Wednesday

May 4, 2016
Total # Posts: 4,816

**Trig - Law of sines and cosines**

ABC is an equilateral triangle with side length 4. M is the midpoint of BC, and AM is a diagonal of square ALMN. Find the area of the region common to both ABC and ALMN. I drew the diagram but I don't know how to find the answer? I think it has something to do with the law...
*November 19, 2013*

**English**

C thermometer measures heat seismograph measures tremors (record and measure earthquakes)
*November 19, 2013*

**English**

which analogy
*November 19, 2013*

**English**

remember, a toe is part of the foot(there are 5 toes on a foot) which of the answers is part of another thing(there are 5 of the first on the second)
*November 19, 2013*

**Math**

(1.035)^years * 1500
*November 19, 2013*

**Science please**

google it Thermal, or heat energy Chemical Energy Electrical Energy w w w . nmsea . o r g /Curriculum/ Primer/ forms _ of _ energy . htm
*November 19, 2013*

**Trigonometry/Geometry**

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 ...
*November 19, 2013*

**Math (ALGEBRA)**

–2x(–3x 2y)(2y) = ? A. 12x3y2 B. –3xy2 C. 3xy2 D. –12x3y2
*November 15, 2013*

**Math**

y = 9 x = 12
*November 14, 2013*

**Math**

x+y = 21 x = y + 2 2y + 2 = 21 y = 19/2 x = 23/2
*November 14, 2013*

**Trigonometry - Identities**

Thanksa lot
*November 14, 2013*

**Trigonometry - Identities**

If tan 2x = - 24/7, where 90 degrees < x < 180 degrees, then find the value of sin x+ cos x. I applied various identities and tried manipulating the problem to get sin x + cos x = sin(arctan(-24/7)/2) + cos(arctan(-24/7)/2) I also played around with the half-angle ...
*November 14, 2013*

**math**

D yup xD
*November 14, 2013*

**Math**

500% roughly
*November 14, 2013*

**chemistry**

that was from y ahoo answers by the way
*November 13, 2013*

**chemistry**

Um...kinda hard to draw but from google you get: hydrogen gas and a nickel catalyst is the conditions for hydrogenation and/or carbonyl reduction. Since you have an alcohol, we can assume that there was a carbonyl reduction. To draw the starting material, start by drawing the ...
*November 13, 2013*

**Trigonometry - Identities and proof**

Show that cot((x+y)/2) = - (sin x - sin y)/(cos x - cos y) for all values of x and y for which both sides are defined. I tried manipulating both sides in terms of trig identities but I don't really have a solution....help would be appreciated, thanks.
*November 13, 2013*

**math**

0.5 + 2 = 2.5 2.5 / (1/4) = 2.5 / 0.5 = 5
*November 13, 2013*

**ELA? Check answers!!**

Was there some text? That might have been helpful when posted. Anyways, Your first answer was right, and the 2nd answer depedns on the text. The third answer, I would say it is interrogative because you need to ask a question to monitor a person's comprehension So the ...
*November 13, 2013*

**math**

7 * 3 * 2 = 42
*November 13, 2013*

**Algebra, URGENT!!!**

1) Mio can build a large shed in 15 days less than Yuuko can. If they build it together, it would take them 18 days. How long would it take each of them working alone? 2) If Kamina can do a job in 29 hours and Simon and Kamina working together can do the same job in 10 hours, ...
*November 13, 2013*

**Trigonometry - Proofs**

Prove that the average of the numbers n sin (n degrees) (n = 2, 4, 6, ... 180) is cot (1 degree) Hint: Express everything in terms of sin and cos. Can you rearrange the result into a form that allows you to use some of the identities you've learned? How to start? I know I ...
*November 12, 2013*

**supply chain**

Suppose that a manufacturer of men's shirts can produce a dress shirt in its Houston, Texas, plant for $8 per shirt (including the cost of raw materials). Chicago is a major market for 100,000 shirts per year. The shirt is priced at $15 at Houston. TransportaÂ¬...
*November 8, 2013*

**Physics Classical Mechanics**

Please don't spam post all your questions: we probably won't answer you. Also, could you tell us how much you have worked on these problems?
*November 7, 2013*

**Math**

2/3 = 12/x corss multiply we get 2x = 36 x = 18 6/11 = 84/x cross multiply we get 6x = 11 * 84 x = 154 same thing for 3, 22h = 55*12 2 h = 5*12 h = 30
*November 7, 2013*

