 by Anonymous

Pre-Calc
Use the fundamental identities and appropriate algebraic operations to simplify the expression. cosx / (1+sinx) Answer: secx Can someone please assist as to how I get to the answer?
April 28, 2011 by Lizette

Pre-calc
If llull=1 and llvll=3, and the vectors maek angles of 170 degrees and 130 degrees with the x-axis respectively, find the component form of the sum of u and V. Please help thanks!
February 13, 2012 by Casandra

1. Pages:
2. 1
3. 2
4. 3
5. 4
6. 5
7. 6
8. 7
9. 8
10. 9
11. 10
12. 11
13. 12
14. 13
15. 14
16. 15
17. Next>>