Wednesday
April 16, 2014

Posts by J


Total # Posts: 672

math
the reciprocal of the expression 2/x + 3/1

Math
578 of 850 employees work directly with guests what percentage of employees work directly with guests

social studies
What physical feature in Africa is located in the northeast and seperates it from Asia?

Math (Algebra 1)
24.333

Math
Central Middle School sold 50 tickets for one night of the school play. Student tickets sold for $2 each and adult tickets sold for $3 each. They took in $135. How many of each type of ticket did they sell?

Physic
A 10 kg particle moving along the x-axis experiences the force shown in figure. The particle goes from v=1.0m/s at x=0 and v=5.0 m/s at x=2. What is the f max?

science
Thank you Ms.Sue you a super duper smart and you are the best! :) :D

science
Any websties that say if a snowflake is a crystal? |

science
Is a snowflake a crystal? Can you show me a website were i can read about what a crystal is?

science
Is a mineral a crystal?

voltage drop
12v r1=10 r2=15 r3=2 r3=18 how would one solve this

CALC 251
Suppose that f(x)= (e^x)/(x^2+16. Find f'(0).

CALC 251
Let f(x)= [5x^(1/4)]*(x^3-8) Evaluate at f'(x).

math
A water trough is 4 m long and its cross-section is an isosceles trapezoid which is 210 cm wide at the bottom and 280 cm wide at the top, and the height is 70 cm. The trough is not full. Give an expression for V, the volume of water in the trough in cm^3, when the depth of the...

Calculus 251
The slope of the tangent line to the curve y= 3x^3 at the point (-1,-3) is:? The equation of this tangent line can be written in the form y=mx+b where m is:? and where b is:?

ENGLISH
You can't expect people to do your homework for you. The whole idea is to help each other. I can check your answers but that's hard to do when you dont post any....

finance
You have been given the following information on a project: It has a 3-year lifetime The initial investment in the project will be $28 million, and the investment will be depreciated straight line, down to a salvage value of $6 million at the end of the fourth year. The revenu...

Physics
A truck is stopped at a stoplight. When the light turns green, the truck accelerates at 2.0 m/s2. At the same instant, a car passes the truck going 13 m/s. Where and when does the truck catch up with the car? _________m (from the intersection)

math
plz help

Elena plz help
help me plz

math
4. Point E is located at (–2, 2) and point F is located at (4, –6). What is the distance between points E and F? a. square root of 52 b. square root of 28 c. 10 d. square root of 20 5. In which quadrant is the point (x, y) located if x is negative and y is positive? ...

math
c d a

algebra
From a point on a straight road. Pablo and Kelsey ride bicycles in the same direction. Pablo rides 12mph and Kelsey ride 14mph. How many hours will they be 9 miles apart

History
What were the economic and social condition of America in the early 1900s (1900-1940)?

CHEMISTRY
HOW MANY GRAMS OF CALCIUM IS 3.08 MOL OF Ca?

CHEMISTRY
HOW MANY MOLES OF CALCIUM IS 139g OF Ca?

CHEMISTRY
HOW MANY ATOMS 0.151 MOL OF LITHIUM?

CHEMISTRY
HOW MANY MOLES OF LITHIUM IS 2.69XE9

geometry
Given x is the midpoint of yz. given xy =6x+4 and yz=40, fing the value of x

Geometry
Given x is the midpoint of yz. given xy =6x+4 and yz=40, fing the value of x

health
me to!! haha dey don't know

chemistry
If after precipitation of the Group I cations as chlorides by the reaction with HCl, nearly all of the precipitate dissolves in the hot water, what ion is most probably present and which ions are most probably absent?

physics
the motion of a particle along a straight line is described by the function x=(2t-3)^2 where x is in metres and t is in seconds. A)find the position ,veocity and acceleration at t=2 sec. B) find the velocity of the particle at origin.

Physics
Find the forces exerted by the two supports of a 4.0m, 50-kg diving board when a 60-kg woman stands at its end. The two supports are 0.8m apart. This time consider the mass of the diving board.

physics
A car starts from rest and travels for 6.3 s with a uniform acceleration of 2.3 m/s2. The driver then applies the brakes, causing a uniform acceleration of −1.9 m/s2. If the brakes are applied for 2.6 s, how fast is the car going at the end of the braking period?

physics
.0

Calculus
Find the shortest distance between the two skew lines L1 and L2 with equations r = [1,2,2] + s [4,3,2] and r = [1,0,-3] + t [4,-6,-1]

Calculus
Find the shortest distance from a point P(2,-1,2) to a line L r= [-1,0,7] + t [4,1,-2].

Calculus
thanks reiny!

Calculus
7. Where does the line r = (1, 2, -5) + t (2, -3, 1) meet the plane 2x + 5y - 3z = 6?

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
thank you reiny, thats the answer i first got but i wasn't sure if it was right, thanks

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 Grade 12 University
for the #4 i got r = (5, -2, 3) + t(4, -3, 1) --- can you please help me on 5, 6, 7. instead since i got 4. thanks steve

Calculus Grade 12 University
thanks steve. do you know how to do these ones? :( 4. Write a vector equation of the line through the point (5, -2, 3) and parallel to the vector v=[4, -3, 1] 5. Determine an equation for the plane that is exactly between the points A(-1, 2, 4) and B(3, 1, -4). 6. Find out if ...

Calculus Grade 12 University
8. Find the vector equation of the line in which the 2 planes 2x - 5y + 3z = 12 and 3x + 4y - 3z = 6 meet.

Calculus grade 12
7. Where does the line r = (1, 2, -5) + t (2, -3, 1) meet the plane 2x + 5y - 3z = 6?

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
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.

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