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math-calc

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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?

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?

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 ...

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 ...

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)

Calc
Can someone help me with this calc problem? lim as x->0 (tan^3 (2x))/(x^3)

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

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.

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).

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 ...

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

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 ...

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

Physics
1, A Body Of Mass 6kg Was Acted Upon By A Constant Force Of 18N. Calc Its Velocity In 5sec. 2. A Car Moving At 108km/hr Was Gradually Brought To Rest By Constant Force Of 2500N After 8sec. Calc The Decelleratio

physics -damon help
An ac source of 50v,100÷πHz is connected in series with an inductor of inductance L ad a resistor of resistance R.the current in the circuit is 2A ad p.d. across L and R are 30v ad 40v respectively 1) calc d average power dissipated 2) calc d power factor in the circuit

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 ...

math calc.
Differentiate g(x)=x^(2^1/2)+(x^3/2^1/2)+e^(2^1/2)+(2e^x)^1/2

Math-Calc AB
e^(-x/2) + xe^(-x/2) = 0 solve for x

math/calc
find y'' if x^4+y^4=16

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 ...

math pre calc
solve for x. 8^6+3x=16

Math Calc
Find the linear approximation of f(x)=ln x at x=1 where L(x)=

math (calc 2)
x+y=3 x-4=-(y-l)^2 rotate about the x-axis

math-calc
find third derivate f(x)=x/x+1

math calc
integral of : x^2 square root of (x-1)

math pre calc
gaussian elimination x+Y+Z=-2 X-y+5z+22 5x+y+z=-22

math pre calc
solve for X marticies 2 0 5 4 -1 3 =2 6 x -7

Math- Calc
Suppose f(x)= |x^(2)+2x−63|. Where is f(x) not differentiable?

math-calc
f(x)=(5x-4)e^2x How do you find the one critical number??

math 191- calc
sect + tan t= (sqr 3)

math-calc
derivate of 2sin(x)-cos(x)-cot(x)

MATH, Calc
P=0.3e^0.08t find the rate of growth.

Math
Please someone help with my pre calc question!

MATH
0.4771=x/2.303*8.14[50/323*373 calc.-x?

math calc!
find the volume of solid bound by planes x=0 y=0 z=0 and x+y+z=7

Pre Calc , Math
Find the 6 Trig ratios of -7Pie/3

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

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?

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

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

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

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

Math Pre-Calc.
find the intersection between parabola: y=x^2 + 3x - 4 and line: y=5x + 11

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

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?

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
limx->0 (3^x-6^x)/x please help here do not really know where to even start

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 ...

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

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

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

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!

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

Math-Calc
f(x)=7/(ln(x^2+5)) find f'(1) Cant seem to be getting the right answer. I believe can I get help finding the derivative.... thank you

Math - calc
Given that the graph of f(x) passes through the point (6,3) and that the slope of its tangent line at (x,f(x)) is 2x+6, what is f(5)?

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 ...

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.

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

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:)

Math-Calc
Find an equation of the tangent line to the curve 2(x2+y2)2=25(x2−y2) (a lemniscate) at the point (3,1). Please help.

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.

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' ...

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.

Calc-Math
y^2+xy-3x=-5 dy/dt=-4 x=3 y=1 find dx/dt. i tried doing 2y(dy/dt)+ydx/dt-3=0 but i am not getting the right answer. Please tell me where i am going wrong.

Calc-Math
Evaluate the limit using l'hospitals rule. lim->0 (3^x-6^x)/x. Do not know where to even begin on this one... please help.

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...

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 ...

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?

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.

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) ...

Math Calc
given the relationship 2x^2 + y^3 =10, with y > 0 and dy/dt = 3 units/min., find the value of dx/dt at the instant x = 1 unit. SUPER CONFUSED DONT GET THE EQUATION!!!!!!!

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

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!!!!!

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!

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.

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

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?

math
evaluate: cos (arc sin (4/5) - arc tan 2) with out using a calc.

Math-Calc
Suppose that f(x)=6x(3−2x)3. f(x)=6x(3−2x)3. Find an equation for the tangent line to the graph of ff at x=1x=1.

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.

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

Math AP Calc
The population of New Hampshire was 1 million in 1990. It doubles every 25 years. Estimate the population in 1996.

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

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

Calc-Math
The graphs of the function f (given in blue) and g (given in red) are plotted above. Suppose that u(x)=f(x)g(x) and v(x)=f(x)/g(x) Find each of the following:u(x) and v(x)..

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 ...

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

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

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

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!

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?

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.

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?

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.

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.

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