Thursday

April 17, 2014

April 17, 2014

Post a New Question | Current Questions

**math**

mmmh, been messing around this for a while from 1st: x(x + y + 1) = 81 from 2nd: y(y + x + 1) = 51 divide them: x/y = 81/51 81y = 51x -----> y = 51x/81 sub that into x^2 + xy + x = 81 81x^2 + x(51x/81) + x = 81 81x^2 + 51x^2 + 81x = 6561 132x^2 + 81x - 6561 = 0 x = (-81 &...
*Tuesday, April 16, 2013 at 8:59am*

**Literature Help?**

The 2nd sentence is correct - No one likes to be uncomfortable while sleeping.
*Tuesday, April 16, 2013 at 12:15am*

**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*

**math**

selling price of each --- x cost price of first = x/1.25 cost price of 2nd = x/9 total cost price = x/1.25 + x/.9 = 4x/5 + 10x/9 = 86x/45 profit / loss = selling price/cost price = 2x / (86x/45) = 2(45/86) = 1.0465... so he made a profit of 4.65% e.g. suppose he sold both at $...
*Monday, April 15, 2013 at 10:10am*

**math**

I need the slope or a 2nd point.
*Thursday, April 11, 2013 at 8:35pm*

**chemistry**

Please i tried to give this answer on a quiz but it was not accepted. To name this alkane: CH3CH2CH2CHCH3 with a substituent of CH3 on 2nd carbon.
*Thursday, April 11, 2013 at 1:05am*

**Calculus Word Problem**

assume each pen encloses 200 square feet of area in the 2nd part sorry!
*Wednesday, April 10, 2013 at 1:49pm*

**language**

I agree with your 2nd and 3rd answers.
*Wednesday, April 10, 2013 at 1:44am*

**Chemistry - DrBob Help!**

Draw product for chlorination of 2methylbutane through a 2nd radical
*Wednesday, April 10, 2013 at 12:26am*

**8th grade**

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

**algebra**

look over the equations and decide which variable would be the "easier" one to eliminate. In the first I would choose the z add the last two equations: 8x + 6y = 0 = 20 reduce to 4x + 3y = 10 2nd times 4 : 8x - 4y + 4z = 12 3x + 2y + 4z = 19 , now subtract those two...
*Monday, April 8, 2013 at 8:44am*

**Math**

Factor the trinomial completely. y to the 3rd power minus 14y to the 2nd power plus 48y
*Thursday, April 4, 2013 at 3:30pm*

**Algebra 8th grade**

Multiply both sides of the 1st Eq by -6. Multiply both sides of the 2nd Eq by 3. Then add the Eqs. -18a - 30b = -420 +18a + 27b = 405 -3b = -15 b = 5. in the 1st Eq, replace b by 5: 3a + 5*5 = 70 3a = 70-25 = 45 a = 15
*Wednesday, April 3, 2013 at 3:08pm*

**math**

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

**Math**

first hotel charge ---- $x 2nd hotel charger ---- $x+1000 .04x + .07(x+1000) = 455 how about multiplying each term by 100 if you don't like decimals 4x + 7(x+1000) = 45500 11x + 7000 = 45500 11x = 38500 x = 3500 first hotel cost $3500 2nd hotel cost $4500 check: .04(3500...
*Monday, April 1, 2013 at 9:18am*

**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*

**Statistics**

the 2nd the answer is 159.95
*Thursday, March 28, 2013 at 2:57pm*

**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*

**Math**

yes, 2nd line: 18a^2 - 12a + 36ab - 2b all the terms are different, so you are done
*Wednesday, March 27, 2013 at 8:07am*

**algebra 2nd try**

(2√3:((49)^(2)))/(49)
*Saturday, March 23, 2013 at 5:54pm*

**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*

**writing**

Delete the word 'personally.' It's redundant. Then make the fragment (2nd group of words) into a complete sentence.
*Monday, March 18, 2013 at 10:51pm*

**MATH**

proceed with the following argument Whatever number you pick, the prob that the second person picks a different number is 89/90 the prob that the 2nd and 3rd person will pick a different number = (89/90)(88/90) the prob that the 2nd, the 3rd and the 4th pick different numbers...
*Saturday, March 16, 2013 at 9:23pm*

**English**

Both your guesses for the 2nd question are too detailed. They're incorrect.
*Friday, March 15, 2013 at 12:44am*

**Math (algerba 1)**

(4 X 10 to the -5th power) to the 2nd power. How would I solve this?
*Wednesday, March 13, 2013 at 7:20pm*

**Math**

The two equations would have to reduce to one same equation. e.g. 2x + 3y = 8 4x + 6y = 16 notice the 2nd is twice the first.
*Sunday, March 10, 2013 at 5:13pm*

