Sunday

October 23, 2016
Number of results: 7,284

**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*

**Physics**

Please help me with this its very hard to visualize the problem. The analytical method of adding vectors expressed in terms of their components may be applied to vectors in three dimensions, for which graphical work is inconvenient. Find the magnitude of the resultant of the ...

*September 26, 2016 by Donna*

**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*

**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 - 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*

**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*

**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 *

**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*

**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*