Wednesday

April 23, 2014

April 23, 2014

Post a New Question | Current Questions

**chemistry 1st year**

A 5 liter vessel contains 2g of hydrogen and 28g of nitrogen at 27 temperature.find to total mixture ?
*Monday, July 1, 2013 at 5:04pm*

**Accounting**

Zeke Company is a manufacturing company that has worked on several production jobs during the 1st quarter of the year. Below is a list of all the jobs for the quarter: Balance Job 356 $ 450 Job 357 $1,235 Job 358 $ 378 Job 359 $ 689 Job 360 $ 456 Job 356, 357, 358 & 359 were ...
*Saturday, June 22, 2013 at 11:54pm*

**Physics**

U must connect 'total internal reflection to occur' with the place it takes place which is described in the 1st paragraph in order not to misunderstand the problem. The solution is really easy to find then.
*Thursday, June 20, 2013 at 10:53am*

**physics**

1/2 (.58) t^2 + 1/2 (.50) t^2 = 33 t = 7.8 sec 1st player runs 17.72 m
*Monday, June 17, 2013 at 10:57am*

**algebra**

if the length y is a function of the mass, x, then y = ax+b 2a+b = 12 5a+b = 18 subtract 1st from 2nd to get 3a = 6 a = 2 2*2+b=12, so b=8 y = 2x+8
*Sunday, June 16, 2013 at 3:10pm*

**conditional sentence**

1. If the sound system hadn't failed, last night's show would have been better. a. this is a correct sentence using the 2nd conditional form b. this is a sentence using the 3rd conditional form Answer a. 3. if the club's manager agrees, they'll play a few more ...
*Wednesday, June 12, 2013 at 2:34pm*

**trig**

angular velocity: 1st wheel : 2π rad/30 sec = π/15 rad/sec 2nd wheel : 2π radians/15 sec = 2π/15 rad/sec linear velocity 1st wheel: circumference = 2π(20) = 40π ft linear velocity = 40π/30 ft/sec = 4π/3 ft/se 2nd wheel: circumf = 20π...
*Tuesday, June 11, 2013 at 6:42pm*

**Statistics**

the 1st class in a relative frequency table of 50-59 an the corresponding relative frequency is 0.2. What does the 0.2 value indicate
*Monday, June 10, 2013 at 5:43pm*

**tenses**

The subject (muffins) is certainly plural, but it's not first person. 1st: I,we 2nd: you 3rd, he,she,it,they Given that, what does it have to do with tenses?
*Monday, June 10, 2013 at 12:19pm*

**English Pls Ms. Sue help me by checking my work**

Please replace the incorrect words with correct words in the following sentences using AP Style. There may be more than one error per sentence; all sentences contain at least one error. Use correct AP style, punctuation, grammar and spelling errors.) 11. Original: More than ...
*Monday, June 10, 2013 at 6:36am*

**algerbra**

What is the median and the 1st or lower quartile of the following data: 4, 12, 15, 20, 24, 30, 32, 35
*Thursday, June 6, 2013 at 9:57am*

**math**

in a geometric sequence the first term is 2. The 3rd term is the sum of the 1st and 2nd term. Find the ratio, and the 2 terms
*Monday, June 3, 2013 at 9:12pm*

**algebra**

The 2nd equation is the 1st equation multiplied by -3. So, they are the same line, and there are infinitely many solutions.
*Thursday, May 30, 2013 at 11:03am*

**Business Management**

I can compare with you for the 1st exam on lesson 1 foundations, is this correct?
*Sunday, May 19, 2013 at 7:34am*

**MATH HELP!!**

How many ways can 12 horses in a race come in 1st, 2nd, and 3rd place
*Friday, May 17, 2013 at 8:54pm*

**Algebra 2**

Nope. (0,0) does not work in the 1st. 0 - 36 ≠ 36 Can't believe I let you fool me! :-)
*Friday, May 17, 2013 at 10:55am*

**Physics**

@ FLU :- Q8 1st part, I tried everythin but didnt get green tick, mine alpha angle is 70 degree and n=1.5 Also what is Q3 part b answer ???
*Wednesday, May 15, 2013 at 8:14am*