**Math-Trigonometry**

THAT HELPED ALOT THANKS
*November 7, 2013*

**Math-Trigonometry**

Show that if x, y, and z are consecutive terms of an arithmetic sequence, and tan y is defined, then (sin x + sin y + sin z) / (cos x + cos y + cos z) = tan y. So I tried letting x = y-k (since x,y,z are consecutive terms of an arithmetic sequence), then z= y+k So we get (sin(...
*November 7, 2013*

**BUSINESS MATH**

9.8 * 40 + 9.8*1.5*4
*November 7, 2013*

**Math**

a. 1 - (1/2 * 1/2 *1/2 + 1/2*1/2 + 1/2) b. 1/2 * 1/2 * 1/2 + 1/2 * 1/2) c. 1/2 + 1/2*1/2 d. 1/2*1/2*1/2*1/2*1/2 It should be that, I might be wrong though
*November 7, 2013*

**Math**

6 51 not that hard think hte highest number of 0,1,2,3,4,5 - its 5, then the highest numebr in the row, its 1 So, 5 1 = 51 smallest number = smallest number of 0,1,2,3,4,5 - its 0, then the smallest nuber, its 6 0 6 = 6
*November 7, 2013*

**Calculus I**

How did you get 16t^2?
*November 6, 2013*

**Calculus I**

A zombie steps off a 35-foot wall by mistake, landing in the river below. How long will it take the zombie to fall?
*November 6, 2013*

**Science**

Check the site that Elena gave the lenntech one -it gives chemical properties. Pretty detailed, too.
*November 6, 2013*

**Science**

Go to Google --> Periodic table ---> properties. Not that hard -.-
*November 6, 2013*

**Math-Trigonometry**

Thanks a ton!
*November 6, 2013*

**Math-Trigonometry**

Show that if A, B, and C are the angles of an acute triangle, then tan A + tan B + tan C = tan A tan B tan C. I tried drawing perpendiculars and stuff but it doesn't seem to work? For me, the trig identities don't seem to plug in as well. Help is appreciated, thanks.
*November 6, 2013*

**algebra**

a*z^2 + b*z^2 + a*z^3 + b*z^3 reorder: a*z^3 + b*z^3 + a*z^2 + b*z^2
*November 6, 2013*

**math**

the pattern is 2, 4, 6, 8, ..... 2+4+6+8+10+12+14+16+18 = 90 Thus for the next, there will be 10 red and 10 green. So, there will be 10 more red than green: x+y = 100 x=y+10 y = 45 x = 55 So, x, or the number of red beads is 55
*November 6, 2013*

**internet**

If I don't misunderstand, it means "What does the news say about the subject/topic?"
*November 6, 2013*

**Science**

You are not aloud to use outside help when doing a test. The answer is not C. That is all I can help with. I know what school you are in, I just did this test.
*November 6, 2013*

**Math - Trigonometry**

Yay thanks man for the help
*November 6, 2013*

**Math - Trigonometry **

Let f(x) be a polynomial such that f(cos theta) = cos(4 theta) for all \theta. Find f(x). (This is essentially the same as finding cos(4 theta) in terms of cos theta; we structure the problem this way so that you can answer as a polynomial. Be sure to write your polynomial ...
*November 6, 2013*

**Chemistry**

List the following compounds in order of increasing electrical conductivity: 0.1 M formic acid (HCOOH), 0.1 M (NH4)3PO4, 0.1 KCl, and 0.1 M glucose solution (C6H12O6). Why are they in that order?
*November 6, 2013*

**Math**

THANK YOU SO MUCH!
*November 5, 2013*

**Math**

An equation of the tangent line to the curve y=f(x)=x(4cosx−6sinx) at the point (3f(3)) is y =? Note: Please follow these instructions carefully: (a) Express f(3) and f(3) in terms of . Simplify those expressions by evaluating the exact values of sin(3) and cos(3). (b) ...
*November 5, 2013*

**Math - Trigonometry**

Thanks a lot :)
*November 5, 2013*

**Math - Trigonometry**

If sin theta +cos theta =1.2, then what is sin^3 theta + cos^3 theta? Hmm...I don't understand how to proceed. I know I must apply a trig Identity, but which one? Thanks in advance
*November 5, 2013*

**Math**

in a relationship between variable called that changes in response to another variable? function input function independent variable dependent variable (my choice)
*November 1, 2013*

