Wednesday

September 28, 2016
Number of results: 20,791

**geometry**

Name three regular polygons that will tessellate the plane

*October 24, 2009 by jeng*

**geometry**

Name three regular polygons that will tessellate the plane

*October 24, 2009 by jeng*

**math**

How many rectangles will fit about a point when tessellating the plane? How do you know?

*February 19, 2010 by nicole*

**vectors **

Find the distance between the parallel line and plane: l: r=[2,0,1] + t[1,4,1] pi: 2x - y + 2z = 4

*June 6, 2010 by Abigail *

**Physics**

the energy of a ball rolling up an inclined place plane is?

*June 7, 2010 by Mary*

**science**

if you are flying a plane at 600 km/h and you jump striaght up, where do you land and why?

*October 9, 2010 by sarah*

**Calculus**

Find the equation of the plane through (1,2,-2) that contains the line x = 2t, y = 3 - t, z = 1 +3t

*February 17, 2011 by Phil*

**Calc**

How do you know what shape the graph in the xy-plane represented by x=3sin(t) and y=2cos(t) is?

*May 3, 2011 by Erica*

**Physics**

why the ray reflected by the prism is brighter than that by the plane mirror?

*November 15, 2011 by demolitrate*

**physics**

the image you see in a plane mirror appears to be at what distance?

*November 24, 2011 by priscilla*

**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).

*May 3, 2012 by J*

**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.

*May 5, 2012 by J*

**Calculus**

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

*May 25, 2012 by j*

**Calculus**

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

*May 26, 2012 by j*

**Calculus**

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

*May 26, 2012 by j*

**Calculus**

determine the coordinates of two points on the plane with equation 5x + 4y - 3z = 6

*June 18, 2012 by Henry*

**physics**

moment of inertia of a ring perpendicular to tangent and its plane

*November 1, 2012 by sara*

**math**

Find the coordinates of the point of intersection of the plane 2x+y-3z+6=0 on the y-axis

*March 5, 2013 by tapz*

**multivariable calculus**

Find the equation of the plane containing the points (1; 0; 0), (0; 2; 0) and (2; 1; 3).

*March 26, 2013 by cheuk*

**Chemistry**

Calculate the density of atoms on plane (001) in Lithium

*April 26, 2013 by anon*

**chemistry**

calculate surface energy of 100 plane of niobium.

*May 31, 2013 by himani.*

**physics**

Can a plane mirror ever form real image?

*July 15, 2013 by Ritesh chaudhari*

**Calculus**

Where does the line through (1,0,1) and (3,−2,5)intersect the plane x+y+z=10? (x, y, z) =________?

*January 31, 2014 by balal*

**Calculus**

Find the distance from the point to the given plane. (1,−5,9), 3x+2y+6z=5

*January 31, 2014 by miolo*

**physics**

a plane travelling at 200.0m/s braked to a stop in 6.2s. what was its acceleration?

*August 10, 2015 by Anonymous*

**Math**

How do you graph mixed fraction from a table on a coordinate plane ?? Thanks

*August 18, 2015 by Mariam*

**MATH ANSWER HELP**

Graphing in the Coordinate Plane Unit Test

*May 5, 2016 by john hobert*

**managerial economics**

In 1991 the Air Force awarded a $93 billion (or more) contract to a group led by Lockheed, Boeing, and General Dynamics to build the new fighter plane for the 21st century, the YF-22 Lightning 2. A group headed by Northrop and McDonnell Douglas, which had spent more than $1 ...

*August 8, 2010 by tina*

**Health / PE**

1. A person who does not recognize the signs of mental illness may not know he needs help. A. True B. False 2. Which of the following is not a sign of psychotherapy? A. insight B. cognitive C. medications D. group 3. Which is NOT a health professional who treats mental and ...

