Sunday

February 14, 2016
Number of results: 19,451

**Geometry & Vectors**

find an equation for the plane passing through the points Pi(3,1-2), Pii(-1,2,4) and Piii(2,-1,1)
*October 29, 2009 by Beta plus*

**College Algebra**

ONE MORE PROBLEM TO HELP ME WITH!!!! How do you graph the inequality on a plane? 3x+4y is less than or equal to 12
*November 18, 2009 by LeAnn*

**math**

a point has coorindate that are(+,-) where is it located in the coordinates plane? A)quadrant4 B)quadrant3 c)quadrant2 d)quadrant1
*January 17, 2010 by makeeda*

**Calculus**

Use a triple integral to find the volume of the solid enclosed by the paraboloid x=8y^2+8z^2 and the plane x=8.
*April 23, 2010 by Salman*

**Vector**

Determine the caresian equaiton of a plane that pass through point P(1,2,2) and is perpendicular to the line (x,y,z)= 3,-1,-4 + t(-2,3,1)
*May 30, 2010 by Gabe*

**Vector**

2. Determine the Cartesian equation of the plane passing through the point P(2, -1,2) and containing the line r = (2, -1, 4) + f(0, 3, -5).
*June 1, 2010 by Patrick*

**Calculus III**

Find an equation of the plane passing through the three points given. P=(5,1,1) Q=(1,1,2) R=(2,1,1)
*September 2, 2010 by Calvin*

**linear algebra**

Find the equation of the plane for which each point is equidistant from P(2,1,1) and Q (-4,7,9). Show all work
*November 14, 2010 by Stephanies*

**Geometry **

What is the area of a circle formed by the intersection of a plane that is 24 mm from the center of a sphere whose radius is 30 mm.
*May 5, 2011 by Mary*

**calculus**

given the functions f(x) = sqrt x+1 and g(x) = 6x+a in the xy coordinate plane, y= f[g(x)] passes through the point (3,5) . what is the value of a ?
*June 5, 2011 by perlas*

**chemistry**

Which of the following will lie flat on a plane? Methane, ethane, ethene, ethyne, chloromethane?
*July 10, 2011 by g*

**physics**

a plane is flying at 250 km hr an hit a 50 km hr headwind what is its resultantt speed relative to the ground
*December 11, 2011 by Victor*

**calculus **

find a vector equation of the line, which passes through the point (1,3,11) and is perpendicular to the yz-plane
*March 18, 2012 by kally*

**calculus**

find the average value of the function f(x,y)=xe^y over the plane region R is the triangle with vertices (0,0), (1,0) and (1,1)
*April 2, 2012 by mabel*

**calculus**

find the average value of the function f(x,y)=xe^y over the plane region R is the triangle with vertices (0,0), (1,0) and (1,1)
*April 5, 2012 by Anonymous*

**calculus**

find the volume of the solid bounded above by the surface z=f(x,y) and below by the plane region R f(x,y)= 4-2x-y; R{(x,y)0<x<1;0<y<2
*April 5, 2012 by sol*

**calculus**

find the average value of the function f(x,y)=e^(-x^2) over the plane region R which is the triangle with vertices (0,0), (1,0) and (1,1)
*June 12, 2012 by soffy*

**Calculus**

A differentiable function f(x,y) has the property that f(2,2)=2 and fx(2,2)=1 and fy(2,2)=2. Find the equation of the tangent plane at the point on the surface z=f(x,y) where x=2, y=2.
*October 17, 2012 by Caroline*

**math**

find the perimeter of a triangle whose vertices are the followinf specified points in the plane? (9,-1)(-9,7)and(4,3)
*October 23, 2012 by LeTaira*

**math**

find the perimeter of a triangle whose vertices are the followinf specified points in the plane? (-5,4)(2,9)and(10,-5)
*October 23, 2012 by LeTaira*

**math**

find the parametric equations of the line that passes through the point p(2,3,4)& parallel to the xz-plane
*December 19, 2012 by Bayeh*

**physics**

A plane cruising at 251 m/s accelerates at25 m/s2 for 9 s.What is its final velocity?Answer in units of m/s
*December 17, 2012 by nathan*

**science**

what is the magnification of an object 2cm tall when placed 10cm in front of a plane mirror?
*January 15, 2013 by christiana*

