Tuesday

December 6, 2016
Number of results: 21,379

**Physic **

what is the focal length of a plane mirrior which is 4m tall?

*June 9, 2011 by Daniel *

**geometry**

What is the perimeter of PQR with vertices P(–2, 9), Q(7, –3), and R(–2, –3) in the coordinate plane?

*September 22, 2011 by mike*

**Calc**

Find the point in which the line x=1-t, y=3t, z=1+t; meet the plane 2x-y+3z=6

*September 26, 2011 by mando*

**math**

If line l in the x-y plane contains the point (-2,1),(4,5) and (5,t), what is the value of t?

*October 26, 2011 by reena*

**Calculus**

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

*May 25, 2012 by j*

**Calculus**

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

*May 26, 2012 by j*

**Calculus**

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

*May 26, 2012 by j*

**Math**

find the distance between M(1; 0; -3) point and 2x-2y+z+7=0 plane

*January 18, 2013 by yoshii*

**math **

Which point is located on the y-axis of a coordinate plane? 6,0 3,2 6,6 0,6

*July 19, 2013 by sam *

**math **

Find the equation of the plane equidistant from the points (1,8,3) and 94,10,7)

*December 16, 2013 by Tristan*

**Vectors **

Find the equation of the plane equidistant from the points (2,8,3) and (4,12,9)

*December 17, 2013 by Anonymous*

**Math**

How to make an equation out of 0,5 and -3,-4 on a coordinate plane

*October 9, 2014 by Coleson*

**Math**

How to make an equation out of 3,3 and 0,1 on a coordinate plane

*October 9, 2014 by Coleson*

**math**

Find the distance between the point and the plane. (2, 5, 3) 3x + 2y – 3z = –6

*October 17, 2014 by Morgan *

**math**

Find the point in the xy plane which is equidistant from (1,1), (7,1), and (1,9). Please and thanks.

*May 6, 2016 by k*

**math**

Find the point in the xy plane which is equidistant from (1,1), (7,1), and (1,9). Please and thanks.

*May 7, 2016 by bong*

**maths**

find the distance between the point and the plane (2, 5, 3) 3x + 2y - 3z = -6

*August 31, 2016 by lottie*

**Physics**

A Hollywood daredevil plans to jump the canyon shown in the figure on a motorcycle. There is a 15. m drop and the horizontal distance originally planned was 60. m but it turns out the canyon is really 65.7 m across. If he desires a 3.2-second flight time, (a) what is the ...

*December 8, 2013 by Emily*

**Please check history**

Please check! What was the effect of the depression of the 1890s on South Carolina? a. Gold was discovered in Alaska. b. Many banks failed and railroads went bankrupt. c. Paper money was no longer backed by gold.*** d. Inflation caused farmers to run large debts.

*March 15, 2016 by Blair*

**algebra!**

If the measure of angle A is doubled and then decreased by 10 while the complement of angle A is decreased by one-third of itself, then these two anlges formed are still complementary. Find the supplement of angle A. Please explain so i could understand. thank you ! Isn't this...

*August 31, 2006 by Kelly*

**Trigonometry**

Hi, this question concerns a right angled triangle. If I know the hypotenuse of the triangle is 16cm and I know the adjacent side to an unknown angle is 14cm which trigonometric ratio would I need to find the unknown angle? Many thanks

*July 4, 2010 by Sam*

**geometry**

anthony is building a picnic table for his patio. he cut one of the legs at an angle of 40 degrees. at what angle should he cut the other end to ensure that the top of the table is parallel to the ground?

*November 1, 2011 by sam*

**math, functions **

stefan has set up a right triangle EFG on the side of a river such that FG measures 20m and angle DEF measures 60 degrees. EG bisects angle DEF. determine the width of DG.

*November 20, 2011 by yess *

**biomechanics**

a shot is released at a height of 1.89m, with a speed of 13m/s and at an angle of 34 degrees. Calculate the maximum height reached and the time at which this occurs, the range and the time of flight, and the optimum projection angle.

*February 16, 2012 by J*

**math**

a shot is released at a height of 1.89m, with a speed of 13m/s and at an angle of 34 degrees. Calculate the maximum height reached and the time at which this occurs, the range and the time of flight, and the optimum projection angle.

*February 16, 2012 by J*

**Yorktwon**

Use a straightedge and a compass to construct a triangle with 2 sides having the same length. Describe the process you used. Now use a protractor to measure each angle of the triangle. What are the measures of each angle?

