Wednesday
December 7, 2016

Number of results: 62,892

pre cal
does anyone take pre-cal online ?
April 16, 2012 by Mecie

pre cal
solve for x: x^(2/3)=(1/27) (2^(x)+4)/(2^x)=2 explain please
December 7, 2008 by jason

Pre-Cal
What is the domain of f/g? f(x) = x / x+1 g(x) = x^3 Please explain! Thank you
March 22, 2010 by Hannah

Pre-cal
December 13, 2012 by Isis

Science
A 50 gram ice cube is cooled to -10oC in the freezer. How many calories of heat are required to heat it until it becomes liquid water at 20oC? (The specific heat of ice is 0.5 cal/goC.) Answer A) 1250 cal. B) 4000 cal. C) 5000 cal. D) 5250 cal. Can someone please help me solve...
September 26, 2011 by Anonymous

physics
A 50 gram ice cube is cooled to -10oC in the freezer. How many calories of heat are required to heat it until it becomes liquid water at 20oC? (The specific heat of ice is 0.5 cal/goC.) Answer A) 1250 cal. B) 4000 cal. C) 5000 cal. D) 5250 cal. Can someone please help me solve...
September 26, 2011 by Allison

pre cal
please help don't understand this...Assume f(x) = 2x + 8 and g(x) = 5. What is the value of (f + g)(3)?
September 27, 2011 by random person

h(x) = 1/x-3 + 1 I know the vertical and horizontal asymptotes but I just need to know the domain. Please help. I am very confused.
March 29, 2010 by Hannah

Integrated Physics and Chemistry
The specific heat capacity of copper is 0.09 cal/g°C. How much energy is needed to flow into a 10-gram sample to change its temperature from 20°C to 21°C? A)0.009 cal B)0.09 cal C)0.9 cal D)9 cal
April 21, 2011 by Ashley!!

Identify any asymptotes of the graph. y = 1.08^5x I know that there is a horizontal asymptote but I do not know how to find it.
March 22, 2010 by Mark

Math applied/pre-cal
(-8/5)^7/4*(-8/5)^1/4=64/25 Not sure how get this answer . Could please show me the steps.
July 11, 2012 by Hannah

math
80 cal/g x 5 g 400g/cal or 400 cal/g not sure can any one help Neither. 80 cal/g x 5g = 400 cal. The unit g cancels to leave calories. x2+2x-15
December 11, 2006 by rena

pre-cal
can anyone please explain to me how to simplify this exponential expression??I got no idea...THANKS A LOT! [(-8x^6)/(y^-6)]^2/3
February 5, 2008 by Kelly

find the mid point of the line segment joining the points P1 and P2. P1 = (3,5) P2 = (-4,7)

Pre-Cal
Sin^2xcosx+4sinxcosx+3cosx=0 I'm not even sure where to start. Help please
January 28, 2016 by Yolanda

Pre-Cal
Perform the operation and write the result in standard form. (2-3i)(5i) over 2+3i Please help!! I do not understand this.
March 25, 2009 by Kim

Use the law of cosines to find the angle Q between the given vectors. v = 3i + j w = 2i - j
March 31, 2010 by Hannah

pre-cal
Find the terminal point determined by t.Please enter answer in ordered pair
June 5, 2011 by mookie

pre-cal/trig
PlEASE help me with this!! I need it as soon as possible....... cos(x-(pi/4))+sin(x-(pi/4))=1 Find the answer from 0 to 2pi. When I slove this, I got cosx+sinx=(1/ square root of 2). then I don't know what to do the rest. Please help me.
March 4, 2008 by aa

pre cal
Find f of g of h and state the exact domain. f(x) = sqrt x g(x)= e^x - 13e^x/2 + 42 h(x) = 2x I need help on this one bad! Please help!
October 5, 2011 by Anonymous