**Physics**

A person stands 2.0 m away from the reflecting surface of a plane mirror. What are the image characteristics?
*February 13, 2013 by Madison*

**Physics**

The magnification of an object 2km tall where placed in 150m in front of a plane mirror is ?
*April 4, 2013 by Omonayin Isreal *

**English**

What is the adverb and prepositional phrase in the sentence: The plane swooped and circled over the beach?
*April 24, 2013 by Anonymous*

**Calculus Grade 12**

Without solving , determine the points of intersection of the line r= (5,-9,3) +k (1,-12,2] and the plane [x,y,z]= (4,-15,-8) + s[1,-3,1] + t[2,3,1], if any exist.
*June 10, 2013 by Baljinder*

**Algebra**

Could you please tell me how to graph the inequality on a plane. 4x-3<7x+y with a line under the greater symbol
*September 19, 2013 by Pam*

**Vectors **

Consider the lines L1: [x,y,z] = [4,-2,k] + s[1,1-3] +t[2,3,1] Determine a value of k that is 10 units away from the plane with the equation 10x-7y+Z-28=0
*December 16, 2013 by Tristan*

**calculus**

find the volume of solid inside the paraboloid z=9-x^2-y^2, outside the cylinder x^2+y^2=4 and above the xy-plane
*May 10, 2014 by AIRA*

**english**

how can i describe a plane crash using imagery in first person point of view ?
*October 26, 2014 by liam*

**Physics **

700 kg plane is traveling at 90 m/s at altitude of 1500 m what is planes total mechanical energy
*October 31, 2014 by Anonymous*

**math**

Find the unit vector perpendicular to the plane ABC where the position vectors of A, B and C are 2 ^i – ^j + ^ k , ^i + ^j + 2 ^ k and 2 ^i + 3 ^ k respectively.
*March 17, 2015 by kartik*

**math**

What is the area of the region in the xy-plane bounded by the graphs of x=1995, x=1996, y=1997, and y=1998?
*July 12, 2015 by roman*

**Science**

The lesion is located in the right thorax just lateral to the mid-saggital plane
*August 24, 2015 by Luis*

**Physics**

2.An airplane flies north at a constant speed of 220 km/h. How far will the plane travel in 3.50 h?
*November 18, 2015 by Micheal*

**MATH**

IF THERE ARE 7 DISTINC POINTS ON THE PLANE WITH NO THREE OF WHICH ARE COLLINEAR, HOW MANY DIFFERENT POLYGONS CAN BE POSSIBLY FORMED?
*December 9, 2015 by RONIEL JOHN*

**Algebra **

Find the perimeter of the triangle whose certified are the following specified points in the plane (5,-1) (-9,3) and (0,1
*January 12, 2016 by Student*

**Algebra **

Find the perimeter of the triangle whose vertices are the following specified points in the plane (-2,-7) (1,-6) and (-7,7)
*January 13, 2016 by Student*

**Physics**

A light beam strikes a piece of glass at a 60.00° incident angle. The beam contains two wavelengths, 450.0 nm and 700.1 nm, for which the index of refraction of the glass is 1.4824 and 1.4750, respectively. What is the angle between the two refracted beams?
*March 15, 2010 by John*

**Physics**

A LADY IS GETTING MARRIED IN 2DAYS TIME.HER HUSBAND BUYS HER A DIAMOND RING.ON THE DAY OF HER WEDDING HER HUSBAND PLACES THE RING ON HER FINGER.THE RING REFRACTS AT AN ANGLE OF 23.24 DEGREES.CALCULATE THE ANGLE OF INCIDENCE IF THE REFRACTIVE INDEX OF A RING IS 2.42
*March 21, 2011 by Sivashen*

**geomatry**

To support a young tree, you attach wires from the trunk to the ground. The abtuse angle the wire makes with the ground is supplementary to the acute angle the wire makes, and it is three times as large. find the measures of the angles? Thank you for yr response
*October 19, 2011 by manal*

**PHY2049**

A prism of glass of index of refraction 1.50 has angle of 45,45,90. A ray of light is incident on one of the short faces at an angle of theta. What is the maximum value of theta for which the ray of light suffer total internal reflection at the long face?
*July 25, 2012 by Mindy Calomba*