*February 17, 2012 by Anonymous*

**geometry **

I relly need help on this question. "Determine whether the conjecture is true or false.Give an example if its false". Given: angle ABC,angle DBE are congruent. Conjecture:They are vertical angles.

*September 18, 2012 by stef*

**Math**

let AB and CD be perpendicular diameters of a circle. two chords AE and AF, which lie in the two different semicircles determined by the diameter AB are cut by the diameter CD in the points X and Y respectively. prove that angle EXF = angle EYF

*September 19, 2012 by Jun*

**math**

Two squirrels are sitting on a rope as shown. The tension in segment BD is TBD = 6.3 lb at an angle of ϕ = 47 degrees. The tension in segment AB is TAB = 5.229 lb. Find the weight of the squirrel at B and the angle α.

*December 6, 2013 by nick*

**Algebra**

Two angles are complementary. The larger angle measures 6 more than three times the smaller angle. Write an equation that can be used to find out the measures of both angles then simplify

*October 8, 2014 by Sandal*

**trigo**

two points A and B are 562 meter apart on a level stretch of road leading to a hill . the angle of elevation from A is 26degree 30minutes, and angle of elevation from B is 36degee 40minutes. how high is the hill ?

*January 12, 2015 by jilline*

**physics**

This green box, which has a mass of 500 kg, is hanging from the ceiling by two ropes. However, it's not quite centered correctly. Angle θ1=20.8 degrees and angle θ2=30.8 degrees. What is the tension in Rope # 2?

*March 5, 2015 by Jannatul *

**Trigonometry damon plz help**

If the angle of a h meters long tower is in a straight line between two observers A and B angle of elevation of the top of the tower from A and B are alpha and beta respectively and AB=D meters find h/d

*September 18, 2015 by Edward*

**Geometry help**

m angle 2 =34 degrees find m angle 1 Would appreciate the help on this one This is for long x that has 1 and 3 labeled top and bottom left side is labeled 4 right side is 2 That's what it looks like best I know how to describe it

*October 5, 2015 by sammy*

**Geometry**

In an isosceles triangle, line segment AC is congruent to line segment AB. Find the value of y in terms of x if one of the remote interior angle is y and the exterior angle is 3x+20. I think the answer is y=6x-140 but I don't know how they got it.

*December 8, 2015 by Ashley*

**Geometry**

I need help with this paragraph proof I have no clue what I am doing. Given: QS bisects angle PQR. Angle PQS equals 45 degrees. Prove: PQR is a right triangle. I really need help, I don't want to fail.

*September 13, 2016 by Kat*

**Physics**

A plane leaves Seattle, flies 79.0 at 22.0 north of east, and then changes direction to 48.0 south of east. After flying at 123 in this new direction, the pilot must make an emergency landing on a field. The Seattle airport facility dispatches a rescue crew. In what direction ...

*September 19, 2006 by Morgan*

**Math**

The difference between the smallest and second smallest angles of a quadrilateral is equal to the difference between the biggest and second biggest angles. If the biggest angle is twice the smallest angle, what is the measure of the smallest angle? (Solution pls... Tnx)

*January 26, 2015 by MNHS_HELP*

**math**

There are four angles, a,b,c,d. The measure of angle a is (3x+10) degrees. The measure of angle d is (x+10).What is the value of x? I made an equation 3x+10=x+10. I think the value is 0.

*February 9, 2008 by bob*

**math**

In a quadrilateral ABCD, the diagonal AC bisects angle BAD and AB = BC = CD. Prove that the other diagonal, BD, bisects angle ADC.

*August 7, 2010 by mathsen*

**trig**

When the sun's angle of elevation is 30 degree the shadow of a post is 6 ft longer than when the angle is 45 degree. find the height of the post

*January 16, 2011 by Cas'*

**geometry**

If two angles are complementary and the measure of one angle is 35 degrees, then the measure of the other angle is______ degrees.

*May 17, 2011 by Raven*

**gr10 science**

What is the index of refraction of a refractive medium f the angle of incidence in air is 30 degrees and the angle of refraction is 15 degrees?

*June 7, 2011 by Rebecca*

**Math**

Points K,L, and M are on line l in that order. N is a point not on line l. The measure of angle KLN is (3x+3) and the measure of angle NLM is (5x-7). What is the value of x?

*September 2, 2011 by Luke*

**MATH **

Ok when your plotting a graph of Sin angle i against Sin angle r , which of those goes on the y axix and which goes on x axis??

