# Pre Cal/Vectors

7,718 results

**pre cal**

Find the angle between the vectors u and v if u=i+4j and v=−i+2j.

**Pre-Cal**

Use the law of cosines to find the angle of Q between the given vectors. v=3i + j w=2i - j

**pre-Cal(Please help)**

Use the law of cosines to find the angle Q between the given vectors. v = 3i + j w = 2i - j

**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

**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. /...

**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

**pre cal**

does anyone take pre-cal online ?

**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

**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

**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?

**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?

**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

**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 =)

**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 =)

**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

**Pre-calculus**

An expedition walks 4 kilometers from camp on a bearing of 30 degrees, then turns and walks 10 km on a bearing of 160 degrees. Find the magnitude of the new location relative to the beginning location using vectors. -> if you can, can you possibly show how the triangle ...

**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) ...

**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 ...

**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...

**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...

**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

**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.

**Pre-Cal**

xy=2 {{x^2=3+y^2}}

**Pre Cal**

1 --------- 2x^2-2 --------------- 2 + x ---- ------- x+11 x^2-2x-3

**pre cal**

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

**Pre cal**

ix^2-2x+i=0

**Pre Cal**

x 2 + y 2 = 0

**pre cal**

x^2+bx+ ?=(x+ ? )^2.

**pre cal**

(x/x-1)-(x/x+1) -2=0

**pre cal**

1/(x-1)- x/(x+1)-2=0

**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 ...

**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?

**pre - cal**

12-5y^2 what's the question?

**Pre-Cal**

What are bearings??

**pre cal**

what is the sum of e or 1n

**Pre Cal**

Solve for x 2^x=8^x-3

**pre cal**

solve for x 8x-(2x-1)=3x-10

**Pre Cal**

What is the inverse of g(x)= 1/2(x-1)^3-4

**pre cal**

(y^2)^-4y^8 simplify

**Pre-Cal.**

How does this go from x^2+ to 2i, explain.

**Pre-Cal**

tan-1=43\9.3

**Pre-Cal**

2y=cos(4(t-6))+6

**pre cal**

f(x) = 3x + 5, g(x) = 6x^2 Find (fg)(x)

**Pre cal**

sin55=12/b what is b

**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?

**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

**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

**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.

**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.

**Chemistry**

Which of the following is the correct unit for specific heat? degree C*** Cal cal/g cal/(g*deg C)

**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.

**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?

**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.?

**pre-cal**

find the value(s) of x for which f(x)=g(x). f(x)=x^4-2x^2,g(x)=2x^2

**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?

**pre cal**

What would cos2theta=-1/2 be???

**Pre-Cal**

Find f X g 3 sqrt of x+1 X x^3+1

**Pre-Cal**

Simplify e^3ln2-1

**pre-cal**

(576^1/2+512^1/3)^1/3

**pre-cal**

tan((theta/2)+(pi/6))=-1

**Pre Cal**

simplify the quotient: [x(5x+1)-3(x^2+1)]/ [(x-1)^2]

**Pre Cal**

cos^2+tan^2=1

**Pre Cal**

cos 75 deg

**pre cal**

7tan^2(pheta)-2=3

**pre-cal**

f(x)=((6xy^3)^1/2)((30x^4y^6)^1/2)/(5x^-7y^4)^1/2

**Pre Cal**

f(x) = log3(93 x + 3 815 x + 3)

**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

**pre cal**

quadratic equation 2x^4-5x^2+2=0

**Calculus and Vectors**

THE VECTORS a - 5b AND a-b ARE PERPENDICULAR. IF a AND b ARE UNIT VECTORS, THEN DETERMINE a dot b

**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.

**PRE-CAL**

SIMPLIFY 55/SQUARE ROOT OF 20 -3

**pre cal**

solve for x: x^(2/3)=(1/27) (2^(x)+4)/(2^x)=2 explain please

**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)-->-‡; ...

**Pre-Cal**

solve(5-x)^-3=8 teach if possibe if not, its ok Thanks

**Pre-Cal**

Find the inverse of the function f(x) = 3^x+2

**Pre-Cal**

Identify any asymptotes of the graph. y = 1.08^5x

**Pre-Cal**

What is the domain of f/g? f(x) = x / x+1 g(x) = x^3 Please explain! Thank you

**Pre-Cal**

what about the domain of 1/x. Would it be 0?

**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

**Pre-Cal**

Find the domain for the function f(x)=-2x^(2)÷-x^(2)-6x-27

**pre-cal**

what is the vertex and directrix of the parabola y=-1/2x^2 + 10 - 46

**pre cal**

[root2(cos2pi/11+isin2pi/11)]^4

**Pre Cal**

the function y= tan (x/3) has an x intercept at?

**pre cal 2**

solve the equation 4cos^2x-1=0

**Pre Cal**

simplify the quotient: [(x+1)^3(4x-9)-(16x+9)(x+1)^2]/[(x-6)(x+1)^3]

**pre-cal**

Find B so that F(x)=-x^2+bx-75 has a maximum value of 25.

**Pre-Cal**

find the value of the function k(p/q)

**Pre-cal**

Does the equation x^2+x-12/x+2 have holes?

**Pre-cal**

10.2 can someone show me this graph(x+2)^2/4+(y+2)^2/15=1

**Pre cal**

Sec^2x=2 With 10 different answers

**pre-cal**

solve the equation algebraically. 7e^x=11-e^-x

**pre-cal**

Find the real zeros of f (x)= 2x^3 + 2x^3 – 8x + 3

**pre-cal**

Find the real zeros of f (x)= 2x^3 + 3x^2 – 8x + 3

**pre-cal**

find the distance d (P1 P2) between the P1 and P2 P1=(-1,1);P2=(1,2)

**Pre Cal**

What is the phase shift of F(x) = 3 sin (2x - 2)?

**Pre-cal**

f(x)= x+1 and g(x)= square root of x-3 please help me!

**Pre-Cal.**

write f(x) in factored form.

**pre cal**

Solve G(x) for the given domain. G(x) = 3x 2 - 2x - 1 G(6) =

**pre cal**

Find the inverse of the function. f(x) = x3 + 8