Monday

July 28, 2014

July 28, 2014

Total # Posts: 723

**Calculus**

5. Determine an equation for the plane that is exactly between the points A(-1, 2, 4) and B(3, 1, -4).

**Calculus**

4. Write a vector equation of the line through the point (5, -2, 3) and parallel to the vector v=[4, -3, 1]

**Calculus**

6. Find out if the line r = (1, 3, 8) + t (-2, 5, 7) is parallel to the plane 3x + 4y - 2z = 1

**Calculus**

5. Determine an equation for the plane that is exactly between the points A(-1, 2, 4) and B(3, 1, -4).

**Calculus**

is it like this r = (5, -2, 3) + t (4, -3, 1) thats all i have to do for this question?

**Calculus**

how do i do that...

**Calculus**

4. Write a vector equation of the line through the point (5, -2, 3) and parallel to the vector v=[4, -3, 1]

**Calculus**

thank you steve :)

**Calculus**

3. Determine that the vectors u=[t, 4, 2t+1] and v=[t+2, 1-t, -1] are perpendicular, find the possible values of the contant, t.

**Calculus**

thanks Steve!

**Calculus**

2. Give that the vectors u=[2, t, -4] and v=[1, -3, t-4] are perpendicular, find the value of the constant, t.

**Calculus**

thanks steve!

**Calculus**

1. Find a unit vector which is perpendicular to both of the vectors m=[4, 2, -3] and n=[2, -3, 1]

**spanish/help pleaseeeee**

cuando yo era chica, mi vida era muy diferente. Yo nunca trabajaba, solo jugaba con mis amigas. Mis padres iban al trabajo y mis abuelos me cuidaban. Nosotros no teniamos un televisor, por eso nos divertiamos con la conversacion, los juegos y la musica,

**Calculus**

thanks

**Calculus**

t(t+2) + 4(1-t) - (2t+1) = 0 t = 1,3 like that?

**Calculus**

3. Determine that the vectors u=[t, 4, 2t+1] and v=[t+2, 1-t, -1] are perpendicular, find the possible values of the contant, t.

**Calculus**

thanks!

**Calculus**

You want u.v=0 2 - 3t - 4(t-4) = 0 t = 18/7 like that?

**Calculus**

2. Give that the vectors u=[2, t, -4] and v=[1, -3, t-4] are perpendicular, find the value of the constant, t.

**Calculus**

thank you !

**Calculus**

| i j k | | 4 2 -3 | | 2 -3 1 | = [-7,-10,-16]/9√5 like this? please check if it's correct, thanks MathMate

**Calculus**

1. Find a unit vector which is perpendicular to both of the vectors m=[4, 2, -3] and n=[2, -3, 1]

**Maths**

Dear Rainy, Shape is 300 * 300 so total 90000 sq feet. Now since u know the shape, can u pl guide abt the answer. Thank u v much in advance. J

**Maths**

How many trees can be planted in an area of 90000 sq feet if vertically 8 feet distance and horizontally 3 feet distance is to be kept? Pl show the method of calculations.

**Calculus**

Write a vector equation AND parametric equations of the line through the points A(6,-1,5) and B(-2,-3,6) direction vector = [8,2,-1] a vector equation r = (6,-1,5) + t(8,2,-1) use that to write the parametrics how do i write parametrics

**Calculus**

using cartesian vectors ** forgot to include that.

**Calculus**

determine the each resultant a) 10 km/h north followed by 8 km/h west b) 25 N at 10 degrees to the horizontal and 30 N horizontally.

**Calculus**

three forces each of magnitude 50 N, act in eastward, westward, and northwest directions, Find the resultant force.

**Calculus**

determine the angle between the planes 2x + 2y + 7z = 8 and 3x - 4y + 4z = 5

**Calculus / a bit of physics**

explain why a scalar equation of the line exists in 2-D space, but not in 3-D space.

**Calculus**

determine an equation for each plane a) contains the point A(6,2,3), B(5,1,-3), and C(5,7,-2) b) parallel to 2x + 6y + 4z = 1 and contains the point P(3,2,1)

**Calculus**

determine the angle between the planes 2x + 2y + 7z = 8 and 3x - 4y + 4z = 5

**Calculus**

explain why a scalar equation of the line exists in 2-D space, but not in 3-D space.