1)(1-cos^2x)(csc x) ? Is this equal to sec x? 2) Expand: log7 3 sqrt x / x^2y 3) Find and simplify: f(g) F(x) = x^2 + 2x g(x) = 2x x^2 + 2x(2x) = x^2 + 4x Is this correct?
March 15, 2010 by Hannah

Pre Cal
Let me try again, because I keep getting something different. This is the problem: ( (2x^-4y-1)(2y^4z^-1) )^-2/2yx^3z^0 Can you please help me simply this. I didn't get what you got. Thanks.
September 7, 2015 by bob

Chemistry/Physics
How much heat is required to raise the temperature of 100 g of lead 20 degrees C? The specific heat of lead is 0.0305 cal/g K. A) 51 cal B) 61 cal C) 71 cal D) 81 cal
July 13, 2015 by Domino

Pre-Calculus
I'm trying to finish up my pre-cal homework and I am stuck on 2 problems... ***determine the intervals over which the function is increasing, decreasing, or constant*** 32. f(x)=x^2-4x 33. f(x)=√x^2-1 (that's square root of x^2-1) thank you so much for the help =)
September 17, 2011 by Cristina

Pre-Calculus
I'm trying to finish up my pre-cal homework and I am stuck on 2 problems... ***determine the intervals over which the function is increasing, decreasing, or constant*** 32. f(x)=x^2-4x 33. f(x)=√x^2-1 (that's square root of x^2-1) thank you so much for the help =)
September 17, 2011 by Cristina

Find two functions f and g such that (f X g)(x) = h(x). (There are many correct answers.) h(x) = 4 / (5x + 2)^2 = My answers were: f(x) = 4 / 5x, and g(x) = 5x + 2 Please explain. These answers were wrong and I do not know how to fix them!!
March 25, 2010 by Hannah

Physics
A 150 gram golden (specific heat 0.03 cal/gram^0 C) spoon at 20^0C is placed in a cup of tea at 100^0C. The amount of heat which the spoon absorbs from the tea which is necessary to reach spoon's tempature 47^0C is a)360.4 Cal b)121.5 Cal c)78.24 Cal d)15.08 Cal e)157.5 Cal
March 5, 2015 by Vashti

Consider the function y=arcsin x. a) Use a grapging utility to complete the table. x = -1 -0.8 -0.6 -0.4 -0.2 y = ? ? ? ? ? I am not sure what to plug into the calculator to get the answer.
February 15, 2010 by Hannah

Approximate the equation's soultions in the interval (o, 2pi). If possible find the exact solutions. sin 2x sinx = cosx I do not know where to start.
March 6, 2010 by Abby

sqrt2 /10 Do I just leave this as sqrt2/10 or can I reduce it to sqrt1/5?
March 11, 2010 by Abbey

Pre-Cal
What is the domain, range, zeros, symmetry, and is it even/odd of these functions? (how can you tell, i don't remember how you get all these, refresher please) y= 1/x y=[x] y=sq rt. of x^2 -4 y=sin x y=cos x y=tan x
August 23, 2010 by Amanda

Pre Cal
what does it mean when it says describe the end behavior of f and whats that for f(x)=(x^2+x+3)/(x-1) and f(x)= 3*2^x, please explain everything, and if you use --> tell me what that means, cuz i have no clue
July 25, 2011 by Ashley

Determine the domains of (a)f and (b) f X g f(x) = 1/x g(x)= x + 3 For the domain of f I had x > 0 and for f X g I had all real numbers but this was wrong.
March 25, 2010 by Hannah

find the solutions of the equation that are in the interval [0,2pi) (a) sin2t+sint=0 (b)cost-sin2t=0
November 4, 2010 by Hayli

find the solutions of the equation that are in the interval [0,2pi) (a) sin2t+sint=0 (b)cost-sin2t=0
November 4, 2010 by Hayli

pre-cal
please help, step by step having difficulty here as well. Find the term containing x5 in the expansion of (x + 2y)^10
August 12, 2015 by James