*September 6, 2011 by Nelly*

**geometry**

In an isosceles triangle, if a base angle has a measure of 43 degrees, then the vertex angle must have a measure of 80 degrees as well.

*November 1, 2011 by Anonymous*

**trig**

Find the length of side b to the nearest whole number if side a=105,angle A=65 degrees and angle B=37 degrees?

*January 25, 2012 by hd*

**trig**

(-10√2, -10√2), find te magnitude and direction angle of the vector, measure the direction angle in [0, 360). Please help!

*April 30, 2012 by Savannah*

**math**

Given a right triangle ABC, if the measure of angle B=30 degrees, the measure of angle C=90 degrees, and AB=5cm, find AC

*June 6, 2012 by martha*

**Math**

In a right triangle, the middle angle is 12 more than twice the smallest angle. What are the measures of the smallest and middle angles?

*October 9, 2012 by Jaime*

**Geometry**

ray OB is the bisector of angle AOC and ray OC is the bisector of angle BOD. m<AOD =120 find m<AOB

*September 5, 2013 by Sheila*

**geometry**

ABCD is a rhombus with diagonals Imported Asset and Imported Asset . Is angle ABD congruent to angle CBD?

*July 7, 2014 by Katie*

**math**

If ray BD bisects right angle ABC, the measure of angle ABD is A. 180 degrees B. 90 degrees C. 50 degrees D. 45 degrees

*August 13, 2014 by Balawal*

**Geometry **

Make a valid conclusion in the situation. -If the measure of an angle is 90 degree, then it is a right angle. The measure of <A is 90 degree. Plzzzz help me!!!

*September 11, 2014 by Mandeep*

**math**

Heong cut a slice of birthday cake . The slice formed the angle shown. What is the measure of the angle shown?

*April 20, 2016 by eman *

**physics**

a) A stepped optical fiber consists of a central cylindrical core of refractive index n1 and a cladding of refractive index n2. Show that the maximum acceptable angle at which light enters the plane end of the core of the fiber from air is èmax = (sin^-1) x [(n1^2)-(n2^2)]^-1...

*October 16, 2011 by Karaokyanus*

**Math - Geometry**

Two right triangles are touching at the tips. The left triangle has the 90 degree angle to the bottom left, and 33 degrees on the bottom right. Based on this info, the other angle is 57 degrees. The right triangle has the right angle given, but it is on the top right, and the ...

*December 1, 2007 by Nikki*

**Physics - Equilibrium**

A uniform ladder of mass M and length L leans at an angle theta against a frictionless wall. If the coefficient of static friction between the ladder and the ground is U, determine a formula for the minimum angle at which the ladder will not slip.

*April 18, 2008 by Nik*

**physics**

a uniform ladder of mass m and length l leans against fricitonless wall angle theta. If the coefficient of static friction between the ladder and the ground is u, find the formula for the minimun angle such that the ladder won't slip

*November 30, 2012 by ashley*

**trigonometry**

I wont be receiving credit for these problems but i was just wondering how would i answer them... A) The area of a sector of a circle with a central angle of 25π rad is 21 mm². B) The angle between 0 and 2π in radians that is coterminal with the angle 487π in ...

*April 13, 2015 by Michael*

**Physics**

Consider the 665 N weight held by two cables The left-hand cable had tension T2 and makes an angle of 43◦ with the ceiling. The right-hand cable had tension T1 and makes an angle of 48◦ with the ceiling. What is the tension in the cable T1 slanted at an angle of 48...

*March 15, 2012 by Ashley *

**physics**

the total electric field e consists of the vector sum of two parts. one part has a magnitude of e1 = 1284 n/c and points at an angle θ1 = 30° above the +x axis. the other part has a magnitude of e2 = 1833 n/c and points at an angle θ2 = 62° above the +x axis. find ...

*January 31, 2014 by katie*

**Chemistry(Urgent, please help,thank you)**

After performing a freezing point depression experiment I had to find the molecular weight of glycol. Now I have to answer the question what value did I assume "i" to equal and why did I make this assumption. My teacher told us the value of i to use for this was 1. I am not ...

*February 21, 2012 by Hannah*

**english**

Apparently with no surprise, To any happy flower, The frost beheads it at its play, In accidental power. The blond assassin passes on. The sun proceeds unmoved, To measure off another day, For an approving God. In the above poem, which of the following might the frost ...

