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April 29, 2016

# Search: math-calc

Number of results: 119,687

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 didnt have problem understanding. I don't know what is wrong. what should I do?
February 27, 2015 by john

Math
If (a,-3) is a point on the graph of y=x^2+4x, what is the value of a? so far i have -3=x^2+4x i can do the problem on my graphing calc but we can't use a graphing calc on the test so i need to know how to do it by hand. what do i do next?
January 20, 2010 by Karen

Studying for Calc
I have a quiz on derivatives coming up and I really want to do well, but i'm not sure how to go about studying calc. i have no trouble studying for other subjects, but i'm doing poorly in calc and i need to make some changes in my study habits. any suggestions? i usually work ...
October 7, 2008 by Elizabeth

MATHS
A CONE WAS CONSTRACTED FROM PLASTIC, HAVE A HEIGHT OF 20cm (PART C). THE LID IS MADE UP OF HEMISPHERE HAVE RADIUS 0F 5cm (PART A) AND PYRAMID HAVE VOLUME OF 81,667cm³. THE LID FITS EXACTLY OVER THE CONE. A) CALC. THE VOL. OF PART A. B) CALC. THE VOL. OF PART C. C) CALC. THE ...
August 9, 2010 by MTHOMBENI BAFANA

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

Calc
Can someone help me with this calc problem? lim as x->0 (tan^3 (2x))/(x^3)
January 8, 2009 by Nick

help chem!:/
a) Calc. PH of 0.010 M HF and 0.030 M KF e) calc. PH Zn(OH)2 in wAter
March 15, 2012 by ALISON

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

calculus (limits)
lim h>0 sqrt(1+h)-1/h not sure how to factor this; not allowed to use L'Hopital's Rule. (that isn't taught at my school until Calc II & I'm in Calc I).
January 22, 2011 by John

C code
Write a .c file named calc that: - Takes arguments from the command line - Solves a simple math problem - Returns the result as an exit status calc.c: //this is the function that gets called when the executable is run. int main(int argc, char * argv[]){ //I've given you the ...
February 6, 2013 by Nick

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'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
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

chemistry
liquid heptane C7H16 is completely combusted to produce CO2 and H2O: C7H16 + 11O2 --> 7CO2 + 8H2O the heat combustion for one mole of C7H16 is -4.85*10^-3 CO2 heat of comb. = -393.5 H2O h of c= -285.8 a) calc. the vale of heat of cumbustion for C7H16 in kJ/mol a .0108 mol ...
March 10, 2010 by hilde

math calc.
Differentiate g(x)=x^(2^1/2)+(x^3/2^1/2)+e^(2^1/2)+(2e^x)^1/2
July 9, 2008 by nam

Math-Calc AB
e^(-x/2) + xe^(-x/2) = 0 solve for x
October 14, 2010 by Michelle

math/calc
find y'' if x^4+y^4=16
February 15, 2012 by angie

math pre calc
solve for x. 8^6+3x=16
March 25, 2012 by danielle

AP Calc B/C
The base of a solid is the region enclosed by y=x^3 and the x-axis on the interval [0,4]. Cross sections perpendicular to the x-axis are semicircles with diameter in the plain of the base. Write an integral that represents the volume of the solid. I drew a picture, but I ...
December 15, 2014 by Anon

Math Calc
Find the linear approximation of f(x)=ln x at x=1 where L(x)=
March 27, 2009 by Manny

math (calc 2)
x+y=3 x-4=-(y-l)^2 rotate about the x-axis
February 1, 2010 by sally

math-calc
find third derivate f(x)=x/x+1
February 27, 2011 by shakira

math calc
integral of : x^2 square root of (x-1)
May 16, 2012 by riss

math pre calc
gaussian elimination x+Y+Z=-2 X-y+5z+22 5x+y+z=-22
April 25, 2013 by JT

math pre calc
solve for X marticies 2 0 5 4 -1 3 =2 6 x -7
April 25, 2013 by JT

Math- Calc
Suppose f(x)= |x^(2)+2x−63|. Where is f(x) not differentiable?
February 9, 2016 by kim

math-calc
f(x)=(5x-4)e^2x How do you find the one critical number??
March 13, 2009 by mkcolema

math 191- calc
sect + tan t= (sqr 3)
April 12, 2010 by krista

math-calc
derivate of 2sin(x)-cos(x)-cot(x)
February 27, 2011 by shakira

MATH, Calc
P=0.3e^0.08t find the rate of growth.
September 13, 2012 by Riley

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

MATH
0.4771=x/2.303*8.14[50/323*373 calc.-x?
May 28, 2015 by tanya

math calc!
find the volume of solid bound by planes x=0 y=0 z=0 and x+y+z=7
May 9, 2010 by college