Chemistry
Calculate S (measure of total entropy) for the following reaction at 25C and 1atm, and tell whether the entropy is increasing or decreasing. C3H8(g)+5O2(g)-> 3CO2(g)+4H2O(g) S of C3H8=64.5 cal/(mol*K) S of O2= 49 cal/(mol*K) S of CO2= 51.1 cal/(mol*K) S of H2O= 45.1 cal/(...
November 16, 2009 by Christina

Chemistry Help!!!!
Calculate S (measure of total entropy) for the following reaction at 25C and 1atm, and tell whether the entropy is increasing or decreasing. C3H8(g)+5O2(g)-> 3CO2(g)+4H2O(g) S of C3H8=64.5 cal/(mol*K) S of O2= 49 cal/(mol*K) S of CO2= 51.1 cal/(mol*K) S of H2O= 45.1 cal/(...
November 16, 2009 by Christina

Chemistry
Calculate S (measure of total entropy) for the following reaction at 25C and 1atm, and tell whether the entropy is increasing or decreasing. C3H8(g)+5O2(g)-> 3CO2(g)+4H2O(g) S of C3H8=64.5 cal/(mol*K) S of O2= 49 cal/(mol*K) S of CO2= 51.1 cal/(mol*K) S of H2O= 45.1 cal/(...
November 16, 2009 by Christina

Pre cal
)a function f is defined as f(x) = 3*2^x describe the end behavior of f, please describe in detail how you got the answer and explain your abbreviations.
July 25, 2011 by Ashley

Chemistry
How much heat is released when 10 g of steam at 100°C is cooled to 10 g of liquid water at 100°C? I am working on a practice test and the answer is not in the back of the book. Can some one help me. 1. 10 cal 2. 5400 cal 3. 800 cal 4. 6200 cal
November 10, 2011 by nan

1) Use the half-angle formulas to determine the exact values of the sine, cosine, and tangent of the angle. 67 degrees 30'
March 8, 2010 by Abbey

Pre cal
Fine a third degree polynomial function f(x) with real coefficients that has 4 and 2i are zeros and such that f(-1) =-50 4 21 -2i (x-4)(x-2i)(x+2i) (x-4)(x2+4) x3-16+4x-4x2 (x3-4x2+4x-16) -50=a(-1-4-4-16) -50=.25 a=2 Not understanding, please help
September 4, 2016 by Sally

solve for r There is a right triangle with the hypotenuse as r , the angle as 45 degrees and opposite side as 20. I am having a hard time finding this out. I had tan 45 = 1.61 20(1.61) = 32.4 but this is wrong.
March 23, 2010 by Hannah

pre-cal
Can someone please show me how to find an equation for the line with the given properties. Parellel to the lines 3x-y= -3; containing the point (0,0) y= (then type your answer in slope intercept form)

chemistry
How many calories are required to heat 25.0 g of platinum from 24.5 °C to 75°C (specific heat of platinum = 0.139 J/gK)? 1. 47 cal 2. 42 cal 3. 48 cal 4. 20 cal 5. 80 cal Thank you.
November 22, 2009 by Danny

Give the domain of the function and identify any vertical or horizontal asymptotes. h(x) = 1 / x - 3 + 1 I had x = 0 and y = 3. Would the domain be all numbers except 1?
March 26, 2010 by Hannah

Use synthetic division to show that x is a solution of the third-degree polynomial equation, and use the result to factor the polynomial completely. List all the real zeros of the function. x^3 - 28x - 48 = 0 Value of x = -4 Please help!!Thank you
March 27, 2010 by Abbey

solve for r There is a right triangle with the hypotenuse as r , the angle as 45 degrees and opposite side as 20. I am having a hard time finding this out. I had tan 45 = 1.61 20(1.61) = 32.4 but this is wrong.
March 23, 2010 by Abbey