*November 12, 2015 by Cami *

**math trigonometry**

1. Two straight roads intersect to form an angle of 75". Find the shortest distance from one road to a gas station on the other road 10o0 m from the junction. 2. Two buildings with flat roofs are 60 m apart. From the roof of the shorter building, 40 m in height, the angle of ...

*January 4, 2013 by mikee*

**math**

Two sides of a triangle have lengths 8 m and 24 m. The angle between them is increasing at a rate of 0.05 rad/s. Find the rate at which the area of the triangle is changing when the angle between the sides of fixed length is 135°. Round your answer to two decimal places. So it...

*October 20, 2013 by christina*

**Physics**

A weight of 690 N is held by two cables. The left-hand cable had tension T2 and makes an angle of 41◦ with the ceiling. The right-hand cable had tension T1 and makes an angle of 42◦ with the ceiling. What is the tension in the cable labeled T1 slanted at an angle ...

*December 8, 2014 by Jack*

**chemistry**

When 18 g of ethylene glycol C2H6O2 is dissolved in 150 g of pure water, the freezing point of the solution is ___ (degrees)C. ( The freezing point depression constant for water is 1.86(dgrees)C kg/mol. I know the formulas I just need to see it done step by step please.

*August 4, 2008 by Jared*

**Physics **

The position ModifyingAbove r With right-arrow of a particle moving in an xy plane is given by ModifyingAbove r With right-arrow equals left-parenthesis 3 t cubed minus 2 t right-parenthesis ModifyingAbove i With caret plus left-parenthesis 5 minus 2 t Superscript 4 Baseline ...

*September 25, 2015 by barich*

**math**

Find an angle between 0 degree and 360 degree that is coterminal with given angle. a. 361 degree b. -100 degree c. 1270 degree

*October 26, 2009 by David*

**Geometry**

I have a circle with a Tangent line, DE, running along it and connecting with another line, FC, which runs through the center of the circle to the other side.I have connected the center of the circle with point E on the edge of the circle with a radius. I have labeled the ...

*June 3, 2009 by Aaron*

**Geometry**

I have a circle with a Tangent line, DE, running along it and connecting with another line, FC, which runs through the center of the circle to the other side.I have connected the center of the circle with point E on the edge of the circle with a radius. I have labeled the ...

*June 3, 2009 by Aaron*

**phsyics**

Light enters a plate of borosilicate crown glass at an angle of 40.2 degrees with respect to the nor- mal to the air-glass surface. If the index of refraction of the glass is 1.52, find the angle made by the refracted beam with the normal. Answer in units of .

*February 27, 2011 by leslie*

**Math**

1. You have 3500 in savings for 9 months at a rate of 4.5%. How much will you have at the end of that time? Ans. my book says: 3,618.13 I come up with: 118,125 2. Scale reads 1 inch = 24 inches for a house window. If window measures 1 3/4 inches, what is the actual length? Ans...

*November 28, 2012 by Edna*

**physics**

Suppose a stone is thrown at an angle of 30 degrees below the horizontal, if it strikes the ground 57m away, find (a)the time of flight, (b)the initial speed, and (c) the speed and the angle of the velocity vector with respect to the horizontal impact.

*October 16, 2011 by Gail*

**trig**

A tree on a hillside casts a shadow c ft down the hill. If the angle of inclination of the hillside is b to the horizontal and the angle of elevation of the sun is a, find the height of the tree. Assume a = 48°, b = 18° c = 235 ft. (Round your answer to the nearest whole ...

*November 29, 2012 by Anonymous*

**Physics**

VERY URGENT- A kicked ball takes off at 25m/s at an angle with the ground. If the goal is 50m away and the horizontal bar is 3.44m above the ground, what must be the elevation angle for the kicker to score a goal?

*February 26, 2014 by Samuel*

**Geometry**

The measure of an angle SUT is twice m<RUS. if m<RUS=(18x-8)degrees and m<TUS=(4x + 16) degrees. Find m<RUT. This is an acute angle. Please help. I have tried figuring this problem out a million and one ways. Thanks

*February 10, 2015 by Katie W*

**Physics**

A golf ball hit at a speed of 77 m/s will carry (achieve its maximum flight distance of) 256 m when driven at a launch angle of 16 deg. What would be its horizontal range in a vacuum if launched at the same speed and at the same angle ?