Pre Calc , Math
Find the 6 Trig ratios of -7Pie/3
January 2, 2011 by Joe Daddy

Math Calc
Find the tangent line to the curve (y-x)^2= 2y+4 at the point (2,6)
August 18, 2011 by Lalee

Math
(1/25)^1/2 i know the answer is 0.02 but how do you find it in a fraction without using a calc?
September 25, 2011 by Allie

Math: Calc: Implicit Derivatives
Find dy/dx give the relation (x^2/9)+(y^2/16)=1 Thank you!!
June 14, 2012 by Joey

Math(pre-calc)
what are all the real zeros for 1x^5+2x^4+4x^3+19x^2+9x-5?
September 27, 2012 by Danii

math/calc
gotta find the first and second derivative of f(x)=x^2/(x-1) thanks for help!
October 18, 2012 by anon

math-calc
f(x)=3-3x^2 -3 <= x <= 2 How do you find the absolute max and min value? What does x equal?
March 13, 2009 by mkcolema

Math Pre-Calc.
find the intersection between parabola: y=x^2 + 3x - 4 and line: y=5x + 11
August 23, 2009 by Soraya

math-calc
function f(x)=3x^2-2x-1 find equation of the line that is tangent and parallel to 8x-2y+12=0
February 27, 2011 by shakira

math
How do i find X in e^(0.50/x) on a scientific calc? do I use LN, and if so, could you pls tell me how I can plug it in?
May 31, 2011 by sue

Pre-Calc/Math
Prove the identit: cosxcotx+sinx=cscx

Pre-Calc/Math
If cosx= -2/3 and pi/2, find the exact value of cos(pi/3-x)

Pre-Calc/Math
Prove Identity: (1-cos2x/ tan x) = sin2x

Math- Calc
Find the volume of the solid formed by rotating the region enclosed by y=e^(4x)+2, y=0, x=0, x=0.8
October 29, 2010 by Kristina

Calc
Profit=p(-p^2+33p+9)-9(-p^2+33p+9)+100 How do I simplify this so I can take the derivative For Further Reading * Calc - Michael, Sunday, November 25, 2007 at 4:17pm Profit=p(-p^2+33p+9)-9(-p^2+33p+9)+100 p(-p^2 + 33p + 9) Just distribute the p in. -9(-p^2 + 33p + 9) Find the ...
November 25, 2007 by Ben

math
Solve the equation Vx + 7 +5=9 a) -3 b) 9 c) 23 d) 16 V= real number root aka 2nd x2 on graphing calc
March 17, 2008 by john

math calc
The equation of the tangent line to f(x) =sqrt{x} at x = 25 can be written in the form y = mx+b where m =.1 b =? i don't know how to find the value of b
March 27, 2009 by Manny

Math-alg-calc
x^(-1/7)=(1/2) Please help the example given was x^(-1/7)=(1/5) so that solved x=78,125. but i have no idea what to do thanks!
April 5, 2012 by Rochelle F

Pre-Calc/Math
Prove identity: (sec x/csc x) + (sin x/cos x)=(2/cot x)

Math ( Pre Calc)
Find all real and imaginary roots of the polynomial equation 3x^4-x^3+4x^2-2x-4=0
October 2, 2012 by Ains

Math-Calc
The lim as x goes to 0- for cos(x)/sin(x). I know the answer is negative infinity but I don't really understand why.
June 8, 2011 by Marissa

math/Calc
g(x)={1+cos(pi/2-x/1) 0 for-2 <or= x <or=2 for x<2 or x>2 is g(x) continuous at x=2 is it differentiable at x=2? ex[lain in detail I'm very confused as to how to solve this problem
February 9, 2012 by angie

Pre-Calc/Math
Given cos x=2/3 and 3pi/2<x<2pi, find the exact value of cos2x?

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

What is discrete math? And is it relatively easy?
I ask because my TA recommended taking it next semester along with calc 3. My major is electrical engineering, and I might throw actuarial science into the mix too. So yeah, lots of math.
December 18, 2007 by Jake

physics
an aeroplane is travelling horizontally at a speed of 80ms and drops a crate of emergency supplies.To avoid damage,the max vertical speed of the crate on landing is 20ms. a)calc d max height of the aeroplane when the crate is dropped b)calc d time taken for the crate to reach ...
January 19, 2012 by Shanti

math-calc
show that 1-(x/2) is the tangent line approximation to 1/sq rt(1+x) near x=0 i know the formula for apprx. is y = f(a)+f'(a)(x-a) but i don't understand how to work backwards to get this.
October 19, 2008 by joe

