Monday
September 15, 2014

Posts by Sam


Total # Posts: 3,979

maths
underscore = ?
November 21, 2013

Math
0.721 x 100 means move decimal point to the right 2 spaces, so it should be 0.721 --> 7.21 ---> 72.1 72.1
November 21, 2013

Trig-Medians and law of cosines and sines
thanks a lot man!
November 20, 2013

Trig-Medians and law of cosines and sines
In triangle ABC, we have AB=3 and AC=4. Side BC and the median from A to BC have the same length. What is BC? Not making sense to me, I think the answer must be simple, but I don't know how to solve I applied the law of sines but to no avail. Help is appreciated, thanks.
November 20, 2013

math
use a calculator.... 25/41 is more than 1/2 13/30 is less thus 25/41 is greater
November 19, 2013

Maths
Uh......what...?
November 19, 2013

literature
the answer is definitely not c thats for sure I'd agree with you on the answer A since Franklin is sorta mocking the idea of witchcraft etc.
November 19, 2013

Advanced Functions
I guess so
November 19, 2013

Advanced Functions
Oh wow, we got teh same answer reiny cool
November 19, 2013

Advanced Functions
sin 60 cos 30 sin 120 (all degrees, not radians)
November 19, 2013

algebra
if you meant 499.79 - 15099000000 then the answer is -1509899500 please specify exatly what you mean it's not clear.
November 19, 2013

Chemistry
2.
November 19, 2013

English
what do you do in church, you meditate. so I'd say rink because what do you do in a rink, you skate.
November 19, 2013

6th grade math
yup you're right,
November 19, 2013

Trig - Law of sines and cosines
Thanks a lot
November 19, 2013

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
yep
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

English
no
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. Transporta¬...
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

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

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

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
same here. please!
October 25, 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

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