Wednesday

May 25, 2016
Number of results: 20,250

**math**

m of angle 7=2x + 10 m of angle 3=3x - 15
*September 16, 2010 by Nick*

**Math**

angle 2 =(4x + 4) angle 1 - 2x what is x
*September 16, 2012 by Dawson*

**physics**

A 15kg box is resting on a hill forming an angle of a horizontal surface. The coefficient of static friction for the box on the surface is 0.45. Calculate the maximum angle of the incline just before the box starts to move.
*October 22, 2010 by Samantha*

**hydrodynamics**

a kite weighs 2.50 lb and has an area of 8 square-ft. The tension in the kite is 6.6 lb when the string makes an angle of 45degrees with the horizontal. For a wind of 20 mph, assume an angle of 8 degrees with the horizontal. Consider the kite essentially flat plate
*November 25, 2011 by jolly*

**physics**

a boat can sail at 27 m.s in still water. the boat must cross a river that flows at 9 m.s towards the east . if the boat crosses the river by going up stream at an angle of 23 south, what will the size and angle of the resulting velocity be?
*February 9, 2012 by Zane*

**math**

A man walks directly from point A towards the foot of a tall building 240m away. After covering 180m, he observes that the angle of the top of the building is 45. Determine the angle of elevation of the top of the building from A.
*February 4, 2015 by king *

**math**

A uniform ladder of mass, m, and length, l, leans at an angle, theta, against a rough wall and is on a rough floor. Determine a formula for the minimum angle at which the ladder will not slip if a man reach the top of the ladder.
*June 23, 2015 by vidya*

**math**

A uniform ladder of mass, m, and length, l, leans at an angle, theta, against a rough wall and is on a rough floor. Determine a formula for the minimum angle at which the ladder will not slip if a man reach the top of the ladder.
*June 24, 2015 by vidya*

**math**

A uniform ladder of mass, m, and length, l, leans at an angle, theta, against a rough wall and is on a rough floor. Determine a formula for the minimum angle at which the ladder will not slip if a man reach the top of the ladder.
*June 24, 2015 by vidya*

**Math**

Match each ratio in the first row with an equivalent ratio from the second row if angle A plus angle B = 90 degrees. SinA CosA TanA CscA SecA CotA SinB CosB TanB CscB SecB CotB Pleaseeee help!!
*February 24, 2012 by krista*

**Trigonometry**

Mountain officials want to build a new ski lift from B to C as shown in the figure below. The distance from A to C is 1480 feet. They measure angle DAC to be 32 degrees and angle DBC to be 18 degrees. What is the distance A from to B? Round your answer to the nearest tenth of ...
*March 18, 2014 by Joey*

**Brain excel**

R and S are two observation posts on the same horizontal ground as the foot P of a vertical tower PQ.The tower is 18m due north of S and 24m east of R.The angle of elevation of Q from S is 35degree.calculate the height pQ,the distance RS,the angle of elevation of Q from S and ...
*November 11, 2015 by Zenny*

**Physic**

You pull a 30.5 kg wooden box with a rope that makes a 23.0° angle with the horizontal at a constant speed. The coefficient of kinetic friction between the box and the deck is 0.330. You pull the crate a distance of 5.25 m. How much work was done? Do you use f=ma and how does ...
*January 3, 2016 by H*

**PHYSICS**

A block with mass m1 = 9.0 kg is on an incline with an angle θ = 32.0° with respect to the horizontal. For the first question there is no friction, but for the rest of this problem the coefficients of friction are: μk = 0.28 and μs = 0.308. To keep the mass ...
*February 2, 2013 by HIBA*

**Geometry**

Given: Segment CE bisects <BCD; <A is congruent to <B Prove: Segment CE ll to segment AB -I used the exterior angle theorem to set the four angles equal to each other, but i don't know how to move on from there. The converse of something (maybe alternate interior ...
*November 8, 2012 by Kara*

**Physics -- URGENT**

Estimate the force a person must exert on a string attached to a 0.200 kg ball to make the ball revolve in a circle when the length of the string is 0.600 m. The ball makes 1.40 revolutions per second. Do not ignore the weight of the ball. In particular, find the magnitude of ...
*January 8, 2014 by Robert*

**Trig**

I don't know the physics behind Snell's Law, but I can do the math Snell's Law says sin(angle of incidence)/sin(angle of reflection) = refractive index since you know the two angles... sin45/sin27 = refractive index =1.5575365 so for an angle of refection of 25º sin(incidence ...
*April 19, 2007 by Reiny*

**physics**

A projectile is fired with velocity v at angle thita. Find the time when velocity of projectile will make angle 90' with initial direction of velocity?
*July 25, 2011 by Shivam*