**Calculus**

determine an equation for each plane a) contains the point A(6,2,3), B(5,1,-3), and C(5,7,-2) b) parallel to 2x + 6y + 4z = 1 and contains the point P(3,2,1)

**Calculus**

how do i write the parametrics

**Calculus**

how do i write the parametrics

**Calculus**

Write a vector equation AND parametric equations of the line through the points A(6,-1,5) and B(-2,-3,6)

**Calculus**

thankyou!

**Calculus**

Determine the vector u = AB and its magnitude, given A(3,7,-2) and B(9,1,5).

**Calculus**

thank you!

**Calculus**

Calculate the angle between u = [5,7,-1] and v = [8,7,8]

**Calculus**

thank you!

**Calculus**

Calculate the dot product of two vectors: m = [4,5,-1] and n = [6,-2,7]

**Calculus**

Find the total work done by a 15 N force in the direction of the vector [1,2,2], when it moves a particle from O[0,0,0] to P[1,-3,4] and then from P to A[7,2,5]. Distance is measured in metres.

**Calculus**

for this question, do i have to solve it? it just says interpret the results, does that mean only explain? im trying to solve it right now. i have: L1: [x,y,z]=[-1,1,0]+s[3,4,-2] L2: [x,y,z]=[5,9,-4]+t[2,3,1] First, cross product of the two directional vectors from both lines:...

**Calculus**

Find the distance between the lines [x,y,z] = [-1,1,0] + s[3,4,-2] and [x,y,z] = [5,9,-4] + t[2,3,1]. Interpret the result.

**Calculus**

Isnt it 30 + 50 + 10 because 10* 1 is 10 so final is = 90

**Calculus**

could you help me calculate the second part also? thank you

**Calculus**

I don't understand it.. what is the final work done? Also, the arrows (< and >) are they actually supposed to be written as < and > or are they supposed to mean brackets ( ) or these brackets [] thank you

**Calculus**

Find the total work done by a 15 N force in the direction of the vector [1,2,2], when it moves a particle from O[0,0,0] to P[1,-3,4] and then from P to A[7,2,5]. Distance is measured in metres.

**Calculus**

We need the direction of their line of intersection? That's all the question mentioned... so is that still the correct answer? :/

**Calculus**

Find the vector equation of the line that passes through the point (2,-1,7) and is parallel to the line of intersection of the planes x + 2y - 3z = -6 and 3x - y + 2z = 4

**Calculus**

thank you :)

**Calculus**

Three forces of 5 N, 8 N, and 10 N act from the corner of a cube along its edges. Using Cartesian vectors, find the magnitude of the resultant force.

**Calculus**

Three forces of 5 N, 8 N, and 10 N act from the corner of a cube along its edges. Using Cartesian vectors, find the magnitude of the resultant force.

**Calculus**

Find the vector equation of the line that passes through the point (2,-1,7) and is parallel to the line of intersection of the planes x + 2y - 3z = -6 and 3x - y + 2z = 4

**Calculus**

how do i check that? that the components (z) match "automatically"

**Calculus**

is this a) First see that the two vectors are orthogonal: [4,8,-4].[-1,2,3]=-4+16-12=0 => orthogonal Next solve for s and t for each coordinate direction (x,y,z) 4+4t=1-s 7+8t=5+2s => s=-1, t=-1/2 and this b) Substitute into original equation: <4,7,-1>-<2,4,-2&g...

**Calculus**

10. Consider the lines [x,y,z] = [4,7,-1] + t[4,8,-4] and [x,y,z] = [1,5,4] + s[-1,2,3]. a) Show that the lines intersect at the right angle. b) find the point of intersection. please and thanks!

**Calculus**

thank you!

**Calculus**

Does the line [x,y,z] = [-2,6,5] + t[3,2,-1] lie in the plane 3x - 4y + z + 25 = 0 ? Please show work.

**Calculus**

Explain why a line in three-space cannot be represented by a scalar equation.

**Calculus**

thank you :)

**Calculus**

Determine an equation for the line parallel to 2x + 6y + 4z = 1 and contains the point P(3, 2, 1).

**Calculus**

So the final answer for this one would be [x,y,z]=[6,10,1]+1[3,4,-1]=[9,14,0] ? Thank you!

**Calculus**

Where does the line [x, y, z] = [6, 10, 1] + t[3, 4, -1] meet the xy-plane?

**Calculus**

thank you! :)

**Calculus**

Could you please help me with this question though, I don't understand this one: Explain why a line in three-space cannot be represented by a scalar equation. thank you!

