Monday

April 21, 2014

April 21, 2014

Post a New Question | Current Questions

**math (Matrix algebra)**

solve the equations by using a) the adjoint matrix b) elementary row operations i) x+y+z=6 2x-y+z=3 x+4y-z=6 ii) 3p-3q+r=1 -3p+5q-2r=-1 p-2q+r=3 iii)-12a+b+17c=-14 2a-b+3c=5 8a+b-13c=-3 thanks sir/madam
*Wednesday, April 16, 2014 at 4:10am*

**math (Matrix algebra)**

solve the equations by using a) the adjoint matrix b) elementary row operations i) x+y+z=6 2x-y+z=3 x+4y-z=6 ii) 3p-3q+r=1 -3p+5q-2r=-1 p-2q+r=3 iii)-12a+b+17c=-14 2a-b+3c=5 8a+b-13c=-3 thanks sir/madam
*Wednesday, April 16, 2014 at 3:42am*

**math (Matrix)**

solve the equations by using a) the adjoint matrix b) elementary row operations i) x+y+z=6 2x-y+z=3 x+4y-z=6 ii) 3p-3q+r=1 -3p+5q-2r=-1 p-2q+r=3 iii)-12a+b+17c=-14 2a-b+3c=5 8a+b-13c=-3 thanks sir/madam
*Tuesday, April 15, 2014 at 10:20pm*

**Elementary Algebra**

28 + .22m = 29 + .17m Solve for m.
*Tuesday, April 15, 2014 at 1:53pm*

**maths (matrix)**

solve the equations by using a) the adjoint matrix b) elementary row operations i) x+y+z=6 2x-y+z=3 x+4y-z=6 ii) 3p-3q+r=1 -3p+5q-2r=-1 p-2q+r=3 iii)-12a+b+17c=-14 2a-b+3c=5 8a+b-13c=-3 thanks sir/madam
*Tuesday, April 15, 2014 at 1:46pm*

**Elementary Algebra**

"The university of Oklahoma maintains a fleet of vehicles to rent to university departments. To transport equipment, the School of Drama needs to rent either a cargo can or a pickup truck for one day. The cargo van costs $28 for a day, plus $0.22 per mile. The pickup ...
*Tuesday, April 15, 2014 at 12:58pm*

**math (Matrix)**

solve the equations by using a) the adjoint matrix b) elementary row operations i) x+y+z=6 2x-y+z=3 x+4y-z=6 ii) 3p-3q+r=1 -3p+5q-2r=-1 p-2q+r=3 iii)-12a+b+17c=-14 2a-b+3c=5 8a+b-13c=-3 thanks sir/madam
*Tuesday, April 15, 2014 at 6:02am*

**Calculus Help Please Urgent!!!**

find the limit algebraically. Use L'Hospital's Rule where appropriate. If there is a moare elementary method, consider using it. If L'Hospital's Rule doesn't apply, explain why lim -> 0 (cot(x)-(1/x)) show work please!!!
*Sunday, April 13, 2014 at 10:39pm*

**Elementary Statistics**

There are 100 questions from an SAT test, and they are all multiple choice with possible answers of a,b,c,d,e. For each question, only one answer is correct, find the standard deviation for the numbers of correct answers for those who make random guesses for all 100 questions.
*Friday, April 11, 2014 at 3:22pm*

**algebra 2**

The famous mathematician Gauss, while he was in elementary school, notices the following 1+2+3+..+58+59+60 = (1+60) + (2+59) + (3+58) +.. (for a total of 30 of these pairs) = 30(61) = 1830
*Sunday, April 6, 2014 at 8:05pm*

**Math**

In Mrs. Julie's classroom the ratio of boys to girls is 12 to 8. If the entire elementary school has a population of 400 students, how many would you expect to be girls?
*Sunday, March 30, 2014 at 7:30pm*

**MATH**

there are 400 students at smith Elementary school 1/4 of the students are in fourth and fifth grade, 1/10 of the students are in grade 3, 2/8 are in second grade and 2/5 are in first grade . How many kids are in each grade? (4th and 5th have an equal amount)
*Monday, March 24, 2014 at 3:14pm*