**Physics**

1st prob- c) 1.451e8 and 1.6711e8 d) 1.936e8 and 2.229e8 If you want answers of any other probs or formulas, please let me know
*Sunday, May 12, 2013 at 11:36pm*

**Math (Algebra)**

An elevator named L in "63 Building" in Seoul is notorious for its low speed. It takes 3 seconds for L just to move one floor. It takes another 20 seconds for it to have its door open and close automatically. What is even more frustrating, is that the elevator ...
*Saturday, May 11, 2013 at 4:16am*

**math**

first one times 6 6x + 6y = -12 4x - 6y = -3 add them 10x = -15 x = -15/10 = -3/2 sub into the 1st -3/2 + y = -2 y = 3/2 - 2 = -1/2 x = -3/2 , y = -1/2
*Thursday, May 9, 2013 at 9:15am*

**Calculus**

I can only think they mean the average velocity during the 1st 3 seconds. So, get the displacement and divide by the time for average velocity over the interval.
*Wednesday, May 8, 2013 at 4:37pm*

**Probability Math**

A committee of four students will be selected from a list that contains six Grade 9 students and eight Grade 10 students. What is the expected number of Grade 10 students on the committee?
*Tuesday, May 7, 2013 at 9:29pm*

**Math**

An elevator named L in "63 Building" in Seoul is notorious for its low speed. It takes 3 seconds for L just to move one floor. It takes another 20 seconds for it to have its door open and close automatically. What is even more frustrating, is that the elevator ...
*Tuesday, May 7, 2013 at 1:46am*

**physics**

Given data: 1st rod: L₁, T₁, x₁, a => A₁=a²; 2nd rod: L₂, T₂, x₂, d => A₂= πd²/4; Hook’s Law for rods: σ=Eε T/A = E•x/L, 1st rod: T₁/a²= E•x₁/L₁, 2nd rod: 4T&#...
*Sunday, April 28, 2013 at 2:01pm*

**Algebra**

Which of the following graphs of exponential functions corresponds to a geometric sequence with a 1st term of 6 and a ratio of 1/2? I'm honestly so confused on this. :(
*Friday, April 26, 2013 at 10:48am*

**algebra**

rate of 1st person = 25/4 ft^2/h rate of 2nd person = 25/5 ft^2/h combined rate = (25/4+25/5) or 45/4 ft^2/h so area in 8 hrs = 8(45/4) ft^2 = 90 ft^2 or 1st person can do 25 fT2 in 4 hrs, so he can do 50 ft^2 in 8 hrs 2nd person does 25/5 or 5 ft^2 in 1 hour , so in 8 hours ...
*Thursday, April 25, 2013 at 7:51am*

**?**

Let me see if I understand how to find your grade now. So this time if there are 60 questions and you miss 15 your grade would be a 72?
*Tuesday, April 23, 2013 at 8:21pm*

**?**

If there's 60 questions on a homework paper and you miss 10 what would your grade be? I forgot how to find out your grade.
*Tuesday, April 23, 2013 at 7:17pm*

**Algebra**

See Related Questions:Fri,8-20-10,6:17pm Your 1st term should be 3x^2.
*Wednesday, April 17, 2013 at 9:11pm*

**programming**

Here's a little perl program that handles the job: sub Ceil { my $x = shift; int($x+.9999); } print "Numeric grades for midterm and final: "; my ($m,$f) = split /[,\s]/,<STDIN>; $avg = Ceil(($m+2*$f)/3); $grade = qw(F F F F F F D C B A A)[int($avg/10)]; ...
*Wednesday, April 17, 2013 at 11:41am*

**Geometry **

The grade of a road or a railway road bed is the ratio rise/run, usually expressed as a percent. For example, a railway with a grade of 5% rises 5 ft for every 100 ft of horizontal distance. 1. The Johnstown, Pennsylvania, inclined railway was built as a "lifesaver" ...
*Monday, April 15, 2013 at 5:23pm*

**english**

dialect is used to a-stablish setting and character b-describe the atmosphere c-support the main idea d-help readers visualizwe events mi 1st answer is d then a
*Sunday, April 14, 2013 at 9:27pm*

**physics**

Please ignore my 1st response. My computer malfunctioned. I will have to repeat the entire process.
*Sunday, April 14, 2013 at 3:35pm*