Calc pt2
Original question: Posted by Lost One on Tuesday, March 5, 2013 at 12:04pm. Let f(x) = (2/3)x^3 - 2x + 1 with a restricted domain of [1,infinity]. What is the value of (f-1)'(x) when x = 13? •Calc - Steve, Tuesday, March 5, 2013 at 12:58pm since x = f^-1(y) and dx/dy = 1/y' f...
March 5, 2013 by Lost One

calc
Use L’Hopital’s rule to find the limit of this sequence (n^100)/(e^n) ...If you do L'Hop. Rule it would take forever, right? You would always get an (e^n) at the bottom and will have to use the L'Hop. rule 100 times to find the limit...100*n^99, 9900n^98, and etc. Is there a ...
February 1, 2012 by lola

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

Math/calc
an electric current I , in amps is given by: I= cos(wt) + sqrt of 3 sin(wt) where w is positive constant. what are the max and minimum values of I?
March 30, 2010 by Jolly :)

Math(Pre=Calc)
The first term in a sequence of number is t1 = 4. The terms that follow are defined by the formula: tn - tn-1 = 3n -2. Determine the value of t50.
July 6, 2011 by Kate

Math- AP Calc
If 3x+xy+4y=8, what is the value of d^2y/dx^2 at the point (1,1)? My work: 3+(x)(dy/dx)+(y)+4(dy/dx)=0 dy/dx(x+4)=-3-y dy/dx=-3-y/x+4 2nd Dervative: (x+4)(0-dy/dx)-(-3-y)/(x+4)^2 (x+4)(-(-y-3/x+4))-(-3-y)/(x+4)^2 (x+4)(y+3)/(-x+4)+(y+3)/(x+4)^2 *Mult. everything by (-x+4) ...
October 6, 2014 by David

Math Pre-Calc.
Determine the domain and range of y= (radical) x-4 y= (radical) x^2-4 plz help me step by step. I just need to refreash my math, but i forgot how to find it
August 23, 2009 by Soraya

math calc
using geometry, calculate volume of solid under z= square root of 49-x^2-y^2 and over circular disk x^2+y^2 is less than or equal to 49
May 9, 2010 by college

Math
Express the following number in scientific notation: 23^941 How do i get the answer for this? on my graphing calc, i get an error overflow messasge when i try to compute it. THANK YOU!!!!!
March 11, 2012 by Sandy

Math: Calc 2
Find the volume of the solid obtained by rotating the region under the graph of the function f(x) = x^(13/12) about the x-axis over the interval [1,3]. Thanks!
July 9, 2013 by James

math- pre calc
Suppose that (x,5/13) is a point in quadrant 2 lying on the unit circle. Find x. Write the exact value, not a decimal approximation.
April 21, 2016 by Julia Hunt

Pre-Calc/Math
Use factoring, the quadratic formula, or identities to solve cos(x)+1=sin^(2)x. Find all solutions on the interval [0, 2pi)

Math Pre Calc Help
(cos^4x -sin ^4 x)/(sin^2x)=cot^2x -1 How to prove true?
November 10, 2014 by Anonymous

math
evaluate: cos (arc sin (4/5) - arc tan 2) with out using a calc.
April 15, 2010 by krista

Math: Calc
y= 3x^2+3x+2 Find the diferential dy when x=4 and dx = 0.4 and when dx = 0.8. How do I find these diferentials? y= 3x^2+3x+2 dy= 6x dx + 3dx Now put in the values, and compute.
November 16, 2006 by Katie

math (pre-calc)
Solve for x: 1. 3^2x+3^x+1-4=0 2. log3(x=12)+log3(x+4)=2 3. lnx+ln(x+2)=4 4. 3*4^x+4*2^x+8=0
April 18, 2010 by Rony

Math AP Calc
The population of New Hampshire was 1 million in 1990. It doubles every 25 years. Estimate the population in 1996.
August 29, 2010 by Leanna

Differential Calc (Math)
Stuck... can't seem to use l'hopitals, nor can I use logrithmic differentiation... lim (e^(2x)+ x)^(1/3x) x->0+ Thank you so much
December 13, 2012 by Joey

Math (Pre-Calc)
Find all the solutions of the equation in the interval {o,2pi) 5sqrt3 tan x+3=8sqrt3 tan x
February 8, 2015 by Fiona

pre calc math
need to solve the first five terms recursively. Can do the other four once I get the first one. a[n]=a[n-1]/2 and a[1]=-8
May 19, 2010 by Ken