*December 16, 2014 by 2phoneeeeee *

**Pre-Calc**

Consider a triangle ABC. C is a right angle, and side a is opposite angle A, side b is opposite angle B, and side c is the hypotenuse. The measure of side a= 2, side b= 7, and side c= 7.3 How do you find the angle measure of A and B based on the lengths of the sides? SinAngleB...

*September 19, 2006 by Chris*

**US history**

The GI Bill did all of the following EXCEPT: 1. provide educational benefits for veterans 2. pay veterans large bonuses to remain in the military 3. provide medical treatment for veterans 4. help prevent a postwar depression 5. provide housing loans for veterans I am pretty ...

*November 13, 2011 by HM*

**physics**

A pendulum is formed of a particle of mass 100g suspended from the end of an inextensible string of negligible mass and of length L=100cm. The pendulum is shifted by an angle of 60 degrees from its equilibrium position about a horizontal axis passing through the other end of ...

*September 21, 2016 by vicky*

**physics**

A pendulum is formed of a particle of mass 100g suspended from the end of an inextensible string of negligible mass and of length L=100cm. The pendulum is shifted by an angle of 60 degrees from its equilibrium position about a horizontal axis passing through the other end of ...

*September 21, 2016 by vicky*

**calculus**

An observer is 20 m above the ground floor of a large hotel atrium looking at a glass-enclosed elevator shaft that is 20 m horizontally from the observer (see figure). The angle of elevation of the elevator is the angle that the observer's line of sight makes with the ...

*November 9, 2014 by tom*

**Calculus**

An observer is 23m above the ground floor of a large hotel atrium looking at a glass-enclosed elevator shaft that is 15m 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**

an acute angle has how many degrees in it and how many degrees are in an obtuse angle

*March 13, 2008 by jerry*

**Math Check**

the angle with 60 degrees has a reference angle of 60 degrees?

*March 1, 2011 by Amy*

**physics**

8. a light beam enters a piece of window glass (n=1.47) at an incidence angle of 59. Find the angle it makes to the normal as it exists from the other side of the flat window glass. What general rule can you conclude?

*December 5, 2012 by alessandra*

**Maths**

Iam stuck.Please anyone help me. P and Q are two trees 490m apart beside a river. F is a flagpole on the other side of the river. If angle PQF=43 degree and angle QFP = 36 degree, Find the distance PF.

*April 15, 2013 by Shane*

**math**

Solution for: A man 1.7m tall observe that the angle of elevation of a top of a tower to be 28°.He moves 50m away from the angle of elevation to be 35°.How far above the ground is the tip of the tower to three significant figures.

*February 10, 2016 by Gyamfi*

**7th Grade Math**

What is the measure of an exterior angle of a regular polygon in which the sum of interior angle measures is 5400 degrees? A. 11.25 degrees B. 30 degrees C. 32 degrees D. 168.75 degrees

*May 5, 2013 by Hilda*

**history**

When the First World War ended, Americans welcomed what they hoped would be a “return to normalcy.” The decades that followed, however, are ones which would rarely be described as normal, in comparison to what came before or after. During these decades, a struggle ensued ...

*February 28, 2013 by Jessica*

**law and ethics -nursing**

What ethical dilema could a wife with cancer possibly face? What ethical dilema could her husband possibly face when he has depression that he doesnt treat? There son is a 24 year old whom has down syndrom and needs his parents for care.

*January 9, 2012 by john*

**trig**

From the top of a hill 700 ft. high, an observer notes that the angles of depression of two successive markerstones on a level ground, which leads straight away from the hill are 5 degree and 15 degree respectively. Find the distance between the two markerstones.

*January 14, 2012 by Grail*

**trigonometry**

From the top of a hill 700 ft high an observer notes that the angles of depression of two successive markerstones on a level ground, which leads straight away from the hill are 5 degree and 15 degree respectively. Find the distance between the two markerstones.

*January 18, 2012 by joan*

**Honors Geometry**

In a proof, I am given that Triangle GCF is congruent to Triangle GKF is congruent to Triangle JHM. Triangle GCF and Triangle GKF are Vertical Angles. I am also given that Angle C(on Triangle GCF) is 4y, and Angle G(on Triangle GKF) is 16y. So, obviously, the angle opposite it...

*November 3, 2010 by Brenna*

**chemistry**

Calculate the pH at 25 ° C when 120 mL of a HCl solution having a concentration of 50 mM is added 50.0 mL of a 120 mM ephedrine solution. Assume no change in temperature. Amitriptyline is a drug used in treating depression. It is typically formulated as the hydrochloride ...