**vectors **

A sailboat is out on the water for a cruise. First it sails at a rate of 4.93 m/s, at an angle of 120.0° for a period of 65.0 minutes. The wind then shifts and the vessel makes progress at a rate of 2.19 m/s, at an angle of 85°, for a period of 35.0 minutes. What is the ...
*August 21, 2012 by james*

**Geometry 12**

Find the mistake made in the following proof. Explain why you think your colleague made this mistake. Given: AB∣∣ED and AB≅ED Prove: ΔABF≅ΔDEF Proof: It is given that AB∣∣ED so angle ∠DEB is congruent to angle ∠ABE, ...
*December 14, 2015 by Kayla Druery*

**math**

A multiple choice answers for the question. What is the measure of the dent angle for a star-shaped polygon with 20 points and a dent angle of 12 degrees? Asnwers are; 30 degrees, 50 degrees, 60 degrees, 90 degrees. How do I find the answer?
*February 23, 2010 by Donna*

**Maths**

Let A0=(−1,0), and let O be the origin (0,0). For each integer i≥1, we construct the point Ai so that |Ai−1Ai|=|Ai−1O| and the angle ∠OAi−1Ai is a right angle. If O,Ai−1,Ai+1 are not collinear for any value of i, what is the x-...
*May 26, 2013 by Someone need help~*

**Maths**

Let A0=(−1,0), and let O be the origin (0,0). For each integer i≥1, we construct the point Ai so that |Ai−1Ai|=|Ai−1O| and the angle ∠OAi−1Ai is a right angle. If O,Ai−1,Ai+1 are not collinear for any value of i, what is the x-...
*May 29, 2013 by ABCD*

**Maths**

Let A0=(−1,0), and let O be the origin (0,0). For each integer i≥1, we construct the point Ai so that |Ai−1Ai|=|Ai−1O| and the angle ∠OAi−1Ai is a right angle. If O,Ai−1,Ai+1 are not collinear for any value of i, what is the x-...
*May 29, 2013 by HELP~*

**sd**

Let A0=(−1,0), and let O be the origin (0,0). For each integer i≥1, we construct the point Ai so that |Ai−1Ai|=|Ai−1O| and the angle ∠OAi−1Ai is a right angle. If O,Ai−1,Ai+1 are not collinear for any value of i, what is the x-...
*June 2, 2013 by ded*

**Math**

Farmer McDonald has 150 acres of land to put into crops and 8000 dollars to spend planting and raising them. He can plant two crops, which we'll call crop A and crop B. Crop A costs $40/acre to raise and crop B costs $60/acre. He also has time costs to consider: Crop A ...
*March 6, 2011 by Jacqueline*

**Physic please help!**

I got the correct answer for part (a) but I am unsure of how to tackle part (b). Please help!!! Interactive LearningWare 22.2 at wiley/college/cutnell reviews the fundamental approach in problems such as this. A constant magnetic field passes through a single rectangular loop ...
*October 11, 2007 by Mary*

**physics**

If I have a unit vector of (2.06 j)m/s(I have no i vector because it's 0 on a horizontal impulsion, in accordance with my problem,how do I convert that into polar notation? Will I be doing rcos0, with r being 2.06? . But then again I have no angle, just the angle of before the...
*February 8, 2012 by Raf*

**Grade 12 Calculus **

I need helping in filling in the blanks/ -the angle formed at the centre of the circle by two radii is the _______ angle. -cos delta, sin delta, tan delta are known as the ___________trigonometric ration -cos (pie/2 - x)=sinx is an example of a ________ identity
*May 11, 2013 by Thomas*

**Angle of elevation**

John stands at 12 feet from the foot of a tree. The angle of elevation to the top of the tree is 60°. What is the height of the tree?
*February 5, 2014 by kris*

**physics: scalars/vectors**

Please check. 1. Which of the following quantities are scalars, and which are vectors? a. the acceleration of a plane as it takes off- VECTOR b. the number of passengers on the plane- SCALAR c. the duration of the flight- SCALAR d. the displacement of the flight- VECTOR e. the...
*September 17, 2006 by Anonymous*

**geometry**

given the measure of angle 1=4x+30 and the measure of angle 3=2x+48 then X=?
*October 10, 2011 by Leesha*