**Algebra(1st one was typo)**

so is this one, try doing it the way I did it in your original post
*Thursday, April 11, 2013 at 7:46pm*

**8th grade**

10th grade
*Tuesday, April 9, 2013 at 1:57pm*

**LBCC**

an apartment building has the following apartments: 2 bdrm 3 bdrm 4 bdrm 1st floor
*Sunday, April 7, 2013 at 11:08pm*

**Discrete Math**

Assuming the trophies are identical, or must be awarded in order 1st-to-last, then we just need to count the ways of choosing 8 people from 30. C(30,8) = 5,852,925
*Thursday, April 4, 2013 at 1:40pm*

**math**

1st times 2 8u + 6v = -2 2nd by 3 9u + 6v= 3 subtract them u = 5
*Tuesday, April 2, 2013 at 8:34pm*

**Algebra**

Find the 1st four hexagonal numbers and the formula The difference of two squares a2 - b 2 can be found in 16sq2 – 13sq2 = 3(16 + 13) = 3 . 29 = 87
*Monday, April 1, 2013 at 10:56pm*

**math**

An elementary school collected a total of 240 cans during a food drive. Grade 3 students collected 1/3 of all the cans grade 4 students collected 52 cans, and the rest of the cans were collected by grade 5 students. How many cans did grade 5 collect? A.28 B.80 C.108 D.188
*Friday, March 29, 2013 at 11:34pm*

**5th grade math**

how do i convert milligrams to grams- i am in fifth grade-easiest way please.
*Thursday, March 28, 2013 at 9:25am*

**English**

I agree with your 2nd and 3rd answers. I have no idea about the 1st one, though.
*Wednesday, March 27, 2013 at 8:18am*

**chemistry**

Ya. i got 1st 1. Rb=82.0/55.79*1*10^-6= 1.47*10^6
*Monday, March 25, 2013 at 12:41am*

**English**

Why should grade 8 students have to do volunteer hours to graduate grade 8? Please provide me with atleast 6 points and so I can expand on it. Your help is very much appreciated!:)
*Saturday, March 23, 2013 at 5:38pm*

**English**

What were your teacher's directions? To write a diamante of synonyms (1st and last nouns mean similar things)? Or to write a diamante of antonyms (1st and last nouns mean opposites)? When I assigned these, I had students do antonym diamantes, not synonym, but you must do ...
*Wednesday, March 20, 2013 at 6:58pm*

**Algebra**

1st one: looks like they are adding 5 , so arithmetic C is correct 2nd: terms would be 15 16.5 18 19.5 ... You are correct again with B
*Tuesday, March 19, 2013 at 11:43am*

**Algebra 1**

divide the 2nd by -2 to get 10x + 3y = 4 which is the same as the 1st equation, so there is an infinite number of solutions (You are basically given twice the same line)
*Sunday, March 10, 2013 at 12:16pm*

**ALL subjects..**

Hi!! Well,I'm in tenth grade And I was wondering if there are any practice test websites for the 10th grade Test.. I believe Pct? Please!! Help..
*Friday, March 8, 2013 at 8:22am*

**help**

can someone help me with the pythagorean theorem? VERY HARD IM IN 7TH GRADE AND THIS IS SOME 7TH GRADE MATH HOMEWORK THAT I NEED HELP WITH!!!!!!!!!!!
*Thursday, March 7, 2013 at 5:26pm*

**math**

let the time driven by 1st bike be t hrs then the time driven by 2nd bike is t-1 hrs distance covered by 1st bike = 47t miles distance covered by 2nd bike = 54(t-1) 47t + 54(t-1) = 52 47t + 54t - 54 = 52 101t = 106 t = 106/101 hrs or appr 1 hr and 3 minutes
*Tuesday, March 5, 2013 at 3:09pm*

**Physics**

If you walk 2 km from your house to a store then back home, whats your displacement? (Displacement is the difference between 1st position and final position)
*Monday, March 4, 2013 at 12:20pm*

**Urgent**

draw an angle x in the 1st quadrant with sinx=3/5, and an angle y in the 2nd quadrant with cosy=-12/13, then determine the exact value of tan(x+y).
*Friday, March 1, 2013 at 12:46pm*

**physics**

1st, find the radius of the orbit of the moon. 2nd, then divide 34,200 from the result.
*Tuesday, February 26, 2013 at 4:26am*