**physics**

A projectile is fired with velocity v at angle thita. Find the time when velocity of projectile will make angle 90' with initial direction of velocity?
*July 25, 2011 by Shivam*

**Math (Please help immediately)**

Last one I need help on: The measure of one angle is 38 degrees less than the measure of its supplement. Find the measure of each angle.
*September 6, 2012 by C*

**Math (Please help immediately)**

Last one I need help on: The measure of one angle is 38 degrees less than the measure of its supplement. Find the measure of each angle.
*September 6, 2012 by C*

**Trig**

From a point 120 feet from the base of a plant building the angle of elevation to the roof line of the building is 38 degrees. The angle of elevation to the top of an antenna is 43 degrees. The antenna is attached to the nearest edge of the roof and the ground is flat. The ...
*October 24, 2012 by Dan*

**physics**

One strategy in a snowball fight is to throw a snowball at a high angle over level ground. While your opponent is watching the first one, a second snowball is thrown at a low angle timed to arrive before or at the same time as the first one. Assume both snowballs are thrown ...
*September 30, 2012 by tingting*

**Chemistry**

5.00kg glycol, C2H4(OH)2, [this is anti-freeze!] is added to your radiator. If your radiator contains 12.0kg of water, what would be the freezing point of the water-antifreeze mixture? The molal freezing point depression constant for water is 1.86 degrees celsius x kg/mole.
*March 20, 2011 by Cassie*

**engineering science**

a boat can sail at 27 m.s in still water. the boat must cross a river that flows at 9 m.s towards the east . if the boat crosses the river by going up stream at an angle of 23 south, what will the size and angle of the resulting velocity be?
*February 9, 2012 by Zane*

**MATH116**

Two forces of magnitudes 60 Newtons and 80 Newtons make an angle of 30 with each other and are applied to an object at the same point. Find the following: 1. the magnitude of the resultant force, and 2. to the nearest degree the angle it makes with the force of 60 Newtons.
*February 10, 2013 by Tricia*

**Trig**

a. What is the length of the hypotenuse of triangle ABC? b. What is the length of the shorter leg of triangle ABC? c. What is the length of the longer leg of triangle ABC? angle A=60, angle B=30, angle C=90 the triangle has a height of 10
*February 3, 2012 by BreAnne*

**physics**

An airplane flies at airspeed (relative to the air) of 400km/h. The pilot wishes to fly due North (relative to the ground) but there is a 110km/h wind blowing Southwest (direction 225º clockwise from North). In what direction should the pilot head the plane (measured clockwise...
*September 16, 2006 by puff puff*

**Physics-check**

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 17, 2007 by Elisabeth*

**Calculus**

An observer is 36m above the ground floor of a large hotel atrium looking at a glass-enclosed elevator shaft that is 26m horizontally from the observer. The angle of elevation of the elevator is the angle of the observer's line of sight makes with the horizontal (it may be ...
*March 10, 2015 by Zee*

**Math**

Use the figure to answer the following questions. figure for questions 1–3 1. Name a pair of complementary angles. (1 point) angle sign1 and angle sign4 angle sign1 and angle sign2 angle sign3 and angle sign4 angle sign1 and angle sign6 2. If mangle sign1 = 37°, what is the ...
*March 8, 2015 by Joe*

**Math**

Use the figure to answer the following questions. figure for questions 1–3 1. Name a pair of complementary angles. (1 point) angle sign1 and angle sign4 angle sign1 and angle sign2 angle sign3 and angle sign4 angle sign1 and angle sign6 2. If mangle sign1 = 37°, what is the ...
*March 10, 2015 by CONNEXUS ACADEMY*

**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 0.63 V and a current of 2.7 A are induced in the coil. The wire is then re-formed into a single-turn square coil, which is used in the same ...
*May 14, 2012 by M*

**The Ohio State University**

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 0.74 V and a current of 3.8 A are induced in the coil. The wire is then re-formed into a single-turn square coil, which is used in the same ...
*May 14, 2012 by Ryan*

**ONE world history question?**

1. All of the following events following WWI contribute to the beginning of WWII EXCEPT: Harsh peace terms angered Germany. Economic prosperity and increase in the European standard of living. The Great Depression allowed dictators to take control of European countries.*** if ...
*March 30, 2016 by Anonymous*

**Math**

1) Matt traveled the first leg of his trip for 1350 miles on a large jet. He then traveled an additional 600 miles on a private plane to reach his destination. If the speed of the jet was three times the speed of the plane and the total time in the air was 6 hours determine ...
*May 17, 2012 by Sara*

