Sunday

August 28, 2016
Number of results: 7,161

**pre cal**

Find the angle between the vectors u and v if u=i+4j and v=−i+2j.
*July 14, 2016 by anna*

**Pre-Cal**

Use the law of cosines to find the angle of Q between the given vectors. v=3i + j w=2i - j
*March 28, 2010 by Hannah*

**pre-Cal(Please help)**

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 manitude of each vetcor, and write each vector as the sum of the unit vectors. Choose either one (2,6) or (4,-5) Thank you
*January 9, 2010 by amy*

**Pre Cal/Vectors**

Can someone show the steps involved in figuring out this type of problem? Given the magnitudes of vectors u and v and the angle Ό between them, find the magnitude of the sum u + v to the nearest tenth and the angle that the sum vector makes with u to the nearest degree. /...
*July 24, 2011 by Joe*

**pre cal**

Find the angle between the vectors u and v if u = (-1,4) v = (3,-4) a. 155.93 b. 158.58 c. 158.13 d. 155.24 e. 157.17
*July 14, 2016 by anna*

**pre cal **

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

**Integrated Physics and Chemistry**

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

**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*

**math**

given that vectors(p+2q) and (5p-4q) are orthogonal,if vectors p and q are the unit vectors,find the dot product of vectors p and q?
*January 2, 2013 by bhawani*

**math**

given that vectors(p+2q) and (5p-4q) are orthogonal,if vectors p and q are the unit vectors,find the product of vectors p and q?
*January 1, 2013 by bhawani*

**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*

**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*

**physics**

Can you help me with this one also? I know how to do it with 3 vectors but I can't seem to draw it with 4 vectors. The magnitudes of the four displacement vectors shown in the drawing are A=16.0 m, B=11.0 m, C=12.0 m, and D=26.0 m. Determine the (1) magnitude and (2) ...
*January 23, 2011 by Brittany*

**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*

**Chemistry**

How much heat is released when 10 g of steam at 100C is cooled to 10 g of liquid water at 100C? 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*

**chemistry**

How many calories are required to heat 25.0 g of platinum from 24.5 C to 75C (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*

**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**

2 vectors have same magnitude.The magnitude of the resultant vector of these 2 vectors are same as either of both vectors.What is the angle between 2 vectors?
*November 21, 2014 by Tangy*

**Math - Algebraic Vectors**

Given the vectors: u = [3, 0] v = [-1, 2] a) Express the vector w = [2, 8] as a linear combination of vectors u and v. How do I do this?
*February 13, 2008 by Anonymous*

**math**

two vectors are defined as a=2i+xj and b=i-4j. find value of x if a) the vectors are parallel b) the vectors are perpendicular
*November 21, 2010 by karla*

**math**

two vectors are defined as a=2i+xj and b=i-4j. find value of x if a) the vectors are parallel b) the vectors are perpendicular
*November 21, 2010 by karla*

**PreCalculus**

Given vectors u=7i + 3j and v = -4i + 3j, find 5u-4v in terms of unit vectors. I am just beginning the study of vectors and have this problem. Could someone help? Thanks.
*January 29, 2009 by Joanie*

**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*

**math**

if vectors a+b+c=0 and modulus of the vectors a, b and c are 3 ,5 and 7 respectively. find the angle between the vectors a and b.
*January 5, 2013 by raja*

**Calculus**

Name two sets of vectors that could be used to span a set in R^3. Show how the vectors (-1,2,0) and (3,4,0) could each be written as a linear combination of the vectors you have chosen.
*April 28, 2010 by Jackiee*

**Science**

2 vectors have same magnitude.The magnitude of the resultant vectors is same as either of both vectors.What is the angle between 2 vectors?
*November 21, 2014 by Tangy*

**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 *

**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
*October 13, 2012 by ladybug*

**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 **

quadratic equation 2x^4-5x^2+2=0
*July 11, 2016 by ari*

**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*

**Calculus and Vectors**

THE VECTORS a - 5b AND a-b ARE PERPENDICULAR. IF a AND b ARE UNIT VECTORS, THEN DETERMINE a dot b
*May 11, 2013 by Johnny*