**maths**

a hiker walk due east at 4km per hour and a second hiker starting from the same point walks 55 degree north-east at the rate of 6km per hour. H ow far apart will they be after 2 hours. this is my ques but .i am having problem that if the hiker walks 55 degree north east so if ...
*February 17, 2013 by annny *

**maths**

A straight highway leads to the foot of a tower of height 50m. From the top of the tower, the angles of depression of two cars standing on the highway are 30 degree and 60 degree. What is the distance between the two cars and how far is each car from the tower ?
*October 17, 2013 by Ruth*

**maths**

A straight highway leads to the foot of a tower of height 50m. From the top of the tower, the angles of depression of two cars standing on the highway are 30 degree and 60 degree. What is the distance between the two cars and how far is each car from the tower ?
*October 17, 2013 by Ruth*

**math**

Can anyone help w/ these. 1) Solve the equation in the internal [0deg, 360deg]. a) sin 2x = -sin x b) sin 2T = -1/2 (where T is angle) c) 4 sin^2T = 3 2) Evaluate the expression. sin(arctan 2) 3) Rewrite the following w/o using trigonometric or inverse tirgonometric functions...
*December 9, 2006 by chyrl*

**physics**

1. A light ray strikes a mirror at an angle of 42° from the surface of the mirror. What angle does the reflected ray make with the normal Ans. 42° 2. A ray of light hits a mirror at 27° from the normal. What is the angle between the reflected ray and the normal. Ans. 27°
*April 7, 2014 by need help*

**Math**

Mr smith flight took off at Vancouver at local time 1335. The flight was bounded for Sydney via hongkong. After 16.5h flight, mr smith reached hongkong at 1505 local time on the same day. The plane took off again after 2h 20min. The plane landed in sydney at local time 0245 ...
*July 13, 2011 by StuartKess*

**physics**

The speed of light in clear plastic is 1.866 ×10^8 m/s. A ray of light enters the plastic at an angle of 29.3 degrees. At what angle is the ray refracted?
*September 26, 2011 by Ari*

**trigonometry**

Find the magnitude of the resultant force and the angle between the resultant and each force: Forces of 2 lbs and 12 lbs at an angle of 60 degrees to each other.
*November 27, 2012 by mikey*

**math**

in triangle ABC, line BF is angle bisector of angle ABC, line AE, line BF and line CDare medians, and P is the centriod. find Xif DP = 4x-3 and CP=30
*December 16, 2012 by Can't*

**Science**

What is the index of refraction of a material if the angle of incidence in air is 50 degrees and the angle of refraction in the material is 40 degrees? Please show steps.
*July 17, 2014 by Mariam*

**trigo**

a peak is sighted at an angle of 27 degree 45 min. 1000ft nearer its angle of elevation is 31 degree 30 min.find the height of the peak
*November 30, 2014 by chel*

**Physics 2**

Calculate the maximum height using the initial speed, half-time, and angle. The initial speeed is 9.8m/s, half time is 1.8, and the angle is 75.
*April 13, 2015 by Jennifer*

**Psychology Please Help!**

Nicki's mood swings are controlling her life. First, she is euphoric, creative, and needs little sleep. She then sinks into despondency. Her physician may prescribe: a. lithium to reduce the mania without worsening the depression. b. Prozac to elevate her moods. c. Lexapro to ...
*December 5, 2011 by Anonymous*

**Precalculus**

In most geometry courses, we learn that there's no such thing as "SSA Congruence". That is, if we have triangles ABC and DEF such that AB = DE, BC = EF, and angle A = angle D, then we cannot deduce that ABC and DEF are congruent. However, there are a few special cases in which...
*February 24, 2014 by John*

**math**

im doing angles and such...how can you find the measurements of all angles when you only know one measurement? for example: angle BOA=100 degrees now how would i find the other angle's measurements? i know about supplementary but is there a trick to use or a key??
*March 31, 2008 by nicole*

**physics**

A dive bomber has a velocity of 235 m/s at an angle θ below the horizontal. When the altitude of the aircraft is 2.15 km, it releases a bomb, which subsequently hits a target on the ground. The magnitude of the displacement from the point of release of the bomb to the ...
*February 18, 2011 by eric*

