# pre-calc please help!!

65,707 results

**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

**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**

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

**Pre Calc**

Simplify (n+1)!/(n-1)! Help please?

**Pre calc**

Please finish y+7=6/7x-30/7

**Pre-Calc**

Help please Find f(2) and f(a+h) when f(x)=3x^2+2x+4

**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

**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

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

Logx16=-2 how do you solve this?

**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)

**Math**

Please someone help with my pre calc question!

**Pre-Calc/Trig**

Help Please Find (fog)(2) and (f+g)(2) when f(x)= 1/x and g(x)=4x+9

**Pre-calc**

Please solve: 5sin2x + 3sinx - 1 = 0

**Pre-Calc**

Can you someone please help me with this question??? Simplify cot(x + pi)

**Pre-Calc**

cosx/(1+secx) Please help me simplify this expression.

**Pre-Calc/Trig**

Help please State the x and y-intercepts for each function. f(x)= -x^3+4x

**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.

**pre calc**

Can someone please help me f(x)=1/3 square root 1-2x and g(x)= (x-2)/x. Find and simplify (g of g)(3)/(g of f)(-24). The answer I got it -24/7 and i Am unsure If it is correct. Please show all work Thank you

**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

**PRE CALC**

please help me solve this partial-fraction decomposition! 12x-57/(x-3)(x-10)

**pre-calc**

cos x+sec x=2 if you could please show all work

**Pre-Calc**

Please help stuck on this one question Find (fog)(2) and (f+g)(2) when f(x)= 1/x and g(x)=4x+9

**Pre Calc**

In triangle ABC, b=14, c=15, and cos a= 3/5. Find a)side a b) Sin B Help please?

**Pre-Calc**

Determine the solution. x^2=|x|algebraically I have no idea how to proceed with this. Can you please help?

**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

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

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

**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

**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! :)

**Pre-Calc/Trig...**

Help me please. Solve the equation: (x-3)(x+2)=0 Enter the solution with the lowest value.

**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

**Pre calc **

Please help me proof the identity. This isn't even math to me, I can not understand it so please show all work. God bless A)1-cos2x/sin2x=tanx B) sin4x/sinx=4cosxcos2x

**Math, Pre Calc**

Given that (+-2) and i are the roots of a 4th degree polynomical, find the equation. Please help! Thank you:)

**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

**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

**Pre-Calc/Trig**

Help me please. List all possible rational zeros for the polynomial function. p(x)=3x^3-2x^2-5x-2

**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.

**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.

**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.

**Pre-calc**

Calculate the period of sin(x), tan(x), sin2(x) and tan2(x). Please explain throughly.

**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 ...

**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 am stuck solving this problem, any help please..Many thanks find all numbers x that satisfy the given equation ln(2x) ------- =2 ln(3x)

**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

**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...

**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 and 3

**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?

**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

**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!

**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

**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!!!

**pre-calc helpppp**

Evaluate the expression under the given conditions (show steps please) sin(è/2); tan è = − 5 / 12 , è in Quadrant IV

**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)

**pre-calc**

(1+tan x)^2= 2 tan x+2 please show all work

**Pre-Calc/Trig...**

Help me please. Simplify 1. √-36 2. -√-625

**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)

**Pre-Calc/Trig...**

Help me do this please. Simplify the expressions using imaginary numbers. 1. √-16 2. √-49

**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

**Pre-Calc/Trig**

Help me please, I don't understand this write using exponential notation √ 36* 3√ 64 oh and 3 is an exponent

**pre calc**

Find all solutions to the equation 2 sin^2(θ) − sin(θ) − 1 = 0. Please explain throughly. Thank you so much :)

**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?

**Pre-Calc help NOW PLEASE!!!**

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

**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?

**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?

**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

**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.

**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°

**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

**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

**pre calc help please!!!!**

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

**Pre-Calc/Trig...**

Help me please Standard form: y=x^2-2x-3 Vertex form: ??? Intercept form: ???

**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?

**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!

**Pre-Calc**

Hi, can someone please teach me how to solve this? Find the exact value of the trigonometric expression cos(89)sin(29)+sin(89)sin(29)

**Pre Calc**

How do I do this?... Sq Rt[(9*Sq Rt(3x^2))]

**pre calc**

13-5e^2x=3

**Pre Calc**

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 5 8 1 5 2 7 6 5

**pre calc**

(1/x^2-49)/(1/x+7)?

**pre-calc**

(3^-2+4^-2)^-1/2

**pre-calc**

(3^-2+4^-2)^-1/2

**Pre-Calc**

2-2

**pre calc**

g(1/2)=-(1/2)^2+7(1/2)-7

**pre calc**

The population of a Midwestern city decays exponentially. If the population decreased from 900,000 to 800,000 from 2003 to 2005, what will be the population in 2008? Please help I got 670,422 and the computer marked it round i then tried rounding it to 671000 but it was still ...

**pre-calc**

(8y2+3y-7)(3y+4)

**pre-calc**

how do i solve this w(4-w^2)=8-w^3

**Pre Calc**

the domain of g(x)=x^3-2x-1

**pre-calc**

what does this simplify to: f(x)=x/(x+4)^(1/5)-2

**pre calc**

f(x)=1/x+2 how do i solve this

**Pre-Calc**

f/g=? Given that f(x)=x^2-9 x and g(x)=x + 14

**Pre Calc**

Solve for x: |4x+6|-|2x-1|<5

**Pre Calc**

Simplify: n!-(n-1)! --------- (n-1)!

**Pre Calc**

Solve for A and B if: 1 A B ----- = --- + --- k(k+1) k k+1

**pre calc**

(4^x2)^2 mulipled by 1/(4^5x)=64

**pre calc**

simplify: 2^x X 2^y +2^x X 2^y + 2^x X 2^y + 2^x X 2^y

**Pre Calc**

ln (x^2 +x-12)=3ln2

**pre-calc**

what are the asymtopes of 2x/x-3

**Pre-calc**

Logx16=-2

**pre-calc**

3-log(x+2)=5

**Pre-Calc/Trig...**

If f(x)=1/(x+2), what is f(3+h)? A. 1/(3+h) B. 1/(h+5) C. 1/(x+2)(3+h) D. (3+h)(x+2)

**pre-calc**

how do you factor 3x^-1/2 + 4x^1/2 + x^3/2?

**pre calc**

5x+3yi=5-6i?