*February 18, 2016 by Edwin*

**physical science**

Light is incident on aplane mirror at an angle of 46 degrees relative to its surface. What is the angle of reflection? Your exact answer here: http://en.wikipedia.org/wiki/Reflection_%28physics%29 The angle of incidence equals the angle of reflection but these are relative to ...

*November 27, 2006 by Zuri*

**calculus**

a trapezoid is a quadrilateral with (only) two sides (called bases) that are parallel. an isosceles trapezoid has two equal legs. the area of a trapezoid is A=(1/2)*h*(b1+b2) where b1 and b2 are the two parallel bases and h is the altitude. your problem: a water viaduct has a ...

*November 17, 2011 by robert*

**Chemistry**

What is the freezing point (°C) of a solution prepared by dissolving 11.3 g of Ca(NO3)2 in 115 g of water? The molal freezing point depression constant for water is 1.86°C/m. (Note that when Ca(NO3)2 dissolves in water Ca2+ and NO32- ions are produced).

*May 25, 2012 by Henry*

**Geography**

In an effort to help Japan recover from the devastating effects of the 1929 depression, Japanese military leaders in the 1930s...? A. adopted a policy of imperialist expansion. B. formed an alliance with the Soviet Union. C. negotiated more trade treaties with the Soviet Union...

*April 12, 2010 by Greiye*

**History/9th grade**

I am trying to understand and I hope you can help me. I just want some more explaintion about the great depression. Why do people call it a leveler? I heard some kids over at the table next to me at lunch today. Like I said I just want to know. I am studing about presidents ...

*May 4, 2010 by Nanci*

**physics**

Why is white light separated into a spectrum of colors when it is passed through a diffraction grating? The diffraction angle (theta) is given by n x (lambda) = d sine(theta) where lambda = wavelength theta = diffraction angle d = grating spacing n = order (1,2,3 etc.) so each...

*April 27, 2007 by anonymous*

**physics**

i have to do an experiment to "determine the relationship between the angle of the rampand speed of an object sliding down it" i was told i had to have a few variables. -controlled(keep the same) -independent(change 1 thing) -dependent(measure 1 thing) so if the angle of my ...

*February 3, 2010 by bjc*

**Geometry**

pa and pb are tangents to circle from point p. chord ab is drawn. find the number of degrees contained in angle pab if angle apb contains a)80 degees b 40 degrees c) 60 degrees d) 90 degrees e) 120 degrees can some1 pllllz explain this 2 me!

*March 2, 2011 by Summer*

**Physics**

A wheel's uniform angular acceleration is constant. Initially its angular velocity is zero. During the first 1.0 s time interval, it rotates through an angle of 90.0°. (a) Through what angle does it rotate during the next 1.0 s time interval? (b) Through what angle during the ...

*March 25, 2012 by Adam*

**geometry**

Assume triangle JKL is in the first quadrant, with the measure of angle K = 90°. Suppose triangle JKL is a 30°-60°-90° triangle and segment JK is the side opposite the 60° angle. What are the approximate coordinates of point L? j(2,7) k(2,2) a(4.9,2) b(4.5,2) c(7.1,2) d(8.7,2)

*February 22, 2012 by steve*

**geometry**

I am really stuck on a couple of these. 2 column proof Given: FH is congruent to GE and angle HFG is congruent to angle EGF Prove: triangle GEH is congruent with triangle FHE.

*December 29, 2012 by linda*

**math**

I am really stuck on a couple of these. 2 column proof Given: FH is congruent to GE and angle HFG is congruent to angle EGF Prove: triangle GEH is congruent with triangle FHE.