Math- Calc
Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Then find the area of the region. y=e^(4x), y=e^(6x), x=1
October 29, 2010 by Kristina

math (pre calc)
4cot^2x-4/tanx+cosxsecx write expression in factored form as an algebraic expression of a singletrig function
April 26, 2011 by josh

math/calc
How do I solve for an area under the curve when y = x^2 and solve for above the interval (1,2) ? Any resources where I could see examples would be helpful. Thanks!
July 18, 2012 by cathy

math- pre calc/trig
Find the length of each side of a square if the diagonal is 7(square root 2)? How do I solve or set up this problem?
September 30, 2014 by jen

AP Calc
When a chain hangs under its own weight, its shape is catenary. The equation of a catenary with a vertex on the y-axis is y=e^x+e^-x. Find the length of the chain from x=-2 to x=2. Then use the same technique from Problem #8(Previous AP calc problem I posted) to find the ...
July 31, 2014 by Anon

Math (Calc)
Find the Exact value of Pi/24. I'm not sure whether to use a half-angle formula or a difference/sum of angles formula.
December 9, 2007 by Bryan

Math - Pre-Calc
So far I got it down to ((4/3)n^3+(11/6)n^2)/((4/3)n^3)+(2n^2)+(2/3)n). Would I be able to cancel out the ((4/3)n^3)s? So that it would be ((11/6)n^2)/((2n^2)+((2/3)n))? Or can I simplify that even futher by combining the (n^2)s?
April 13, 2009 by Katie

Math Calc
Given a right triangle ABC with a=13 and b=26, find the value of angle A, angle B, and side length c. Round to the nearest thousandth.
November 2, 2014 by Johnny

PLZ HELP MATH
this is pre calc arithmetic sequence. AT sea lvl pressure is 14.7 psi. It increases by 14.7 at every 30 ft descent. What is pressure at 1000 ft.
February 14, 2016 by ISOSMEXY

math, calc 2
Using the disk method, find the volume of a right circular cone with height h and base radius r. I know the answer is 1/3pier^2h, but how do you explain or work out the problem?
January 17, 2007 by George

Math Calc 1 Last question
Find the volume of the solid obtained by rotating the region bounded by the curves y=4x-x^2, y=8x-2x^2 about the line x=-2. I got 256 pi/3 but pretty sure my work is wrong.
December 12, 2012 by Anonymous

math
One of the following functions is neither odd nor even. Which one? x^5 + 3x 6x^2 – |x^2| + 3 x^9 + 3x^7 + 6x (my answer)x^2 + 3x + 3 + |x –3| This is really tricky pre-calc graphing problem. Thanks for the help!
October 1, 2012 by Anonymous

Pre-Calculus
Use the CALC features of the TI to answer the following. Show what you put into the calculator & what CALC feature you used. Round to the nearest tenths. The equation h = 20 cos (π/4 (t-3)) + 23 tells how high above the ground a ferris wheel car is at any given time. h is...
October 29, 2015 by Clarice

Calc
A student is in a 20 week calc class. The function f(t)=50-50e^0.2t f(t) measures the students problem speed in t weeks -how many problems per hour can a student solve at the beginning of the course - how many problems per hour can a student solve halfway through the course -...
July 20, 2012 by Marshall

math-calc
A rectangle is inscribed with its base on the x-axis and its upper corners on the parabola y+1-x^2. What are the dimensions of such a rectangle with the greatest possible area? width? height?
March 13, 2009 by mkcolema

math
ok so i havent done domain and ranges for a while so i need some help this is just a generic question but i want to make sure i know how to do them before starting calc so can someone please explain how i would heres a function f( t) = t+ 3 /(t2 – 5t – 66),
August 24, 2012 by kieran

Math- Calc
Suppose f(5)=5, f′(5)=5, g(5)=8, g′(5)=−8, and H(x)=f(x)e^(g(x)). Find the derivative (dH)/(dx) x=5. H′(5)= ___
February 24, 2016 by kim

math 234 calc 4 !!!!!!!!!!!
write this function in terms of heaviside functions, and then show your work in finding its laplace transform f(t)= o if o < t<3 t-3 if 3lessthan or equal <lessthan or equal to t < 6 o if 6< t < infinity
April 12, 2011 by john

Math (Calc)
Find all solutions to the following equation on the interval 0<=x<=2PI 8cos^2(X)sin^2(X) + 2cos^2(X) - 3 = 0 There are 8 solutions. If somebody could show me how to do it and not give me the answers, that would be great.
December 9, 2007 by Bryan

calc
f(x)=7x-4 a) f(0) b) f(-3) c) f(b) d) f(x-1)
October 4, 2009 by kim

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