**Physics**

An ice puck of mass m revolves on an icy surface in a circle at speed v at the end of a horizontal string of length L. The tension in the string is T Write the equation for centripetal force, and substitute the values T and L appropriately. Then with a bit of elementary ...
*Thursday, March 20, 2014 at 2:32pm*

**elementary**

Building A has 24 and B has 36. EASY DUDE chagol
*Tuesday, March 18, 2014 at 6:35am*

**Algebra **

1) There are two pet stores in zacharys town. There are dogs, cats, and hamsters at the first pet store. The second store has dogs, rabbits, and fish. Write a set that represents all of the different pets stores in the town. 2) of the 125 students in an elementary school, 89 ...
*Saturday, March 15, 2014 at 11:27pm*

**Algebra **

1) There are two pet stores in zacharys town. There are dogs, cats, and hamsters at the first pet store. The second store has dogs, rabbits, and fish. Write a set that represents all of the different pets stores in the town. 2) of the 125 students in an elementary school, 89 ...
*Friday, March 14, 2014 at 12:33pm*

**Algebra **

1) If N is the set of natural numbers that are factors of 18, represent this set in roster form. 2) Suppose U={1,2,3,4,5,6,7,8,9,10} is the universal set and A={1,4,5,9,10} What is A? 3) The wrestling team is holding a car wash. The teams goal is to raise at lease 252 and each...
*Friday, March 14, 2014 at 1:16am*

**Algebra **

1) There are two pet stores in zacharys town. There are dogs, cats, and hamsters at the first pet store. The second store has dogs, rabbits, and fish. Write a set that represents all of the different pets stores in the town. 2) of the 125 students in an elementary school, 89 ...
*Thursday, March 13, 2014 at 10:21pm*

**Elementary Statistics**

5*4*3= 60
*Monday, March 10, 2014 at 7:05pm*

**Math Geometry **

Marisol is painting on a piece of canvas that has an area of 180 square inches. The length of the Painting is 1 1/4 times the width. What are the dimensions of the painting this is for elementary school so make it simple
*Friday, March 7, 2014 at 5:06pm*

**AED **

Read the following scenario: You are a second-grade teacher at Happy Valley Elementary School. You are teaching language arts and social studies. Your classroom of 21 students consists of 7 white students, 5 Latino students, 4 African American students, 3 Native American ...
*Thursday, February 27, 2014 at 1:04pm*

**Hiram Elementary School**

I don't believe this is a complete question
*Tuesday, February 25, 2014 at 5:09pm*

**Hiram Elementary School**

Maniac Magee
*Tuesday, February 25, 2014 at 5:06pm*

**calculus**

a = ∫[0,1] 2π y ds where ds = √(1+(y')^2) a = 2π∫[0,1] (x^3+3)√(1+9x^4) dx The ∫(x^3)√(1+9x^4) dx part is easy, but the ∫3√(1+9x^4) dx cannot be done with elementary functions.
*Thursday, February 20, 2014 at 12:10am*

**Thesis statement**

The subject of this paper is my experience with teaching elementary school children” Is this a weak or strong thesis statement how can you make it stronger or improve it? what makes it weak?
*Tuesday, February 18, 2014 at 12:15am*

**Thesis Statement**

“The subject of this paper is my experience with teaching elementary school children” Is this a weak or strong thesis statement
*Monday, February 17, 2014 at 11:32pm*

**Math**

The 80 students in the 5th grade at north side elementary school voted for their favorite animal after a trip to the zoo.the elephant received 3/5 of the votes.how many votes did the elephant receive.
*Wednesday, February 5, 2014 at 8:26pm*

**math**

Are you preparing for a test or exam? The question that you have asked and I have answered for you are of an elementary nature in this topic. I have a feeling that you have some major studying to do.
*Sunday, February 2, 2014 at 1:41pm*