*December 29, 2012 by linda*

**math **

One interior angle of a triangle has a measure that is equal to the sum of the measures of the other two angles of the triangle. What is the measure of the smallest exterior angle of the triangle in degrees?

*March 11, 2015 by G*

**math**

the number of noncollinear points needed to determine a circle Two. The location of the center, and one point on the circle (ie, the length of radius), you have determined the circle. However, the circle thus determined can be an an infinite number of planes (not just in the ...

*October 15, 2006 by sarah*

**Physics**

A pendulum oscillates at a frequency of 2 cycles per second. At t = 0 it is released starting at an angle of 20°C. Ignoring friction what will be the position (angle) of the pendulum at a. t = 0.25 sec b. t = 1.6 sec c. t = 5.0 sec

*February 16, 2011 by Cole*

**plss answer fast math algebra**

the ratio of the measure of the complementsof two angle is3:4while the ratio of the measure of their supplements is 9:10 find the measure of each angle.

*October 11, 2013 by rhodora*

**physics**

Forces of F1=975 N,F2= 745 N, f3= 1175 N and are applied at the same point. The angle between f1 and f2 is 60.0 degree and the angle between f2 and f3 is 30.0 degree. F2 is between f1 and f3 find the resultant force.

*November 24, 2013 by carol*

**physics**

A plane flying horizontally above Earth’s surface at 184 meters per second drops a crate. The crate strikes the ground 30.0 seconds later. What is the magnitude of the horizontal component of the crate’s velocity just before it strikes the ground? [Neglect friction.] [1 ...

*November 4, 2011 by Jules*

**math**

In triangle ABC, angle C is congruent to angle A, line BC=2x-5, line AB=x+5 and line AC=x+10. Find x. The problem didn't have a triangle drawn so i drew it myself. I tried many equations but when i substitute it it didn't work.

*November 16, 2008 by mark*

**physics**

calculate the refractive index for a ray travelling from air to water given that the angle of incidence is 30degrees and the angle of refraction in the water is 22 degrees.Determine the speed of the ray in water.

*November 10, 2011 by ceasar*

**Social Studies (Check, Please!)**

1. Why did Hoover oppose the federal government's participation in relief programs? A: Hoover opposed the federal government's participation in relief programs because he believed that only state and city governments should dispense relief. 2. How did Americans react as the ...

*December 15, 2015 by Victoria*

**Geometry/Trig.**

For acute angle Aof a right triangle, find tan A by using the 45-45-90 Triangle Theorem or the 30-60-90 Triangle Theorem. measure of angle A=45 degrees.

*January 30, 2011 by Chica*

**math / science**

find the vector with all of the following properties: magnitude 10 angle of 45 degrees with positive x-axis angle of 75 with positive y-axis positive k component

*December 11, 2011 by Clarissa *

**Physics**

Mathematically determine the resultant force if two forces A and B act on an object. Force A is 85N and is at an angle of 20• to the horizontal. Force B is 125N and is at an angle of 60• to the horizontal.

*October 11, 2012 by Christian*

**Physics**

A 1.1 kg particle-like object moves in a plane with velocity components Vx = 30 m/s and Vy = 90 m/s as it passes through the point with (x, y) coordinates of (3.0, -4.0) m. (a) What is its angular momentum relative to the origin at this moment? _____ kg*m^2/s k (b) What is its...

*March 30, 2007 by COFFEE*

**Socials**

How did work camps and tariffs effect the Great Depression? What were the strength and weaknesses of these effects? workcamp- strength - men got to work weakness - ?? tariffs strength - protected Canada's profit weakness - slowed down trade

*February 1, 2009 by Sh*

**math**

A stirring blade is attached at the level of the center of the wheel. Find the distance from the center of the wheel to the stirrer blade for 30° and 225° angles of rotation. The radius is 2ft and the rod of the blade attached to the blade is 5ft long. Describe the distance of...