**Science**

lungs -_-
*October 31, 2013*

**Physics**

A flowerpot falls from a window sill 28.6 m above the sidewalk. What is the velocity of the flowerpot when it strikes the ground? The acceleration of gravity is 9.81 m/s2 . Answer in units of m/s
*October 31, 2013*

**English **

which of the following statements about american romantic poetry is not true? A)it followed a fixed rhyme scheme B)its themes originated in British literature C)it was influenced by Gothic literature D)it was filled with emotion
*October 31, 2013*

**Science**

The answer is not A. That is all I will help with. You are not aloud to use outside help when doing a test.
*October 31, 2013*

**Trigonometry**

Thanks a lot man ^_^ Much appreciated :)
*October 31, 2013*

**Trigonometry **

A calculator is broken so that the only keys that still work are the sin, cos, tan, cot, sin^-1, cos^-1, and tan^-1 buttons. The display initially shows 0. In this problem, we will prove that given any positive rational number q, show that pressing some finite sequence of ...
*October 31, 2013*

**Science**

More or less a fruit. But because of the taste, people say it's a vegetable. (It's still a fruit though ;) )
*October 31, 2013*

**Substution Soluton MATH**

1. subtituting we get -5x + 2 = 3x-14 so we get 8x = 16 and x=2, then plugging back in we get y = 2*-5 + 2 = -8 2. subtracting first from second equation gives us 4x = 4 so x = 1, and y = -1 3. 4x + 2 = 8 so 4x = 6, and x = 3/2 also thus 3/2*6 + 2y = 4 2y= -5 y = -5/2 maybe ...
*October 31, 2013*

**help...**

Hi writeacher how do you post urls?
*October 30, 2013*

**Trigonometry - Checking my work**

Oh thanks that helped a lot :)
*October 30, 2013*

**Trigonometry - Checking my work**

Find the sum of the three smallest positive values of theta such that 4 cos^2(2theta-pi) =3. (Give your answer in radians.) Hi guys, I've been struggling with this problem. Here's my thinking about the problem: we can rewrite the equation as cos^2(2theta-pi) = 3/4 Then...
*October 30, 2013*

**Graphing - Trigonometry**

thanks a lot steve you're awesome and helping me a lot on these problems I've tried working on them and when I couldn't you helped me so thanks
*October 29, 2013*

**Graphing - Trigonometry**

thanks a lot man :)
*October 29, 2013*

**Graphing - Trigonometry**

Below is the graph of y = a cos(bx+c)+d, where a, b, and c are positive, and c is as small as possible. Find a + b + c + d. prntscr. com/20mkyo The link is to a screenshot of the graph. (without spaces) I'm unsure of how to solve - I tried it and got y = 2 cos (2/3x + 5pi/...
*October 29, 2013*

**Math**

3*(-3)^3 *(2)^2 + (-3)(6)^2 = -27*3 * 4 + -108 = -324 + -108 = -432 :D
*October 29, 2013*

**math**

Multiplicative Property of Equality The formal name for the property of equality that allows one to multiply the same quantity by both sides of an equation. This, along with the additive property of equality, is one of the most commonly used properties for solving equations. ...
*October 29, 2013*

**Math**

3 yards = 9 feet because 1 yard = 3 feet 9 feet / 18.75 in = 9*12 / 18.75 = 108/18.75 = 5.76 She can make 5 frames with some wood left over. This makes sense because 18 3/8 in is about 1 foot and 1/2 so thus 9 / 1.5 = 18/3 = 6 about. Since it is a bit over thus it is 5.
*October 29, 2013*

**Math**

5100???
*October 28, 2013*

**Trigonometry**

Thanks man
*October 27, 2013*

**Trigonometry **

For 0<x<pi/2, sin x and cos x are both less than 1 and greater than 0 (easy to see). We are also given that sin^2x+cos^2x=1. Use this to show that sin^7x+cos^7x<1 for 0<x<pi/2. Unsure on how to proceed?
*October 27, 2013*

**Math/Probability**

The random variable X has a log-normal distribution, when the mean of ln(X) = 5.45 and variance of ln(X) = 0.334, what is the probability that X >139.76?
*October 27, 2013*

**chemistry**

Why do acids and bases conduct electricity?
*October 26, 2013*

**physics**

The coefficient of restitution for a particular ball is 0.45. If he ball hits a surface traveling at 100 m/s its rebound speed will be
*October 25, 2013*