**Math**

The supplement of an angle measures 11 times its complement. Then the measure of the angle is... A. 9 degrees B. 81 degrees C. 90 degrees D. 99 degrees E. 100 degrees
*August 3, 2015 by Michelle *

**Math**

The given angle is in standard position. Determine the quadrant in which the angle lies. -25° A. Quadrant III B. Quadrant II C. Quadrant IV D. Quadrant I
*January 19, 2016 by Maddie*

**us history**

1. How did racism impact African American lives during the Great Depression and their access to New Deal programs? 2. How were African Americans able to create cultural power and how this impacted stereotypes and assumptions about the black community? 3. Who were some of the ...
*September 26, 2014 by Lavanessa Young *

**physics**

a roller coaster car moves 200 ft horizontally and then rises 135 ft at an angle of 30 degrees above the horizontal. It then travels 135 ft at an angle of 40 degrees downward. what is its displacement from its starting point? im not really sure what to do, I've drawn a graph ...
*September 2, 2008 by laura*

**physics**

school question? 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 kevin giordano*

**physics**

Consider the 692 N weight held by two cables shown below. The left-hand cable had tension T and makes an angle of θ with the wall. The right-hand cable had tension 760 N and makes an angle of 40◦ with the ceiling. a) What is the tension T in the left-hand cable ...
*September 19, 2010 by Cole*

**inverse trig function**

How do I do this by sketching a triangle. sin( arcsin(1/2) + arccos(1/2) ) Thanks. let's start with arcsin(1/2) draw a right angled triangle where theta and alpha are the two angles other than the 90º angle. suppose you make the opposite side 1, and the hypotenuse 2. Now look ...
*April 9, 2007 by Jen*

**Physics**

The 636 N weight held by two cables. The left-hand cable had tension 840 N and makes an angle of θ with the wall. The right-hand cable had tension 890 N and makes an angle of θ1 with the ceiling. a) What is the angle θ1 which the right-hand cable makes with ...
*January 9, 2011 by Mike*

**Physics**

The 636 N weight held by two cables. The left-hand cable had tension 840 N and makes an angle of θ with the wall. The right-hand cable had tension 890 N and makes an angle of θ1 with the ceiling. a) What is the angle θ1 which the right-hand cable makes with ...
*January 9, 2011 by Mike*

**Geometry**

I have four questions: 1. The area of trapezoid ABCD is 60. One base is 4 units longer than the other, and the height of the trapezoid is 5. Find the length of the median of the trapezoid. 2. In trapezoid ABCD, line BC is parallel to line AD, angle ABD = 105 degrees, angle A...
*December 6, 2014 by jared*

**psychology 220**

1.72 (1 pts.) Which of the following types of disorders would not meet the criteria for insanity according to the Insanity Defense Reform Act of 1984? A) schizophrenia B) major depression C) bipolar disorder D) antisocial personality disorder (my answer is "D antisocial ...
*December 9, 2012 by G. KAY*

**trig**

A coil of wire rotating in a magnetic field induces a coltage E=20sin((PIa/4) - (PI/2)). Use an identity to express this in terms of cos(PIa/4). Types of Identities: Double Angle, Half Angle, Sum and Difference of Sine, Cosine, and Tangent, Pythagorean, Reciprocal, Quotient. ...
*April 27, 2011 by Blake*

**Physics**

All answers should be in degrees. (a) Using the result of Lecture 31 Question 3, and Snell's law, derive and evaluate for the secondary rainbow for the following values of the incidence angle and index of refraction . 1 , 1.4 incorrect 45 , 1.3 incorrect 87 , 1.55 incorrect (...
*June 5, 2013 by P*

**pre-algebra **

Use the figure to answer the following questions. figure for questions 1–3 1. Name a pair of complementary angles. (1 point) angle sign1 and angle sign4 angle sign1 and angle sign2 angle sign3 and angle sign4 angle sign1 and angle sign6 2. If mangle sign1 = 37°, what is the ...
*February 26, 2016 by cupcakesss *

**geometry**

draw a triangle abc with abc ab =4.5 ,angle abc=35,angle acb=65
*November 26, 2012 by mudit*

**Math**

The measure of an angle is 4 times the measure of its complement. What is the measure of the angle's supplement?
*April 9, 2014 by Anonymous*

**geometry**

A loading dock ramp that is 14 feet long rises at an angle of 14.1° from the horizontal. Due to new design specifications, a longer ramp is to be used, so that the angle is reduced to 9.2°. How much farther out from the dock will that put the foot of the ramp?
*April 27, 2015 by houlh*

