Friday
December 19, 2014

Posts by sam


Total # Posts: 4,122

Geometry/Trigonometry
Circles with centers (2,1) and (8,9) have radii 1 and 9, respectively. The equation of a common external tangent to the circles can be written in the form y=mx+b with m < 0. What is b? I drew the diagram and the tangents but to no avail. I cannot seem to find the points ...
December 4, 2013

MATHS
d + d+k + d+2k + d+3k + d+4k = 5d + 10k 4h term is d+3k = 9 5d + 10k = 85 5d + 15k = 45 -5k = 40 k = -5 and d = 9 + 15 = 24
December 4, 2013

algebra
difference is 12 dollars per month so for them to be the same the 0.15 needs to catch up to 0.25 by 12 dollars 12 / 0.25-0.15 = 12 / 0.1 = 120 minutes
December 3, 2013

Trigonometry/Geometry
Oh thank you very much sir!!
December 3, 2013

Trigonometry/Geometry
Rhombus ABCD, with side length 6, is rolled to form a cylinder of volume 6 by taping AB to DC. What is sin(angle ABC)? I don't know how to begin. Help?
December 3, 2013

physics
A dock worker loading crates on a ship finds that a 29 kg crate, initially at rest on a horizontal surface, requires a 90 N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 60 N is required to keep it moving with a ...
December 3, 2013

physics
A dock worker loading crates on a ship finds that a 29 kg crate, initially at rest on a horizontal surface, requires a 90 N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 60 N is required to keep it moving with a ...
December 3, 2013

math
Thank you
December 3, 2013

math
Thats what i thought, the question said logical reasoning
December 3, 2013

math
Two sides of an isosceles triangle are 13 inches and 16 inches. What are two possible perimeters ? IS one 42 ?
December 3, 2013

math
Thank you. Ms. Sue
December 3, 2013

math
3 identical tables are 3 1/2 ft wide and 5 1/4 long. To make one long table, they are pushed together to share thrir short ends. What is the perimeter of the long table ?
December 3, 2013

math
3.865. Thank you. Didnt know about / 1000
December 2, 2013

math
A group of hikers walk to a lake near the park. They hike 2,408 meters to the lake. They take a shortcut back to the park that is 1,457 meters long. How many kilometers is their hike ?
December 2, 2013

Geometry
You use a copy machine to enlarge an 8” 11” document, and you choose the 136 % enlargement setting. What will be the dimensions of the enlarged document? Round to the nearest hundredth of an inch.
November 29, 2013

german
So, yeah, everyone here is correct. It would be placed at the end of the sentence. so it would be like "Wir (subject) wollen (modal) Brot (other stuff) essen (other verb)" Probably not the best example, but things follow that format.
November 27, 2013

Science
When calculating the distance to extremely distant stars using parallax, astronomers use incredibly accurate instruments. Why is this important? Please help Thank you
November 25, 2013

Science
When using the method to calculate the distance to stars, astronomers measure the parallax angels exactly 6 months apart. Why? Please help!
November 25, 2013

Physics
James joule measures temperature of the water at the top and bottom of the waterfalls. If one of these waterfalls is 55m high, and all gravitation energy of the water is at the top of the falls. What temperature difference would be between the water at the top and bottom? (...
November 25, 2013

Physics
James joule measures temperature of the water at the top and bottom of the waterfalls. If one of these waterfalls is 55m high, and all gravitation energy of the water is at the top of the falls. What temperature difference would be between the water at the top and bottom? (...
November 25, 2013

Math-Algebra
What have you done so far?
November 24, 2013

Trig-Geometry - Law of sines and cosines
Hello everyone, I've been struggling on this problem for quite some time. It would be appreciated if you could help. Thanks. (The website is the diagram, it is a screenshot) In the diagram below, triangle ABC has been reflected over its median AM to produce triangle AB'...
November 24, 2013

math
13/43 * 30/43* 30/43 Unless I am wrong. This may be more complicated than I think.
November 24, 2013

biology
D acetyl coa or coenzyme A
November 24, 2013

biology
At the end of the electron transport chain when electrons & H+ & O2 combine. Oxygen is the final electron acceptor.
November 24, 2013

Admin?
Hi do you know who the admins are or the moderators? thanks
November 21, 2013

Law
You probably want a new Vehicle identification number to prevent authorities from trakcing you down, so probably A, or maybe B. definitely not C or D ;)
November 21, 2013

Math
np
November 21, 2013

Math
23/100 23% 0.03 3% 0.325 32.5% 1/4 25% 0.6 60% 0.75 3/4 12.5% 0.125 100% 1.00 1/1
November 21, 2013

Math
Sorta confused about the question, what do you mean?
November 21, 2013

math
1, 1, 5, 5 2, 2, 4, 4 3, 3, 3, 3
November 21, 2013

maths
What do you mean by the underscore?
November 21, 2013

Trigonometry/Geometry - Law of sines and cosines
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 21, 2013

math
Nice, good job.
November 21, 2013

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

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