**Calculus**

Thank you! everything is clear :)

**Calculus**

I don't understand it still.. So is a) parallel and b) coincidental? Please help! :(

**Calculus**

Determine if the planes in each pair are parallel and distinct or coincident. a) 5x - 2y + 4z = 7 5x - 2y + 4z = -3 b) 7x - 3y - z = 9 21x - 9y - 3z = 27

**Calculus**

Explain why a line in three-space cannot be represented by a scalar equation.

**Calculus**

Hi bobpursley, I got 2 answers for a) but I'm not sure which one is correct, could you please help me determine which is correct? the first answer I got is posted in this question, the second answer I got is this one for part a) could you please help me for a) I got this i...

**Calculus**

1. a) Write the vector and parametric equations of the line through the points A(6, -1, 5) and B(-2, -3, 6). b) Find another point on the line in (a). ----- This is what I got for a) r = 6i-j+5k + t(-8i-2j+k) x = 6-8t y = -1-2t z = 5+t I need help with b)

**Calculus grade 12**

thank you :)

**Calculus grade 12**

Explain why three directional vectors of the plane cannot me mutually perpendicular .

**Calculus grade 12**

Determine an equation for the line parallel to 2x + 6y + 4z = 1 and contains the point P(3, 2, 1).

**Calculus grade 12**

Explain why three directional vectors of the plane cannot me mutually perpendicular .

**Calculus grade 12**

Determine an equation for the line parallel to 2x + 6y + 4z = 1 and contains the point P(3, 2, 1).

**Calculus grade 12**

thank you :)

**Calculus grade 12**

Determine an equation for the plane that contains the points A(6, 2, 3), B(5, 1, -3), and C(5, 7, -2).

**Calculus grade 12**

Steve, for a) I got this instead: vector equation: [x, y, z] = [6, -1, 5] + t[-8, -2, 1] parametric equation: x=6+t(-2) x=6-2t y=-1+t(-3) y=-1-3t z=5+6t is that correct? ...

**Calculus grade 12**

Can you please do b) Steve? Thank you.

**Calculus grade 12**

1. a) Write the vector and parametric equations of the line through the points A(6, -1, 5) and B(-2, -3, 6). b) Find another point on the line in (a).

**African American Lit**

Would the last stanza be an example of Naturalism? "Maud, who went to college, Is a thin brown mouse. She is living all alone In this old house."

**African American Lit**

For what I am trying to understand I am using these definitions: Realism- a faithful reproduction of reality and promotes awareness Naturalism- a harsher treatment of reality and realism Modernism- connecting realism and naturalism to today.

**African American Lit**

How is the poem 'Sadie and Maud' by Gwendolyn Brooks synonymous to Realism, Naturalism and Modernism?

**PHYSICS**

A catapult launches a rocket at an angle of 56.9° above the horizontal with an initial speed of 100 m/s. The rocket engine immediately starts a burn, and for 3.25 s the rocket moves along its initial line of motion with an acceleration of 28.1 m/s2. Then its engine fails, ...

**Chemistry**

I still dont understand what to do after setting the K= pO2^(3/2). What do you substitute into the O2?

**algebra**

Participants in a psychology experiment were able to memorize an average of M words in t minutes, where M = −0.001t3 + 0.1t2. Use the following graph.Estimate the number of words memorized after 14 min. m 20 / 18 / 16 / 14 / 12 / 10 / 8 / 6 / 4 / 2/02468101214161820t

**math**

Determine the water level inside a tank that has a diameter of 40 feet and contains 180,000 gallons of water?

**RUBY MS**

what is 8.3% of 132,000,000

**Physics**

A 83-kg fisherman in a 122-kg boat throws a package of mass m = 15 kg horizontally toward the right with a speed of vi = 4.7 m/s as in the figure below. Neglecting water resistance, and assuming the boat is at rest before the package is thrown, find the velocity of the boat af...

**Physics**

An object has a kinetic energy of 244 J and a momentum of magnitude 24.9 kg · m/s. (a) Find the speed of the object. (b) Find the mass of the object.

**Chemistry**

my deltaGf was dGf=290.4kJ/mol i got K=1.69e18 as my answer and it was correct. still getting the equation wrong though :/

**math**

nicks class has 30 students. 2/5 of his class sings in the school chorus. how many students sing in the chorus?

**physics**

hb h

**Physics**

310

**Finance**

Suppose your bank account will be worth $4,200.00 in one year. The interest rate (discount rate) that the bank pays is 5%. What is the present value of your bank account today?

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