**physics**

What is the Bragg Scattering angle (i.e. the angle, in degrees, between the incoming incident beam and the reflected beam) for electrons scattered from a nickel crystal if their energy is 85 eV? The spacing between Ni Bragg planes is 0.215 nm. Give your result to 3 significant...
*May 12, 2011 by kaka*

**calculus**

The force F (in Newtons) required to move a box of mass m kg in motion by pulling on an attached rope is F(x) = f m g/(cos(x))+ f (sin(x)) where x is the angle between the rope and the horizontal, f is the coefficient of static friction and g = 9.8 m/s^2. Find the angle x that...
*November 14, 2011 by nate*

**math**

The force F (in Newtons) required to move a box of mass m kg in motion by pulling on an attached rope is F(x) = f m g/(cos(x))+ f (sin(x)) where x is the angle between the rope and the horizontal, f is the coefficient of static friction and g = 9.8 m/s^2. Find the angle x that...
*November 17, 2011 by ali*

**physics**

An inquisitive physics student, wishing to combine pleasure with scientific inquiry, rides on a rollercoaster sitting on a bathroom scale. (Do not try this yourself on a rollercoaster that forbids loose heavy packages.) The bottom of the seat in the rollercoaster car is in a ...
*September 19, 2010 by Manny*

**math**

a bus takes 12 hours to travel the same distance that an airplane travels in 1.5 hours. the average speed of the airplane ia 120 km per hour faster than five times the average speed of the bus. what is the average speed of the bus? let x represent the speed of the bus speed of...
*November 29, 2006 by aaron*

**Math**

Need help with some mystery shapes. the clues are 1. it has fewer than 3 diagonals, 2. its tiotal angle measure is greater than 180 degrees, 3. it at least has 1 obtuse angle, 4. it has at least 1 line of symmetry. I came up with A. Trapezoid, B. Rhombus, C. Scalene Traingle, ...
*March 18, 2011 by Rayna*

**Math: Geometry**

I am having trouble with a problem from my online math class. I tried using the basic angle properties of circles, but didn't get anywhere: Let ABCD be a cyclic quadrilateral. Let P be the intersection of AD and BC, and let Q be the intersection of AB and CD. Prove that the ...
*January 18, 2016 by I see you have graph paper. You must be plotting something.*

**physics**

(a) An object is subjected to two displacements. The displacement vector of the first, V1 , has a magnitude of 186 m at an angle 23° North of East. The second displacement vector, V2 , has a magnitude of 327 m at an angle 43° West of North. find the magnitude and direction of ...
*August 21, 2014 by shoushanik*

**Physical Science/light**

An object 5 millimeters high is located 15 millimeters in front of a plane mirro. How far from the mirror is the image located? The focal length f of a plane mirror is infinity and 1/f = 0. The optical equation becomes 1/Do + I/Di = 1/f = 0 Do is the distance to the object and...
*August 29, 2005 by Angie*

**I did it.. Check Plz?**

It saw with lucid eyes inhuman, divine Line 12 has an example of a stylistic device. What is that device called? A)allusion B)inversion <--- or A C)satire D)simile ------------------------------------ It’d seen a child die—Depression--a war,Bowed at the bedside of the lady ...
*January 2, 2015 by Jill*

**Calculus 12th grade (double check my work please) **

1.) which of the following represents dy/dx when y=e^-2x Sec(3x)? A.3e^-2x sec(3x) tan (3x)-2e^-2x Sec(3x)<<<< my choice B.)3e^-2x sec(3x)tan (3x)-2xe^-2x sec(3x) C.)3e^-2x sec(3x)tan (x)-2e^-2x Sec(3x) D.)3e^-2x sec(3x)tan (x)-2xe^-2x sec(3x) 2.)calculate dy/dx if...
*March 7, 2011 by anon*

**PHYSICS**

A long-straight wire carries a current and is aligned with the North-South direction. You place a compass 4 cm directly above the wire and above the North/East/South/West plane. The compass needle, which initially pointed North (far away from the wire) is now deflected by 20o ...
*October 17, 2012 by Alysse*

**Physics**

A magnetic field is perpendicular to the plane of a single-turn circular coil. The magnitude of the field is changing, so that an emf of 0.93 V and a current of 2.7 A are induced in the coil. The wire is the re-formed into a single-turn square coil, which is used in the same ...
*February 18, 2011 by Emily*