Pre-Cal
xy=2 {{x^2=3+y^2}}
October 21, 2008 by Ash

Pre Cal
1 --------- 2x^2-2 --------------- 2 + x ---- ------- x+11 x^2-2x-3
January 29, 2010 by Lauren

pre cal
3(2x-1)^2 (2) (x+3)^1/2 + (2x-1)^3 (1/2) (x+3)^-1/2
February 13, 2013 by shenyce

Pre cal
ix^2-2x+i=0
March 17, 2013 by Anonymous

Pre Cal
x 2 + y 2 = 0
February 25, 2016 by Wayne

pre cal
x^2+bx+ ?=(x+ ? )^2.
July 7, 2016 by ari

pre cal
(x/x-1)-(x/x+1) -2=0
July 11, 2016 by ari

pre cal
1/(x-1)- x/(x+1)-2=0
July 11, 2016 by ari

Physics
A substance has the following properties; Boiling Point = 140 °C, Freezing Point = -10 °C, specific heat as a gas, liquid and solid, 0.3 cal/g.C°, 1.8 cal/g.C° and 0.8 cal/g.C° respectively. Heat of fusion =100 cal/g and heat of vaporization = 480 cal/g. How much heat ...
November 27, 2016 by Clarity

pre-cal
A "super ball" dropped from a height of x feet bounces to a height y that is 80% of x. Can anyone please teach me how to find its numerical, algebraic, and graphical representations? Thanks a lot!!!
March 1, 2008 by Lusi

Pre-Cal
1) use the half-angle formulas to determine the exact values of the sine, cosine, and tangent of the angle. 67 degrees and 30' Please explain!! I do not know how to start.
March 1, 2010 by Janet

college (Physical Science/Physics)
I am having difficulty with this equation. I have been working with it for several weeks! Please Help. the equation is this: solve for Lf Lf=[(CwMw+CsMs+CcMc)(To-Tf)//Mi-CwTf values Cw=1.00; Mw=143.4; Cs=0.11; Ms=30.0; Cc=0.22; Mc=57.7;To=23.9; Tf=14.2;Mi=16.7 I keep comming ...
April 17, 2009 by Jennifer

Pre-Cal
Find two functions f and g such that (f X g)(x) = h(x). (There are many correct answers.) h(x) = 4 / (5x + 2)^2 = My answers were: f(x) = 4 / 5x, and g(x) = 5x + 2 Please explain. These answers were wrong and I do not know how to fix them!!
March 25, 2010 by Hannah

pre - cal
12-5y^2 what's the question?
August 20, 2007 by Anonymous

Pre-Cal
What are bearings??
February 5, 2008 by Daisy M.

pre cal
what is the sum of e or 1n
January 11, 2009 by ash

Pre Cal
Solve for x 2^x=8^x-3
December 22, 2009 by Raina

pre cal
solve for x 8x-(2x-1)=3x-10
February 1, 2010 by deonte

Pre Cal
What is the inverse of g(x)= 1/2(x-1)^3-4
October 25, 2010 by Katie

pre cal
(y^2)^-4y^8 simplify
August 30, 2012 by jennifer

Pre-Cal.
How does this go from x^2+ to 2i, explain.
January 8, 2013 by phyllys

Pre-Cal
tan-1=43\9.3
May 1, 2013 by Anonymous

Pre-Cal
2y=cos(4(t-6))+6
April 22, 2014 by Anonymous

pre cal
f(x) = 3x + 5, g(x) = 6x^2 Find (fg)(x)
June 23, 2014 by Jorgeeee

Pre cal
sin55=12/b what is b
April 7, 2016 by Sam

given f(x) = { 2x^2 + 5 x < or equal to 2 3 - x^2 x > 2 find lim f(x) x -> 2^+ lim f(x) x -> 2^- lim f(x) x -> 2
October 1, 2016 by Jessie