**Statistics**

WEB CALCULATOR EXERCISE Descriptive Statistics 1 The table below presents data for a sample of people who completed a religious survey. Age Gender Denomination Church Attendance 56 1 7 4 46 2 6 5 49 2 6 5 49 1 1 5 27 2 9 5 51 1 4 2 47 2 2 3 67 1 5 4 49 2 2 6 33 1 12 6 55 2 9 5...
*Tuesday, January 28, 2014 at 8:56pm*

**Physic II -----UD**

This question essentially comes down to how many Coulombs of charge 50 electrons have (i.e., the sphere, the initial charge, etc., are irrelevant). So, knowing that one elementary charge is e = 1.6×10^-19 C and that 50 electrons will have a total charge of -50e, -50e &...
*Saturday, January 25, 2014 at 8:37pm*

**Columbia College**

This question essentially comes down to how many Coulombs of charge 50 electrons have (i.e., the sphere, the initial charge, etc., are irrelevant). So, knowing that one elementary charge is e = 1.6×10^-19 C and that 50 electrons will have a total charge of -50e, -50e &...
*Saturday, January 25, 2014 at 7:16pm*

**intro to computers**

what type of device is characteristic of an enterprise environment? a workstation used by a retired person. a workstation used at an engineering firm. a tablet computer used by an elementary school student a notebook used by a college student
*Tuesday, January 21, 2014 at 6:33pm*

**Grammatical errors?**

Dear Prospective Host Teacher and Principal: Thank you for allowing me to be a part of your learning community. I am quite jubilant to have my first PPIE experience with you. Education has interested me for a large portion of my life and I often find myself volunteering with ...
*Friday, January 17, 2014 at 11:16pm*

**English**

Based on the words in parentheses, which one of the following sentences needs a past participle? A. We have (eat) late every night. B. (Look) out for snakes, we moved through the swamp. C. Last night, parents (gather) at the elementary school. D. They just (finish) breakfast ...
*Thursday, January 16, 2014 at 3:01pm*

**Math: Differential Equations**

dy/y = x secx dx I don't think x secx can be done in elementary functions
*Thursday, January 16, 2014 at 12:28am*

**Literature Essay (Writeacher and/or Ms.Sue)**

What are your opinions? Have I written according to the topic I was give? "Write an essay explaining in what ways people today are more fearful than people in past generations. You may use examples from real life, the selection you just read, books, movies, or television ...
*Sunday, January 12, 2014 at 9:25pm*

**Literature Essay (Writeacher)**

I. People are more fearful of violence as it has intensified. A. Shootings 1. As a result of the Batman Massacre, midnight premieres no longer exists, which is ultimately an act of fear. 2. More schools are being armed with armed security guards after the Sandy Brooke ...
*Saturday, January 11, 2014 at 8:29pm*

**Spanish Foreign Language**

Hi, My current Spanish class is performing an oral presentation on advice for losing weight or being fit. I was wondering if somebody could proofread my Spanish speaking portion and point out the obvious errors? I'm terrible at Spanish so there's probably quite a few ...
*Tuesday, January 7, 2014 at 11:01pm*

**elementary**

number sense Edie wanted to subtract 273-188.she began by finding 2-1.what did edie do wrong?
*Tuesday, January 7, 2014 at 7:50pm*

**elementary**

5
*Monday, January 6, 2014 at 5:55pm*

**Elementary Math**

You are correct. Any time you need to divide, you can always multiply by the reciprocal. That is, dividing by 2 is the same as multiplying by 1/2 (or 0.5) In this case, I'm surprised that the question of division even arose, since you knew how many miles you could go on 1 ...
*Friday, January 3, 2014 at 5:33am*

**Elementary Math**

I had her do an exact 15.4 x .7 and came up with 10.78. Just wanted to show her that this was the correct way of doing this problem. She didn't believe me :) Thanks for your help and confirmation
*Friday, January 3, 2014 at 12:18am*

**Elementary Math**

multiply by 0.7 15.4 * 0.7 = 10.8
*Friday, January 3, 2014 at 12:08am*

**Elementary Math**

This is going to seem like a simple question but how do i solve this without dividing.. 5th grade math mom Question: Lester's car can go 15.4 miles on 1 gallon of gas. How far can he go on 0.7 gallons? Thanks
*Thursday, January 2, 2014 at 11:38pm*