**statistics**

Slf-Esteem Scoresdepression Scores Mean 3.43 15.78 StrdDev 0.75 10.34 13. The above chart contains the means and standard deviations for self-esteem scores and depression scores. Using this information and the most likely correlation coefficient obtained in Question 12 (-.76...
*September 25, 2014 by matt*

**statistics**

Slf-Esteem Scoresdepression Scores Mean 3.43 15.78 StrdDev 0.75 10.34 The above chart contains the means and standard deviations for self-esteem scores and depression scores. Using this information and the most likely correlation coefficient obtained in Question 12 (-.76), ...
*September 26, 2014 by mike*

**Chemistry **

A biochemical engineer isolates a bacterial gene fragment and dissolves a 15.1 mg sample of the material in enough water to make 32.7 mL of solution. The osmotic pressure of the solution is 0.340 torr at 25°C. a) What is the molar mass of the gene fragment? b) If the solution ...
*February 11, 2015 by Pooja*

**physics**

You see an optical illusion of an ever-upward spiral staircase. The climber trudges up and up and never gets anywhere, going in circles instead. Suppose the staircase is provided with a narrow ramp, allowing the tired stair-climber to push a wheelbarrow up the stairs. The ...
*November 4, 2012 by Lance*

**Physics**

A shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 52(angle sign here) downward from the horizontal. Find the work done by the shopper on the cart as the shopper moves along a 50.0 m length of aisle. Someone tell me if this is right: W= (35....
*October 24, 2010 by Edwin*

**chemestry**

The silicon wafer is coated with a layer of metallic aluminum which acts as an electrical contact. The x-ray diffraction pattern of aluminum is measured in a diffractometer with Fe Kα radiation. At what angle, θ, do you expect to observe the first reflection of ...
*January 12, 2013 by ANoni*

**Math**

This is gr 12 calculus btw I need helping in filling in the blanks/ -the angle formed at the centre of the circle by two radii is the _______ angle. -cos delta, sin delta, tan delta are known as the ___________trigonometric ration -cos (pie/2 - x)=sinx is an example of a ...
*May 8, 2013 by Thomas*

**math - trig**

Suppose ABC is a right triangle with sides of lengths a, b, and c and right angle at C. Find the unknown side length using the Pythagorean Theorem and find the following trigonometric functions of the indicated angle. Given: a = 4 and b = 7 Find: sin A, cot B, sec A, tan B
*September 25, 2013 by Annika*

**Physics**

Which of the following forces does NOT have a zero work done on the object. Choices The normal force on a box that slides across a horizontal level floor. The weight on a box that slides across a horizontal level floor. The normal force on a box that slides down an inclined ...
*November 11, 2010 by rose*

**Criminal Justice/Probation & Parole**

Each of the following statements is true about the indeterminate sentence except: A. it originated at Elmira Reformatory. B. it requires the use of a parole board. C. it was not popular during the Great Depression. D. it usually involves a minimum and a maximum, with the ...
*March 7, 2015 by Pat*

**Physics**

I'm having a hard time with some free body diagrams. If you have a box on a slope/ramp and the angle of the ramp is X degrees why is it that the angle between the normal force and the gravitational force is also X degrees? Am I missing something obvious here?
*March 26, 2009 by KC*

**MECHANICS**

A string of length l carries a small pulley C from which is suspended a load W. The string hangs between two vertical walls which are at distance d apart.The end A is higher than end B by height h.find position of equilibrium defined by angle X. X is angle between AC and AB. d...
*November 23, 2010 by ACD*

**physics**

A 23.1 kg block is dragged over a rough, horizontal surface by a constant force of 95.0 N acting at an angle of angle 29.3 ° above the horizontal. The block is displaced 5.50 m, and the coefficient of kinetic friction is 0.341. Find the magnitude of the work done by the normal...
*September 15, 2011 by Elisabeth*

**dgh**

Two Trees are 150 m apart. From a point halfway between them, the angle of elevation of their tops is 15°and..? 15°, and 20°. a)How much taller is one tree than the other? b) Where would a person have to stand in order to have the angle of elevation to the top of each tree ...
*December 17, 2011 by pooi*