*February 11, 2016 by Anonymous*

**math 116**

Two angles are complimentary.The sum of the measure of the first angle and one fourth the second angle is 58.5 degrees. Find the measurements of the angles...the smaller one is ? and the larger one is?

*November 15, 2009 by TracyAnn*

**Math Trig**

I have to find the x (bottom length of the triangle) in a right triangle. angle A is 33.9 degrees angle B is 90 degrees and the height of the triangle is 3.3cm What formula do I use to figure out this question?

*January 7, 2013 by nj*

**physics**

A uniform string fixed at one end passes over a pulley and then is attached to a hanging object. The string is horizontal between the fixed end and the pulley. When you let the hanging object oscillate in the vertical plane, the fundamental frequency of the horizontal part of ...

*August 6, 2008 by Elisa*

**ap physics**

can you check my answers? 2.is more work required to bring a fully loaded truck up to a given speed, than the same truck lightly loaded? defend your answer? -more work is required to bring a fully loaded truck up to a given speed because it is doing more work since it is fully...

*October 16, 2007 by Elisabeth*

**Geometry**

To build a fence, Jim positioned the fence posts and then placed a 2 x 4 board at an angle between the fence posts. As he placed each picket, he measured the angle that the picket made with the 2 x 4. Why does this ensure that the picket will be parallel? - This ensure that ...

*November 15, 2010 by Shadow*

**Physics**

A high-voltage line of length 175 m is carrying a current of 105 A at a point on the earth where its magnetic field is 5 * 10^(-5) T and points North,34 degree from the vertical axis. A) what is the magnitude and direction of the force on the wire if the current is flowing ...

*March 6, 2008 by jenish*

**physics**

A high-voltage line of length 175 m is carrying a current of 105 A at a point on the earth where its magnetic field is 5 * 10^(-5) T and points North,34 degree from the vertical axis. A) what is the magnitude and direction of the force on the wire if the current is flowing ...

*March 8, 2008 by raks*

**kinematics**

A man stands on a slope of 20 degrees.His weight is 65kg. Given that the coefficient of static friction is 1.5, Calculate the maximum angle that the slope can have to the horizontal before he begins to slide. Also how does the pressure on his feet change with the changing ...

*March 8, 2012 by dmkp*

**physics**

for a free throw in basketball,find an equation for the final angle to go into the hoop in terms of y and x to the hoop and the initial angle. I can't seem to get an equation with only those variables. I always get stuck with others like time and velocity. how do i do this?

*February 3, 2008 by Mischa*

**alg 2**

evaluate cot 11 pie/6 to the nearest hundred angle given in radians.. is there a way to put this in calculator. another ? use a calculator and inverse function to find radian measures of the given angle angles whose tangent is 4.21 is that 1.34 the answer?

*June 9, 2008 by jerson*

**10th grade Geometry**

How do you do this proof? "In circle O, line segment ABC and line segment ADE are secants. Prove that angle ADC is congruent to angle ABE. This is the diagram: img523.imageshack.us/my.php?image=diagram3.jpg

*February 23, 2009 by Tommy*

**PHYSICS**

A FIREWORKS ROCKET IS MOVING WITH A SPEED OF 45.0 M/S. THE ROCKET SUDDENLY BREAKS INTO TWO PIECES OF EQUAL MASS, WHICH FLY OFF WITH VELOCITIES V1 AND V2. WHAT IS THE MAGNITUDE OF V1? (THE ANGLE OF V1 WITH RESPECT TO THE ORIGINAL V DIRECTION IS 30 DEGREES WHILE THE ANGLE OF V2 ...

*October 16, 2009 by LIZ*

**physics**

The two angled ropes used to support the crate in the figure below an withstand a maximum tension of 1300 N before they break. The left angle is 30dregres, and the right angle is 45degrees. What is the largest mass the ropes can support? m=?