**Statistics**

Can someone please help with this problem to advise how to set up and in the book Essential of Statistics for the Behavioral Sciences. A researcher is investigating the effectiveness of a new study-skills training program for elementary school children. A sample of n=25 third-...
*Friday, December 20, 2013 at 10:36pm*

**Math**

"You have been asked to help build a rectangular play area at the new Tracy elementary school. You arrive at the site eager to begin! Much to your surprise, the only things available to work with are two pieces of rope. Explain how you can use the rope to find the ...
*Friday, December 20, 2013 at 11:43am*

**English**

What is a PERFECT essay about Sandy Hook Elementary School?
*Sunday, December 15, 2013 at 5:46pm*

**PHYSICS**

First Calculate the KE of the sledge hammer. 2: Calculate the speed of the Merry-go-round (MGR) from m1.v1+m2.v2=m1.v1'+m2.v2'. Note: v2 and v1' are zero 3: Calculate angular KE of the MGR 4: Lost energy =1-3 So if you can't solve this then you should go to ...
*Monday, December 9, 2013 at 6:15am*

**elementary my dear wanda **

It very simple, you must study hard much if you look for wanting better marks in you're physics, you know good
*Saturday, December 7, 2013 at 2:10pm*

**Math2**

A "quick picture" is an estimate than? 5 x 2.7 ..... 5 x 3= 15 Its been a long time since elementary school and I do not remember "quick picture" The question was How can you use a "quick picture" to find 5 x 2.7? the answer is 13.5.......an ...
*Thursday, December 5, 2013 at 1:41pm*

**elementary statistics**

There are different ways you can do this kind of problem, but the formula below might be one of the easier ways: s/[1 + (1.645/√2n)] ..to.. s/[1 - (1.645/√2n)] ...where s = standard deviation, 1.645 represents the 90% confidence interval using a z-table, and n = ...
*Monday, December 2, 2013 at 5:42pm*

**Physical Science**

What are the noninvasive benefits of the medical technologies that rely on physics of elementary particles?
*Monday, December 2, 2013 at 12:36pm*

**Physical Science**

What are three medical technologies that rely on the physics of elementary particles?
*Monday, December 2, 2013 at 12:32pm*

**5th grade math**

In the fourth grade class at Baker Elementary, 9 students are left-handed. The fifth grade has 7 left-handed students and the sixth grade has 6. The number of students in the fourth grade is 3 times the number of left-handed students in the class. The sixth grade has 3 more ...
*Sunday, December 1, 2013 at 8:35pm*

**elementary statistics**

A statistics professor is used to having a variance in his class grades of no more than 100. He feels that his current group of students is different, and so he examines a random sample of midterm grades (listed below). At 0.05 alpha level can it be conculded that the variance...
*Saturday, November 30, 2013 at 10:30pm*

**elementary statistics**

A statistics professor is used to having a variance in his class grades of no more than 100. He feels that his current group of students is different, and so he examines a random sample of midterm grades (listed below). At 0.05 alpha level can it be conculded that the variance...
*Saturday, November 30, 2013 at 7:44pm*

**Solar Energy Please Help**

The figure below presents the EQE of a triple junction solar cell with junctions A, B and C under short circuited (V = 0 V) condition. EQE table is: A: EQE = 0.7 wavelength= 300 to 650 nm B: EQE = 0.9 Wavelength= 650 to 850 nm C: EQE = 0.8 Wavelength= 850 to 1250 nm a) What is...
*Saturday, November 23, 2013 at 4:06am*

**TRIPLE JUNCTION SOLAR CELL - I **

The figure below presents the EQE of a triple junction solar cell with junctions A, B and C under short circuited (V = 0 V) condition. EQE table is: A: EQE = 0.7 wavelength= 300 to 650 nm B: EQE = 0.9 Wavelength= 650 to 850 nm C: EQE = 0.8 Wavelength= 850 to 1250 nm a) What is...
*Saturday, November 23, 2013 at 4:02am*