**Algebra 1**

Even numbers have a differnce of two. 2, 6, and 8 are consecutive even numbers. Let n = 1st Let n + 2 = 2nd Let n + 4 = 3rd 3(n) - 2(2n+2) = 1/3(n+4) Here is the equation. Can you solve it?
*Friday, February 22, 2013 at 5:14pm*

**Physics**

THE #1ST (1+sqrt(2))/sqrt(6)
*Friday, February 22, 2013 at 5:52am*

**algebra**

Assuming that we can't start with 0 , or else it would be a 2 - digit number, there are 9 choices for the 1st, then only 1 at the end the middle can be any of the 10 number of such numbers = 9 x 10 x 1 = 90
*Wednesday, February 20, 2013 at 10:22am*

**PHYSICS**

I've corrected my mistake in the 1st equation V(x) = - v•cos α +u•cosβ = - 190cos25 + 45cos15=-172.2+43.5= -128.7 km/h, V(y)= v•sinα+u•sinβ= 190sin25 + 45sin15= 80.3 + 11.6 = 91.9 km/h, V=sqrt{V(x)²+V(y)²}= 158.1 km/h I ...
*Monday, February 18, 2013 at 5:01pm*

**maths**

so, make the suggested substitution: p - 5q = 1/q 2p + q = s I think there's a typo in the 1st equation. Don't expect to see a quadratic.
*Tuesday, February 12, 2013 at 4:58pm*

**Math**

A rather lengthy question, let's find the intersection points. 1st and 2nd line: 3x+2y=1 3x+2(x-2) = 1 5x = 5 x=1 , then y = 1-2 = -1 ----> point A(1,-1) 2nd and 3rd: 4x - 9y = -22 4x - 9(x-2) = -22 -5x = -40 x = 8 , then y = 2-8 = -6 ----> point B(5,-6) 1st and 3rd...
*Tuesday, February 12, 2013 at 12:14pm*

**math**

1st Multiply 2/3 x 5/6 = 5/9. Then Multiply 5/9 x 14 = 7 7/9. SO THE ANSWER IS 7 7/9.
*Monday, February 11, 2013 at 4:00pm*

**geometry**

Clearly the 1st and 3rd letter must be the same, but the middle can be any of the 7 letters number of ways = 7 x 7 x 1 = 49
*Monday, February 11, 2013 at 10:51am*

**physics**

A rock is dropped from a treetop 19.6 m high, and then, 1.00 s later, a second rock is thrown down. With what initial velocity must the second rock be thrown if it is to reach the ground at the same time as the first? I'm not sure how to find the initial velocity of the ...
*Sunday, February 10, 2013 at 7:00pm*

**math**

1st bounce=0.2(4/5)=0.16m 2nd bounce=0.16(4/5)=0.128m or 128cm
*Sunday, February 10, 2013 at 1:14am*

**Math**

slope of 1st line is (7-1)/(5-a) = 6/(5-a) slope of 2nd line is (1-8)/(a+2-8) = -7/(a-6) If the lines are parallel, the slopes are equal, so 6/(5-a) = -7/(a-6) 6(a-6) = -7(5-a) 6a-36 = 7a-35 -a = 1 a = -1
*Wednesday, February 6, 2013 at 12:41pm*

**algebra**

what steps? They gave you a relation. Take the set of the 1st element of each pair. If you don't know how to find the domain/range of a relation when they give you each element and its image, you are deep in it.
*Monday, February 4, 2013 at 2:32pm*

**physics**

sorry wrong post: Given: mass= 4.10 kg k= 210 N/m x= 2.60x10^2 m just substitute to W=1/2kx^2 and you'll get the answer for the 1st question sorry again
*Sunday, February 3, 2013 at 4:25pm*

**physics**

0.0625J is the answer for the 1st question W=1/2kx^2 =1/2(200 N/m)(0.025)^2 =0.0625J
*Sunday, February 3, 2013 at 4:13pm*