**science/math**

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*

**geometry**

An engineer determines that the angle of elevation from his position to the top of a tower is 55 degrees. The angle of elevation from 75 ft further away is 40 degrees. Determine the height of the tower to the nearest whole number.
*January 9, 2011 by Sebrenia*

**science**

The sun shines down on a mirror. The angle between the incident rays of sunlight and the vertical is 60o. What is the angle between the reflected rays and the vertical? I think the answer is 60 am i correct
*October 4, 2011 by Allison*

**vectors**

A box weighing 20 N, resting on a ramp, is kept at equilibrium by a 4N force at an angle of 20 degrees to the ramp, together with a friction force of 5N, parallel to the surface of the ramp. Determine the angle of elevation of the ramp.
*October 21, 2011 by Anonymous*

**math**

A tire swing is suspended from a tree. The swings height (in feet) above the ground is modeled by the equation, h = -12cos(x) + 15. (x is the angle measured in degrees). What is the height of the swing, when the angle is 60 degrees?
*November 13, 2011 by Anonymous*

**9th grade physics**

If a transparent material has a refractive of 2.0; a) calculate the critical angle b) if the refractive index were less than 2,0, would the critical angle be greater or less than before? Im super confused at this :(
*March 3, 2012 by Cathy*

**Maths**

A and B are two balloons at the same height and 1000 metre apart. O is a ground observation position. Angle AOX is 45 degree 15' and angle BOX is 10 degree and 30'. Find the height of the balloons.
*April 29, 2013 by Shane*

**Geometry**

at 10 feet away from the base of a tree, angle the top of a tree males with the ground is 61 degrees. of the tree grows at an angle of 78 degress with the respect to the ground, how tall is the tree to the nearest foot?
*June 1, 2014 by Walter*

**Trigo**

A vertical pole is standing on a slope that is inclined at an angle 8 degrees to the horizontal and casts a shadow that is 82 ft. long down the slope. How tall is the pole if the angle of elevation of the sun is 28 degrees?
*September 16, 2014 by Nik*

**Math**

Two ladders are the same distance from the base of a wall. The longer ladder is 15m long and makes an angle of 58 with the ground. if the shorter ladder is 12.6m long, what angle does it make with the ground?
*May 13, 2015 by Emily*

**Trigonometry**

Suppose *u* is a quadrant IV angle with cos(u) = 3/5. Suppose *v* is a quadrant IV angle with cos(v) = 12/13. Find the exact value of sin(u-v) I have gotten to sin120cos150 - sin150cos120 but I am not sure I am correct up to that point and I don't know where to go from there.
*April 17, 2016 by Lydia*

**Physics**

Consider a version of the atwood machine in which the masses are frictionless incline. The mass sliding on incline 1, m1, is 1.5 kg, and the angle of this incline is 62 deg. If the mass on the second incline, m2, is 2.5 kg, what is the angle 2 so that the system does not ...
*December 28, 2010 by rachel*

**Trigonometry**

Two sides of a triangle are 5 and 8 units respectively. If the included angle is changing at rate of one radian, at what rate is the third side changing when the included angle is 60 degrees?
*January 9, 2011 by may*

**physics**

Calculate the maximum height using the initial speed, half-time, and angle. The initial speeed is 18m/s, half time is 1.8, and the angle is 75. And how is this written out to solve.
*January 23, 2011 by Anonymous*

**Physics**

In an (x,y) co-ordinates system with x east and y north, an aircraft has the velocity components Vx = -170 ms-1 and Vy = 110 ms-1, and an acceleration of 6.4 ms-2 at an angle od 42 degree from the x axis. What is the angle of the velocity from the x=axis. And what is the y-...
*July 4, 2012 by Stupid Alex*

**Physics**

a shell is fired at a velocity of 300 m/s at an angle of 30. a. how far does it go? b. what are it's time of flight and maximum altitude? c. At what other angle could the shell have been fired to have the range?
*January 5, 2014 by Joyed*

**Angle of elevation**

A rocket fired straight up is tracked by an observer on the ground a mile away. a)Show that when the angle of elevation is theta, the height of the rocket in feet is h=5280tan(theta).
*February 6, 2014 by Kris*

**Circle geometry**

The endpoints of the arms of an inscribed angle are the endpoints of a diameter. What is the measure of the inscribed angle? How do you know? Please help and please explain how I would draw a diagram of thus. Think you for your help!
*April 23, 2014 by Cherie*

**Law of Sines**

In Triangle ABC, a=15cm, c=9cm, and angle C= 35 degrees. Find b and angle b. (Recall sin theta= sin (180 degrees-theta). I'm not sure how to approach this.
*September 6, 2014 by Richard*