**math check**

Tat depends. I lived only a couple hundred meters from my elementary school, but several kilometers from my high school.
*Sunday, November 17, 2013 at 6:57pm*

**Chemistry**

I am working on a solid chemistry problem, but I do understand what e^ means. Is it the elementary charge? or Faraday constant. Please help.
*Saturday, November 16, 2013 at 7:16am*

**Calculus Inegral**

This does not have an answer in elementary functions. Ei(2lnx)
*Thursday, November 14, 2013 at 6:34pm*

**Statistics**

A random sample of 50 students chosen from an elementary school with 400 students was found to have a mean allowance of $26 per week with a standard deviation of $8. Obtain a 98% confidence interval for the total amount of allowance money given to students in this school per ...
*Wednesday, November 13, 2013 at 4:32pm*

**Language**

I miss placed my word list and my assignment is due tomorrow and I need to access my word list from my teacher Shirley Carr at Adlai Stevenson elementary second grade class can this site help me with that I am not a member and do not know if my teacher or school is either
*Monday, November 11, 2013 at 3:37pm*

**Physics Urgent please help**

jasonhafner 4 days ago As stated in the first lecture, "e" is the elementary charge unit,and never means the electron charge. Professor's explaination confuse the 4th answer.
*Monday, November 11, 2013 at 8:50am*

**Poem: Annabel Lee by Edgar Allen Poe**

MONDAY November 4, 2013 SCHOOL SUBJECTS Art Business Computers English Foreign Languages Health Home Economics Math Music Physical Education Science Social Studies GRADE LEVELS Preschool Kindergarten Elementary School 1st Grade 2nd Grade 3rd Grade 4th Grade 5th Grade 6th ...
*Monday, November 4, 2013 at 4:52pm*

**English**

We heard tommy's loud drumming clearly despite the _______ of the elementary school band practice. A. Esprit B. Concordance C. Animadversion
*Monday, October 28, 2013 at 4:09am*

**Solar Energy Please Help**

Figure 1 shows a simplication of the AM1.5 solar spectrum at 1000W/m2. The spectrum is divided in three spectral ranges: A for 0nm<λ<620nm B for 620nm<λ<1240nm C for 1240nm<λ<1860nm The photon flux in each spectral range is also shown in the ...
*Saturday, October 26, 2013 at 2:50pm*

**Solar Energy Please Help**

The figure below presents the EQE of a triple junction solar cell with junctions A, B and C under short circuited (V = 0 V) condition. a) What is the bandgap (in eV) of the absorber layer of the junction A? b) What is the bandgap (in eV) of the absorber layer of the junction B...
*Saturday, October 26, 2013 at 2:47pm*

**Psychology/ Ms Sue**

Please check my answers 1. During puberty, boys testosterone production increases up to 5 times the level in childhood? True 2. Babies of teenagers have a higher risk of birth complications? True 3. Most STIs are fatal if not treated properly? False 4. Analytic thinking and ...
*Sunday, October 20, 2013 at 4:42pm*

**Introduction to computers**

What type of device is characteristic environment? a. a workstation used by a retired person b.a workstation usedat an engineering firm c.a tablet computer used by an elementary school student d. a notebook used by a college student
*Thursday, October 17, 2013 at 6:53pm*

**Solar Energy Help ASAP**

The current density of an ideal p-n junction under illumination can be described by: J(V)=Jph−J0(eqVkT−1) where Jph is the photo-current density, J0 the saturation-current density, q the elementary charge, V the voltage, k the Boltzmann's constant, and T the ...
*Thursday, October 17, 2013 at 3:50pm*

**ET3034TUx Solar Energy**

The current density of an ideal p-n junction under illumination can be described by: J(V)=Jph−J0(eqVkT−1) where Jph is the photo-current density, J0 the saturation-current density, q the elementary charge, V the voltage, k the Boltzmann's constant, and T the ...
*Wednesday, October 16, 2013 at 2:20pm*