**mechanics**

The First Stone. d1 = 0.5g*t^2 = 4.9*(1.5)^2 = 11 m. = Distance traveled by 1st stone after 1,5 s. V^2 = Vo^2 + 2g*d. V^2 = 0 + 19.6*11 = 215.6 V = 14.68 m/s = Velocity of 1st stone after 1.5 s. d1 = Vo*t + 0.5g*t^2 = 200-11. 16.68t + 4.9t^2 = 189 4.9t^2 + 16.68t - 189 = 0. ...
*Friday, February 1, 2013 at 5:27pm*

**Algebra**

I'm in 8th grade and this is a 9th grade class. I was just wondering because she gave it to us without going over it slowly...
*Thursday, January 31, 2013 at 9:56pm*

**MATH**

In Marissa's Calculus course, attendance counts for 5% of the grade, quizzes count for 15% of the grade, exams count for 60% of the grade, and the final exam counts for 20% of the grade. Marissa had 100% average for attendance, 93% for quizzes, 82% for exams, and 81% on ...
*Sunday, January 27, 2013 at 8:27pm*

**math**

a boat travels at 16 knots 1st leg: 6hr @ S63W 2nd leg: 4hr @ N10E find time and bearing back to port
*Wednesday, January 23, 2013 at 11:44am*

**money conversion problem**

I have a currency conversion problem that I have found difficult to solve. Suppose that a currency speculator believes that as time goes on the exchange rate is going to fall. On November 1st the speculator converts $1,000 US into Canadian dollars (just call the converted ...
*Tuesday, January 22, 2013 at 3:01pm*

**Analytic Geometry**

Give the equation of the circle tangent to both axes of radius 5 and in the 1st quadrant. Can you help me solve this?
*Monday, January 21, 2013 at 5:31pm*

**math**

The 6th term of an arithmetic sequence is x while the 11th is y find the 1st 2 terms
*Sunday, January 20, 2013 at 9:04am*

**6th grade s.s forgot textbook in locker!!!!**

You'll be better off taking a late grade than cheating. You could look each of these up on Google.
*Wednesday, January 16, 2013 at 6:53pm*

**2nd Grade Math**

I'm in 6th grade, the answer is, 10. :)
*Monday, January 14, 2013 at 7:40pm*

**8th grade math**

I dont get this but this isint 8th grade math its 7th grade
*Thursday, January 10, 2013 at 2:27pm*

**8th grade math**

im in 5th grade and i no round up so 7
*Wednesday, January 9, 2013 at 5:50pm*

**Govt school math**

subtract the first from the second ... 2x+y = 27 x + y = 18 ----------- x = 9 sub into the 1st: 9+y = 18 y = 9 so x=9 and y=9
*Wednesday, January 9, 2013 at 9:05am*

**Govt school math**

Solve the question by substitution method? Equation 1st x+y=18 equation 2nd 2x+y=27
*Wednesday, January 9, 2013 at 6:21am*

**math**

What do want done ? I can "solve" #2 : sub the first into the 2nd ... 3(y-2) - y = 6 3y - 6 - y = 6 2y = 12 y = 6 then x = y-2 = 6-2 = 4 for the 1st and 3rd, I have no clue what the xt1 and 2xt3 are supposed to be. Is the t a new variable? is it t^3 ?
*Tuesday, January 8, 2013 at 7:58pm*

**math**

but Ms. Sue im in grade 11 and in grade 10 in science I did frog disection
*Sunday, January 6, 2013 at 2:25pm*

**math**

how would i find the sum of the 7 term. if i have 1st term = 11 and 7th term = 704.its a geometric series. i dont know how to find the difference?
*Wednesday, January 2, 2013 at 7:05pm*

**math**

you cannot have the "sum of the 20th term". If you mean the sum of the 1st 20 terms, then T10 = a+9d=34 S20 = 10(2a+19d) = 710 so, a=7, d=3 T25 = 7+24*3 = 79
*Wednesday, January 2, 2013 at 5:07am*

**maths geometry**

1st --- x 2nd --- x+2 3rd ---- x+4 solve for x: x + x+2 + x+4 = 153
*Thursday, December 27, 2012 at 10:38am*

**5th grade**

im in fifth grade to
*Wednesday, December 19, 2012 at 10:13pm*

**math**

if 40 percent of my grade is at a 97 percent average and 40 percent of my grade is at a 92 percent average and my final test is worth 20 percent of the grade then what do i have to score on my final test to have a grade of 91.5 percent or better?
*Tuesday, December 18, 2012 at 10:21pm*