*September 20, 2010 by andrea*

**physics**

A long jumper travels 8.95 meters during a jump. He moves at 10.8 m/s when starts his leap. At what angle from the horizontal must he have been moving when he started his jump? You may need the double-angle formula: 2 sin u cos u = sin (2u)

*December 15, 2010 by sue*

**physics**

a long jumper travels 8.95 meters during a jump. he moves at 10.8 m/s when starts his leap. at what angle from the horizontal must he have been moving when he started his jump? you may need the double angle formula: 2 sin u cos u- sin (2u)

*June 24, 2011 by aimee*

**physics**

A narrow ray of yellow light from glowing sodium (λ 0 = 589 nm) traveling in air strikes a smooth surface of water at an angle θi = 16.5◦ . Find the angle of refraction, θr. Answer in units of ◦

*April 18, 2013 by Anonymous*

**Maths**

An aircraft which is maintaining a constant altitude of 1000 metre is travelling directly away from an observer. At a particular instant the angle of elevation is 52 degree and 12 seconds later the angle of elevation is 16 degree. Find the distance travelled in this time.

*April 29, 2013 by Shane*

**precalc**

When an airplane leaves the runway, its angle of elevation is 18 and its speed is 275 feet per second. Find the airplane’s altitude after one minute (60 seconds). Assume a constant angle of elevation. Draw the scenario, if you can.

*May 5, 2016 by victoria*

**Chemistry**

If the freezing point of pure toluene is -95.15 oC and its freezing point depression constant is -8.38 oC/molal, what is the freezing point of a solution made by dissolving 39.338g of anthracene (C14H10) in 150.0mL of toluene? (Density of toluene = 0.8669g/mL)

*January 30, 2013 by Jaden*

**math**

an ultralight plane had been flying for 40 min when a change of wind direction doubled its ground speed. the entire trip of 160miles took 2h. how far did the plane travel during the first 40 min? Let V be the initial ground speed and 2V be the final ground speed, in miles per ...

*November 28, 2006 by suzy*

**History**

PLEASE HELP, I need to get this done in 2 hours 1. What was the effect of World War I on South Carolina? A. The state economy shrunk significantly. B. Citizens used more resources, such as meat and fuel, than before the war. C. Factory production slowed and trade decreased ...

*April 1, 2015 by Sterling*

**math**

an airplane is flying at a constant altitude of 28000 meters. when first seen to the east of the observer, the angle to the airplane is 71.5 degrees. after 73 seconds, the angle of elevation is 51.6 degrees. find the speed of the airplane.

*February 19, 2008 by Kindell*

**MATH**

The exterior angle of a regular polygon is the angle formed by an extended side and the adjacent side. a)what is the measure of each interior angel of a regular pentagon. (There is apicture on the page and each side measures 21mm) Help please.

*May 17, 2009 by CAITLIN D.*

**Physics**

Solve this question, the resultant of two force acting at right angle to each other on a body is ten newton. If the angle between the resultant and one of the force is sixty degree, find the force.

*October 12, 2011 by Adeleke*

**Math**

Traveling across a flat land you notice a mountain of f in the distance with an angle of elevations 3.5 degrees. You walk toward the mountain 13 more miles and now the angle of elevation is 9 degrees. How tall is the mountain?

*June 23, 2016 by Gabby *

**geometry**

The measure of an angle of a parallelogram is 12 degrees less than 3 times the measure of an adjacent angle. find the measure of all the interior angels of the parallelogram.

*February 23, 2011 by Sarah*

**Cosmology**

A Megaparsec is: - The distance to the Andromeda galaxy - The distance from which 1 AU subtends an angle of 1 microarcsecond - The distance from which 1 AU subtends an angle of 1 arcsecond - The size of the observable universe

*January 8, 2013 by qwerty*

**Math**

the measure of an exterior angle of a trangle is 125 the measure of one of its remote interiot angles is 65 what is the measure of the other remote interior angle

*November 9, 2015 by Anonymous*

**english**

Any idea's of an epigram for a biography on the Wright Brothers? (eg. he who fly's the plane etc)

*November 10, 2007 by Samantha*