*September 9, 2016 by Maria*

**Geometry**

I need help on these two. Consider tirangles ABC and DEF. Side A is congruent to side F. Angle A is congruent to angle F. Angle B is congruent to angle E. What postulate or theorem can be used to prove that the two triangles are congruent? If angle1 and angle2 are ...

*August 21, 2006 by Amy*

**physics**

A flea pulls on a puck with force 8 microN at an angle of 75°. Another flea pulls on the puck with force 2 microN at an angle of -45°. (See diagram for angle scale.) Draw vectors on the diagram to scale representing the forces. Carefully add the vectors tip-to-tail. (Use a ...

*May 19, 2010 by jon smith*

**Trigonometry**

A lookout spots a fire from a 36 meter tower the angel of depression from the tower to the fire is 21 degrees . To the nearest meter how far is the fire from the base of the tower

*March 5, 2012 by :)*

**physics**

Consider the 620 N weight held by two cables shown below. The left-handed cable had tension 550 N and makes an angle of è with the wall. The right-hand cable had tension 670 N and makes an angle of è1 with the ceiling. a.) What is the angle è1 which the right hand ...

*November 10, 2012 by Jeff *

**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 24, 2012 by Adam*

**Physics**

I have two I need help with! 1. An airplane is flying in a horizontal flight level at constant velocity, heading due east. If the weight of the plane is 2.6 x 10^4 N, what is the net force on the plane? a)-2.6x10^4 N b)2.6x10^4 N c)0.0 N d) that due to gravity, which is 2.5x10...

*September 5, 2010 by Johnny*

**Calculus / Rates of Change**

A jet flying due north at 16km/min passes 2 km directly above a plan flying due east at 8km/min. How quickly are they separating when the plane is 32 km from the crossover? What I have done (I am not sure if it is correct.): r^2=x^2+y^2+z^2 Since the plane has gone 32 meters, ...

*March 6, 2016 by Jermaine*

**Maths**

Pls i urgently need solution to this problems(1) in angle xyz. Y=298cm,z=51.4cm,x=196cm.solve the angle completely. (2). Calculate the values of anglesA and C of MABC where b=14.36cm a=7.82cm B=115.6cm. (3). a,A,angleC in angleABC given that b=17.23cm.C=10.86cm,B=101.30cm.thanks

*June 7, 2011 by Malosky*

**MATH**

Angle C and Angle D are vertical angles. The conclusion is that angle C and angle D are complementary. Which is a counterexample of this conclusion. * 2 vertical angles which are not complementary or * 2 complementary angles which are not vertical

*February 10, 2012 by Millie*

**physics**

consider the 666 N weight held by two cables shown below. The left hand cable and tension 530 N and makes an angle of theta2 with the ceiling. The right hand cable had tension 390 N and makes an angle of theta1 with the ceiling. What is the angle theta1 which the right hand ...

*November 14, 2014 by sally*

**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 *

**Geometry **

How to solve: the measure of an angle is 12 less than twice the measure of its supplement. What is the measure of the angle?

*September 30, 2010 by nikki*

**math**

if the measure of an angle exceeds four times the measure of its complement by 25, what is the measure of the angle?

*August 27, 2012 by Lisa*

**Math**

The measure of one angle is 38 degrees less than the measure of its supplement. What is the measure of each angle?

*June 12, 2016 by Jason*

**Geometry**

The measure of the complement of an angle is equal to 1/5 of the measure of its supplement. Find the measure of this angle.

*August 7, 2016 by Timur10393*

**math**

A diagram of airport runway intersections shows 2 parallel runways. A taxiway crosses both runways. If angle 8 measures 119, wwhat is the sum of the measures of angle 1 and 4? I think that the answer is 238. Is this right?

*November 23, 2007 by keisha*

**Geometry**

In Triangle RST, SR < ST and RT > ST. If angle R = 2x + 10 and angle T = 3x - 25, which is a possible value of x? f. 25 g. 30 h. 35 j. 40 So far I've just drawn a picture for reference and I've been pondering about the problem for about 15 to 20 minutes now. My question ...

*January 31, 2009 by Anonymous*

**Please Help!!!!!!**

A hot hair balloon is rising vertically 20 ft/sec while the wind is blowing horizontally at 15 ft/sec. Find the speed v of the balloon and the angle x it makes with the horizontal. I know how to solve this problem, but I don't understand why or how you know it's a right angle.

*November 21, 2011 by Desperate!!!!*