**math**

You offer to do the dishes for your family for the next month.This month has only 31 days. You suggest that they can pay you in one of three ways: A. $0.50 each day.(I already did this;=$15.50 a month. B.$0.10 the first day,$0.20 the second day,$0.30 the third day,and so on. C...
*Monday, December 17, 2012 at 6:32pm*

**Math ave grade**

Let her grade on the final be x .5x + .1(92) + .4(76+82+83)/3 = 87.5 solve for x (I get 92.3)
*Monday, December 17, 2012 at 8:35am*

**Math ave grade**

a student scores 76,82,83 on the first three test, she has a 92 homework averge. if the final exam is 50% of grade and homework is 10% and the test average (nit including the final) is 40% then what grade should she get on the final exam to get a 87.5 in the class?
*Sunday, December 16, 2012 at 11:59pm*

**calculus ..>steve**

y = 2/3 x^3 + 5/2 x^2 - 3x y' = 2x^2 + 5x - 3 y'' = 4x + 5 inflection where y''=0 -- at x=-5/4 intercepts at (0,0) and at x = 3/8 (-5±√57) Looks like you need to review the meanings of 1st and second derivatives.
*Saturday, December 15, 2012 at 12:49pm*

**5th grade math (word problems)**

I didn't see an answer from yesterday, so resending. Also, is there a website to explain how to solve word problems - like key phrases to look for (ex: 'in all' - add; 'what's left' - subtraction)? Here's question from yesterday: sorry,but I don'...
*Wednesday, December 12, 2012 at 7:01am*

**5th grade math (word problems)**

sorry,but I don't understand word problems - like what formula/expression to use. Here's the 1st problem: Rob practiced 3/5 of his music in 25minutes. About how long does it take to practice all of his music? I know that Rob has 2/5 left of music to practice. So, do I ...
*Tuesday, December 11, 2012 at 4:22pm*

**Math**

The chart shows the results of 40 students in 1st period classrooms who met the standard on the 6th grade math assessment Peacock 15 Salas 12 Tiegs 13 If these numbers were the same for the remaining periods and if 200 students tested how many students from Ms. Salas's ...
*Monday, December 10, 2012 at 7:42pm*

**Physics**

The alcohol in the first arm floats on top of the denser glycerin and pressures it down distance h from the initial level. As a result, the glycerin rises by the distance h in the second arm. Due to the equilibrium condition, the point of the two liquids contact in the 1st arm...
*Saturday, December 8, 2012 at 5:13am*

**Business Math**

P1 = Po(1+r)^n. P1 = Principal after 1st 3 years. Po1 = $15,000 = Initial deposit @ beginning of the 1st 3 years. r = (9%/2)/100% = 0.045 = Semi-annual % rate expressed as a decimal. n = 2Comp/yr * 3yrs = 6 Compounding periods. Solve the given Eq and get: P1 = $19,533.90. P2...
*Friday, December 7, 2012 at 7:18pm*

**7th grade math Ms. Sue please**

Yeah I think it is. You are in connections? You are in 7th grade? I am.
*Thursday, December 6, 2012 at 1:11pm*

**Phyiscs**

The height of the first stone is h₀=v₀²/2g=27²/249;9.8 = 37.2 m. v=v₀-gt, v=0 => the time of the upward motion is t= v₀/g =27/9.8=2.8 s. The 1st stone was falling down during t₁=5.5-2.8 = 2.7 s, when the 2nd stone started. ...
*Wednesday, December 5, 2012 at 3:28pm*

**math 6th grade**

Equation of a line that divides the first and third quadrants in half Being 6 th grade it could be the beginning of function If x = 1 , then y = 1 If x= 2 , then y = 2
*Tuesday, December 4, 2012 at 11:56pm*

**Algebra**

adult ticket --- $x child ticke ---- $y 3x + 2y = 80.88 2x + 3y = 76.47 1st times 3 ---> 9x + 6y = 242.64 2nd times 2 --> 4x + 6y = 152.94 subtract them: 5x = 89.7 x = 17.94 in 1st 3(17.94) + 2y = 80.88 2y = 27.06 y = 13.53 adult ticket is $17.94 child's ticket is 13...
*Sunday, December 2, 2012 at 9:50pm*

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