**science**

What are the right answers?
*October 25, 2013*

**science**

same here. please!
*October 25, 2013*

**6th Grade Math**

4 exponent 3 x 5 exponent 2
*October 24, 2013*

**math**

Using These Numerals 1,9,9,6 in the same order how can you make the numbers 73 76 77
*October 23, 2013*

**math**

add 7 to both sides : 21E + 7 -7 = 0+7 21E = 7 divide both sides by 21 21E / 21 = 7/21 E = 1/3 :D
*October 23, 2013*

**English ---- check grammar---**

Um That is a long paragraph... Later, when I was old enough to understand, I was lectured on how to cook stew. But I never learned how to cook the dish correctly, as done by my grandmother. needs a "However," instead of "But" I don’t remember exactly ...
*October 23, 2013*

**Chemistry**

List a series of test that would determine the order of activity (least active to most active) for the following metals: Zn, Mn, and Ag.
*October 22, 2013*

**writing**

URGENT Please remove thread as previously requested asap. Thank you. Writing Sam, Monday, October 21, 2013 at 5:46pm
*October 22, 2013*

**English**

Urgent. Please remove thread asap. English Sam, Monday, October 21, 2013 at 5:50pm Thank you
*October 22, 2013*

**World History**

When might Sieyes claim that women would be eligible for the equal rights that Etta Palm d'Aelders states that they rightfully deserve?
*October 21, 2013*

**math 9**

Thank you Kimmy!!
*October 20, 2013*

**math 9**

Identify the solution(s) of the system of equations, if any. 3x-2y=6 5x=5-25y A) (28/13, 3/13) B) (-3/17, 32/17) C) (32/17, -3/17) D) (32/9, 7/3) I think the answer is D but i did my check and still comes out incorrect
*October 20, 2013*

**Chemistry **

When CuCl2 and NH4OH are combined what is the product formed?
*October 20, 2013*

**Chemistry **

When CuCl2 and NH4OH are combined what is the product formed?
*October 20, 2013*

**Chemistry **

When CuCl2 and NH4OH are combined what is the product formed?
*October 20, 2013*

**math 8**

Actually it is C not B
*October 20, 2013*

**math 8**

thank you!
*October 20, 2013*

**math 8**

Identify the solution(s) of the system of equations, if any. 5x + 2y = 2 4x - 2y = 8 A) (9/10, -5/4 ) B) (–6, 16) C) (10/9, -16/9 ) D) (10, –24)
*October 20, 2013*

**math 5**

Identify the solution(s) of the system of equations, if any. 3x+2y=4 5x-4y=3 A) (1, 0.5) B) (0.5,1) C) (5, 5.5) D) 5/11, -2/11)
*October 20, 2013*

**Math 6**

Identify the solution(s) of the system of equations, if any. -3x-4y=2 8y=-6x-4 A) infinitely many solutions B) (-16/9, 5/6) C) (-2/3, 0) D) no solution
*October 20, 2013*

**math 4**

Identify the solution(s) of the system of equations, if any. 6x + 2y = 0 y = 1 - 5x A) (–1.5, –0.5) B) (–1.5, 0.5) C) (–0.5, –1.5) D) (0.5, –1.5)
*October 20, 2013*

**Math 3**

Identify the solution(s) of the system of equations, if any. x + 2y = 6 3x - 6y = 0 A) (3, 2/3) B) (3,3/2 ) C) (2/3, 3) D) (3/2, 3)
*October 20, 2013*

**Math 1**

Consider the following system of equations. y = 4x - 4 y - 4x = 3 What can you conclude about the system of equations? A) The system of equations is inconsistent. B) The system of equations is dependent. C) The system of equations is independent. D) none of these
*October 20, 2013*

**math**

Identify the solution(s) of the system of equations, if any. -4x - 4y = 4 4y = -4x - 4 A) no solution B) (0, -1) C) (-1, 0) D) infinitely many solutions
*October 20, 2013*

**chemistry thermodynamics**

a sample of methane gas of mass 25g at 250k and 18.8atm expands isothermally until its pressure is 2.5atm. calculate the change in entropy.
*October 19, 2013*

**Math**

Tom took 4 secs to run 6 yards, Diane ran 5 yards in 3 secs. Who would get to 30 yards first?
*October 18, 2013*

**Can someone check these answer for me?**

Anons answers are correct because it goes along with the other 5 questions and i just got a 5/5
*October 17, 2013*