**Elementary Stats**

10/.70
*Tuesday, October 15, 2013 at 10:24pm*

**help**

Assume that the salaries of elementary school teachers in the U.S. are normally distributed with a mean of $37,000 and standard deviation of $3500. The cutoff salary for teachers in the bottom 12% is
*Sunday, October 13, 2013 at 12:23pm*

**English**

I am writing a personal narrative and we have to include significance like what we learned from that memory. My memory is about me getting stung by a bee in elementary school but I can't think of any significance. Help please? Thanks!
*Thursday, September 26, 2013 at 8:09pm*

**elementary functions**

f(x+h) = (x+h)^2 + x+h - 3 = x^2 + 2xh + h^2 + x + h - 3 then ( f(x+h) - f(x) )/h = (x^2 + 2xh + h^2 + x +h - 3 - x^2 - x + 3)/h = ( 2xh + h^2 +h)/h = h(2x + h + 1)/h = 2x + h + 1 , h ≠0
*Tuesday, September 17, 2013 at 9:34pm*

**elementary functions**

f(x)=x(squared)+x-3. compute the difference quotient: (f(x+h)-f(x))/h
*Tuesday, September 17, 2013 at 9:27pm*

**Math**

There are 648 students in 5th grade at oak elementary school. For the upcming field trip,they need to be split into groups of 25. About how many groups are needed?
*Thursday, September 12, 2013 at 7:37pm*

**SS**

If you're an elementary or high school student, you're probably right, unless your hot lunch fee is already paid. In other situations, any of these answers could be correct.
*Tuesday, September 10, 2013 at 1:43pm*

**social studies**

Question 1: I have (5) Question 2: I have (c) 2>>Based on the result of the studies, what should an elementary teacher do to unsure that a child with an unusual name develops normal intellectual ability? a- Make a special effort to ignore the child b- Try to give the ...
*Sunday, September 8, 2013 at 1:02pm*

**statistics**

Researchers conducted a survey of parents of 66 kindergarten children. The parents were asked whether they played games with their children. The parents were divided into two groups: working class and middle class. The researchers wanted to know if there was an association ...
*Friday, August 23, 2013 at 9:08pm*

**Math/Statistics**

A statistics teacher believes that the final exam grade for her elementary stats class have a normal distribution with a mean of 82 and a standard deviation on 8. Find the score which separates the top 10% of the scores from the lowest 90% of the scores.
*Sunday, August 11, 2013 at 8:51pm*

**Discrete Mathematics-Elementary graph theory**

A cycle graph is like a polygons with vertices along the circumference. A complete graph is one where EACH vertex is connect to EVERY OTHER vertex (except itself). Using these definitions, are you able to answer the question?
*Thursday, August 8, 2013 at 9:44pm*

**Discrete Mathematics-Elementary graph theory**

No it does not matter. You can even use a wavy line. However, we usually use a straight line unless we would like to avoid certain crossing of lines.
*Thursday, August 8, 2013 at 9:42pm*

**Calculus-Series**

I assume the expression is (n^3)* (e^(-n^4)) for n=1 to +&inf; You can use the ratio test to show that it converges, namely, show that an+1/an < 1 ∀ k≥1. The integral test will result in a definite integral from 1 to +&inf; which is not an elementary function, but...
*Monday, July 29, 2013 at 11:08am*

**Elementary mechanics**

My answer is the Rise Time or time to reach max. height. R = Vo*cosA * (Tr+Tf) Tr = Tf. Therefore, R = Vo*cosA * 2Tr. Tr = Rise time. Tf = Fall time. Vo*cosA = Hor. component of initial velocity.
*Tuesday, July 16, 2013 at 7:03pm*

**Elementary mechanics**

the gravitational constant G =6.67•10⁻¹¹ N•m²/kg², M=1.9•10²⁷ kg !!!!!!!!!!!! R=7.15•10⁷ m !!!!!!!! v=sqrt(2GM/R)= =59539 m/s ≈59.5 km/s
*Tuesday, July 16, 2013 at 3:25am*