**Math **

Two complementary angles, A and B, have measures in the ratio of 7 to 23, respectively. What is the ratio of the measure of the complement of angle A to the measure of the complement of angle B? Express your answer as a common fraction.
*March 4, 2015 by G*

**Physics**

A light Ray is incident at an angle of 45 degrees on one side of a glass plate of index of refraction 1.6. Find the angle at which the ray emerges from the other side of the plate
*August 4, 2015 by Gela *

**Calc.**

Determine the value of k so that the line with parametric equations x = 2 + 3t, y = -2 + 5t, z = k is parallel to the plane with equation 4x + 3y – 3z -12 = 0
*July 7, 2008 by Derek*

**english**

a special plane stood waiting for the president find the italicized word
*January 5, 2009 by yeshua*

**Math**

Which 3 x 3 matrix represents a reflection in the yz plane followed by inversion through the origin?
*February 24, 2009 by Alice*

**repost Calculus**

the length of the curve of intersection of the cylinder (4x^2) + y^2 = 4 and the plane x + y + z = 2 I'm so lost. Any help is appreciated!
*April 24, 2009 by Anonymous*

**Geometry**

draw a plane containing 4 coplanar points A, B, C, and D, with exactly 3 collinear poinys A, B, and D
*September 10, 2009 by Jameisha*

**Geometry**

Why is it impossible for a regular polygon with more than six sides to tessellate the plane?
*December 11, 2009 by Jackie*

**Math**

Why is it possible for a regular polygon with more than six sides to tessellate the plane?
*January 7, 2010 by Michelle*

**Math**

Find an equation of a plane through the point (1, 5, 1) which is orthogonal to the line x=3+5t y=5-1t z=-1+4t in which the coefficient of x is 5.
*February 1, 2010 by Derek*

**Calculus**

Find an equation of the tangent plane (in the variables x, y and z) to the parametric surface r(u,v) =(2u, 3u^2+5v, -4v^2) at the point (0,-10,-16)
*March 4, 2010 by Salman*

**Calculus**

Find an equation of the tangent plane (in the variables x, y and z) to the parametric surface r(u,v) =(2u, 3u^2+5v, -4v^2) at the point (0,-10,-16)
*March 4, 2010 by Salman*

**physics**

if a plane is flying 235 km/h and encounters west wind at 80 km/hr. What's its new velocity?
*September 1, 2010 by tatychass*

**geometry**

How do you use the distance formula to see if the segments on a cordinte plane are congruent?
*October 6, 2010 by Roberto*

**Linear algebra **

find an equation of a plane containing a point (0,6,-2) and parallel to vector v1= (0,-3,0), v2=(0,9,-1) Help!
*November 25, 2010 by J Velji*

**Math**

Let R be the plane region bounded by x=1, x=5, the x-axis and y=1/x. Approximate the are of R using 8 right rectangles.
*April 5, 2011 by Kelly*

**physcis**

use the principle of an incline plane and derive the coeffecient of stationary friction
*June 28, 2011 by merry light*

**physics**

a plane stops from 250 mph in 25 seconds. Calculate the planes acceleration
*September 24, 2011 by cj*

**calculus**

find the centroid of the plane region bounded by the curves y = cos x, y=sinx, x=0,
*October 31, 2011 by zoe*

**Calculus grade 12**

Explain why three directional vectors of the plane cannot me mutually perpendicular .
*May 3, 2012 by J*

**Calculus grade 12**

Explain why three directional vectors of the plane cannot me mutually perpendicular .
*May 4, 2012 by J*

**Calculus**

Find the vector and scalar equations of the plane containing the line r=(3,5,1)+t(-2,3,1) and the point (1,2,3)
*June 16, 2012 by Tom*

**physics**

two masses one on an inclined plane at 30 degrees the other suspended
*September 26, 2012 by k*

**maths**

the coordinates of a particle(m/s) in a plane at a given time(t),is 2t,t squared,determine of motion
*November 17, 2012 by oeme*

**maths**

find the equation of plane passing through point(0,7,-7) and containing line x+1/-3=y-3/2=z+2/1
*January 29, 2013 by Anonymous*

**algebra **

Write an inequality that describes the region of the coordinate plane not included in the graph of y<5x+1
*February 7, 2013 by Casey*

**Phyics**

How far does a 5-kg block with an initial speed of 3 m/s slide up a frictionless 28° incline plane?
*February 17, 2013 by Amy*

**Physical science**

How to draw 5 kg block on an inclined plane that isat 40 degrees to the horizontal?
*March 15, 2013 by Simphiwe*