**Math**

Let a, b, and c be unit vectors, such that a+b+c=0. Show that the angle between any two of these vectors is 120 degrees. I proved this geometrically, but now my teacher wants a proof using vectors, and I don't know what to do.
*June 7, 2016 by Katie*

**PRE-CAL**

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

**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.**

Describe the end behavior of f(x)=2x^4-5x+1: A. x-->, f(x)-->; x-->-, f(x)-->- B. x-->, f(x)-->; x-->-, f(x)--> C. x-->, f(x)-->-; x-->-, f(x)--> D. x-->, f(x)-->-; x-->-, f(x)-->-
*March 17, 2009 by Mia*

**Pre-Cal**

solve(5-x)^-3=8 teach if possibe if not, its ok Thanks
*January 10, 2010 by jamie*

**Pre-Cal**

Find the inverse of the function f(x) = 3^x+2
*March 19, 2010 by Mark*

**Pre-Cal**

Identify any asymptotes of the graph. y = 1.08^5x
*March 21, 2010 by Mark*

**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**

what about the domain of 1/x. Would it be 0?
*March 25, 2010 by Hannah*

**pre-cal**

solve this system of equation 3x-y+5z-2w=-44 x+6y+4z-w=1 5x-y+z+3w=-15 4y-z-8w=58
*May 5, 2010 by jenny*

**Pre-Cal**

Find the domain for the function f(x)=-2x^(2)-x^(2)-6x-27
*December 11, 2010 by Terri*

**pre-cal**

what is the vertex and directrix of the parabola y=-1/2x^2 + 10 - 46
*April 25, 2011 by sonia*

**pre cal**

[root2(cos2pi/11+isin2pi/11)]^4
*May 20, 2011 by joe*

**Pre Cal**

the function y= tan (x/3) has an x intercept at?
*July 24, 2011 by Ash*

**pre cal 2 **

solve the equation 4cos^2x-1=0
*July 24, 2011 by kc*

**Pre Cal**

simplify the quotient: [(x+1)^3(4x-9)-(16x+9)(x+1)^2]/[(x-6)(x+1)^3]
*July 24, 2011 by Angela*

**pre-cal**

Find B so that F(x)=-x^2+bx-75 has a maximum value of 25.
*October 24, 2011 by tracy*

**Pre-Cal**

find the value of the function k(p/q)
*December 16, 2011 by Joe*

**Pre-cal**

Does the equation x^2+x-12/x+2 have holes?
*March 21, 2012 by Monique*

**Pre-cal**

10.2 can someone show me this graph(x+2)^2/4+(y+2)^2/15=1
*April 18, 2012 by sandra*

**Pre cal**

Sec^2x=2 With 10 different answers
*June 29, 2012 by Terri*

**pre-cal**

solve the equation algebraically. 7e^x=11-e^-x
*October 9, 2012 by ladybug*

**pre-cal**

Find the real zeros of f (x)= 2x^3 + 2x^3 8x + 3
*October 11, 2012 by ladybug*

**pre-cal**

Find the real zeros of f (x)= 2x^3 + 3x^2 8x + 3
*October 12, 2012 by ladybug*

**pre-cal**

find the distance d (P1 P2) between the P1 and P2 P1=(-1,1);P2=(1,2)
*October 12, 2012 by ladybug*

**Pre Cal**

What is the phase shift of F(x) = 3 sin (2x - 2)?
*November 15, 2012 by Candace*

**Pre-cal**

f(x)= x+1 and g(x)= square root of x-3 please help me!
*December 13, 2012 by Isis*

**Pre-Cal.**

write f(x) in factored form.
*January 5, 2013 by phyllys*

**pre cal **

Solve G(x) for the given domain. G(x) = 3x 2 - 2x - 1 G(6) =
*June 19, 2013 by tanya*

**pre cal**

Find the inverse of the function. f(x) = x3 + 8
*June 23, 2014 by Jorgeeee*

**Simple pre cal**

Is the relation a function? {(14, 9), (15, 8), (8, 7), (1, 9), (15, 2)}
*December 3, 2015 by maddie*

**Pre-cal**

What is the area of triangle ABC if a = 19, b = 14, and c = 23?
*February 5, 2016 by sam*

**pre-cal**

How do you work inverse functions alebraically?
*September 20, 2007 by chris*