**Elementary mechanics**

Given that the mass and radius of jupiter are respectively 190000000kg 7150000km.Calculate the escape velocity from the surface of the planet(a)11.2 km/s(b)33.3km/s(c)59.5km/s(d)110.4km/s
*Monday, July 15, 2013 at 4:30pm*

**Elementary mechanics**

what is common to the variation in the range and the hieght of a projectile. I'm thinking of horizontal acceleration pls what do u think
*Monday, July 15, 2013 at 12:07pm*

**Elementary mechanics**

Use the kinematics equation: Vf=Vi+at where Vf=final velocity=i-2j (m/s) Vi=initial velocity, yet unknown a=acceleration=F/m (in vector form) t=time=10 s a=(2i+7j)/5=0.4i + 1.4j Vf=(i-2j)+(0.4i+1.4j)(10) =(i-2j)+(4i+14j) =5i+12j
*Sunday, July 14, 2013 at 7:29pm*

**Elementary mechanics**

F1 = 100[170o] F2 = 100[50o] X = 100*cos170+100*cos50o = -34.2 N. Y = 100*sin170+100*sin50 = 94 N. tan Ar = Y/X = 94/-34.2 = -2.74838 Ar = -70o = Reference angle. A = -70+180 = 110o Fr = X/cosA = -34.2/cos110 = 100N.[110o]
*Sunday, July 14, 2013 at 4:29pm*

**Elementary mechanics**

A force of 2i+7jN acts on a body of mass 5kg for 10 seconds. The body was initally moving with constant velocity of i-2jm/s.Find the final velocity of the body in m/s, in vector form. (a)5i+12j(b)12i-5j(c)10i-7j(d)7i+10j
*Sunday, July 14, 2013 at 3:12pm*

**Elementary mechanics**

(Q1) 2 forces act on a point object as follows: 100 at 170 and 100 at 50.Find the resultant force (a)110N at 50 (b)110N at 100 (c)100N at 110 (d) 100N at 50 (Q2) given 3 vectors a=-i-4j+2k,b=3i+2j-2k,c=2i-3j+k,Calculate a-(b-c) (a)-6(b)6(d)9(d)-9 (Q3)The resultant of ...
*Friday, July 12, 2013 at 5:21pm*

**STEVE or REINY-plz help!**

I don't think this can be solved using elementary functions.
*Tuesday, July 9, 2013 at 11:00am*

**Math 213 Elementary Math**

you have a friend named Max. He and his four friends are having ice cream. There are only three flavors available at the ice cream store they are visiting: chocolate, vanilla and strawberry. One of Max’s friends, Stacey, eats chocolate exclusively. How many different ...
*Tuesday, June 11, 2013 at 9:30am*

**elementary algebra**

(3b+1)^2=16 3b+1 = ±4 3b+1 = 4 b = 1 or 3b+1 = -4 b = 5/3
*Thursday, June 6, 2013 at 3:15pm*

**elementary algebra**

(3b+1) (3b +1) = 16 9b^2 + 3b +3b + 1 = 16 9b^2 + 6b + 1 = 16 9b^2 + 6b + 1 -16 = 16-16 9b^2 + 6b -15 = 0 3(3b^2 + 2b -5) = 0 3(b-1)(3b+5) = 0 b - 1 = 0 3b + 5 = 0 b -1+1 = 0 + 1 3b + 5 - 5 = 0-5 b = 1 3b = -5 3b/3 = -5/3 b = -5/3 b = 1, -5/3
*Thursday, June 6, 2013 at 2:38pm*

**elementary algebra**

(3b+1)^2=16
*Thursday, June 6, 2013 at 2:21pm*

**Statistics**

In an elementary school, 25% of children wear glasses. Suppose that a random sample of 64 children is selected. Find the mean number of children in the sample who wear glasses. Round your answer to the nearest integer.
*Sunday, June 2, 2013 at 11:24pm*

**Statistics**

In an elementary school, 25% of children wear glasses. Suppose that a random sample of 64 children is selected. Find the mean number of children in the sample who wear glasses. Round your answer to the nearest integer.
*Sunday, June 2, 2013 at 11:24pm*

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