# math/calc

140,501 results

### 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 2

How would you go about integrating x^2/sqrt(4-x^2)?

### 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.

### 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' ...

### 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.

### 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 - Calc

Sketch the region R bounded by y=x+6, y=x^3, and 2y+x=0 then find its area. I know sketching is kind of difficult here, but I would appreciate any help on how to approach this problem. Thanks

### 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.