Use logarithms to solve the given equation. (Round the answer to four decimal places.) 6(1.02^3x + 1) = 11 How do i find the answer after 1.03^3x +1 = (11/6) Do i put a log on 1.03 or do I do something else Thank you.
February 28, 2012 by Ann

Chemistry
Which of the following is the correct unit for specific heat? degree C*** Cal cal/g cal/(g*deg C)
May 16, 2016 by Ben

Science -- Check my Answer Plz
How much heat (calories) must be applied to a 100 mL beaker filled with boiling water in order to vaporize the water? ** A) 540 cal ** B) 540 * 10^4 cal C) 800 cal D) 8000 cal Is A correct? or cud it be B.?
January 4, 2016 by Saisir le Jour

pre-cal
find the value(s) of x for which f(x)=g(x). f(x)=x^4-2x^2,g(x)=2x^2
August 28, 2007 by Kira

Pre-Cal (again)
If: f(x)= 3/x^2-1 g(x)= x+1 What is the domain of f, g, and f o g?
September 20, 2008 by Crystal

pre cal
What would cos2theta=-1/2 be???
November 15, 2008 by becca

Pre-Cal
Find f X g 3 sqrt of x+1 X x^3+1
February 26, 2009 by Dan

Pre-Cal
Simplify e^3ln2-1
January 9, 2010 by jamie

pre-cal
(576^1/2+512^1/3)^1/3
May 31, 2010 by Soto

pre-cal
tan((theta/2)+(pi/6))=-1
July 2, 2011 by vince

Pre Cal
simplify the quotient: [x(5x+1)-3(x^2+1)]/ [(x-1)^2]
July 24, 2011 by Ashley

Pre Cal
cos^2+tan^2=1
March 25, 2012 by Trevion

Pre Cal
cos 75 deg
April 9, 2012 by Kara

pre cal
7tan^2(pheta)-2=3
June 28, 2012 by Maria

pre-cal
f(x)=((6xy^3)^1/2)((30x^4y^6)^1/2)/(5x^-7y^4)^1/2
August 30, 2012 by Anonymous

Pre Cal
f(x) = log3(93 x + 3 815 x + 3)
October 2, 2012 by Sally

pre-cal
find the intercepts of y=2x-4

Pre-Cal.
f(x)=x^3-3x^2+x-12 =x^2(x-3)+4(x-3) =x^2+4) (x-3) so if f(x) = 0 at x = 3,+/- 2i. what is the f(x) factored form
January 6, 2013 by phyllys

pre cal
July 11, 2016 by ari

Find (a) f X g , (b) g X f, and (c) f X f f(x) = 3sqrt x-1 g(x) = x^3 + 1 For the f(x) the 3 is little above the sqrt sign. my answers were: (a) = 3sqrt x^4 -1 (b) = x^4 -1 (c) = 6sqrt x+1 These answers are wrong but I do not know how to do this.
March 25, 2010 by Hannah

Pre-cal/Trig
(tan/(1+sec)) + ((1+sec)/tan) = 2csc (Show all work please.)
February 21, 2011 by Katherine

math
How many hours of jogging at 5 1/2mi/h would be needed for a 200 pound person to lose 5 pounds and it takes 3500 cal for one pound 740 cal/h for jogging 5 1/2 mi/h Please post your answer, and we'll be glad to critique it. 750x3500 740x3500=2590 No, not right. If it takes ...
March 16, 2007 by patti help

Pre-cal
Please determine the following limit if they exist. If the limit doe not exist put DNE. lim 2x^3 / x^2 + 10x - 12 x->infinity. Thanks.
May 10, 2010 by Randy

Pre cal
1.Find the domain of the function algebraically y=3x-1/(x+3)(x-1) y=(1/x)+5/(x-3) 2.Find the range of the function y=10-x^2 y=(3+x^2)/(4-x^2) Please help me understand how to do them.
September 1, 2014 by Angelica

PRE-CAL
SIMPLIFY 55/SQUARE ROOT OF 20 -3
September 10, 2007 by JIM

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