**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*

**algebra**

first part --- x 2nd part --- y 3rd part ---- 50000-x-y interest on 1st = .08x interest on 2nd = .06y 3rd interest = .09(50000-x-y) but .08x = 2(.06)y 8x = 12y y = 8x/12 = 4x/3 .08x + .06y + .09(50000-x-y) = 3960 sub in y = 4x/3 and solve I am sure you can take it from here
*Thursday, March 7, 2013 at 10:16am*

**Language arts please check this**

i think the 2nd one sounds better, but thats what i think
*Wednesday, March 6, 2013 at 6:43pm*

**math hw**

area of first = length1 x width 15 = length1 x width width = 15/length1 area of 2nd: 16 = length2 x width width = 16/length2 so length2/length1 = 16/15 the length of the first is 15, its width is 1 the length of the 2nd is 16, its width is 1 the largest value of the width has ...
*Tuesday, March 5, 2013 at 10:54pm*

**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*

**math**

rate of first --- $x rate of 2nd ---- $ (160-x) 5x + 15(160-x) = 1750 5x + 2400 - 15x = 1750 -10x = -650 x = 65 1st one charged $65 per hour 2nd charged $95 per hour check: 5(65) + 15(95) = 1750 65+95 = 160
*Tuesday, March 5, 2013 at 3:02pm*

**Math (2nd Try)**

OR P = 6 x y ( 2x ^ 2 y + 1 ) + 2
*Friday, March 1, 2013 at 10:51am*

**Math (2nd Try)**

OR P = 2 ( 6 x ^ 3 y ^ 2 + 3 x y + 1 ) P = 12 x ^ 3 y ^ 2 + 6 x y + 2 P = x y ( 12 x ^ 2 y + 6 ) + 2
*Friday, March 1, 2013 at 10:49am*

**Math (2nd Try)**

P = 2 l + 2 w P = 2 ( l + w ) P = 2 ( 6 x ^ 3 y ^ 2 - 1 + 3 x y + 2 ) P = 2 ( 6 x ^ 3 y ^ 2 + 3 x y + 1 )
*Friday, March 1, 2013 at 10:45am*

**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*

**math**

subtracting the 2nd equation from the first gives 7b = 21 That should help.
*Saturday, February 16, 2013 at 7:06pm*

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

**Chem Help!!!!**

I just need a solution to the first half of the question I figured out the 2nd half
*Monday, February 4, 2013 at 9:13pm*

**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*

**physics**

d1 = 0.5g*t^2 = 30-3.2 = 26.8. 4.9t^2 = 26.8 t^2 = 5.47 t = 2.34 s. = Fall time of 1st stone. The 2nd stone must fall 30 meters in 2.34 s. d2 = Vo*t + 0.5g*t^2 = 30 m. Vo*2.34 + 4.9(2.34)^2 = 30 2.34Vo + 26.83 = 30 2.34Vo = 30-26.83 = 3.17 Vo = 1.35 m/s. = Initial velocity of ...
*Sunday, January 27, 2013 at 4:40pm*

**Pre-Calculus**

from the 1st ---> 4x-9 = y sub that into the 2nd 2x + 3(4x-9) = 12 2x + 12x - 27 = 12 14x = 39 x = 39/14 y = 4(39/14) - 9 = 15/7 check: 1st: LS = 4(39/14) - 15/7 = 156/14 - 30/14 = 126/14 = 9 = RS 2nd: LS = 2(39/14) + 3(15/7) = 39/7+ 45/7 = 84/7 = 12 = RS
*Tuesday, January 22, 2013 at 9:56pm*

**math**

The 8 in the first number represents 8 Million. The in the 2nd number is 80,000.
*Friday, January 18, 2013 at 3:53pm*

**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*

**Maths**

I noticed a small typo 2nd line clearly should have said let Rsin(x+a) = 5cosx + 12sinx
*Tuesday, January 15, 2013 at 9:42am*

**maths**

if sinx=3/5,cosy=12/13,where x and y both lie in 2nd quadrant, find the value of sin(x+y),cos(x-y),tan(x+y)?
*Tuesday, January 15, 2013 at 12:19am*

**8th grade math**

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

**Monsiure's Departure by Elizabeth I question**

I've got it. I thought it was mainly because she constantly complains how unhappy she is in the 2nd and 3rd Stanza, and how fragile she is.
*Thursday, January 10, 2013 at 8:39am*

**8th grade math**

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

**Math steve**

even though that is -a? you wrote it as positive a to the -2 power = 1/a to the 2nd ...just making sure
*Wednesday, January 9, 2013 at 2:46pm*

**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**

YourWelcome . and for the 2nd question: 435/.15 = 2,900$
*Tuesday, January 8, 2013 at 4:14pm*

**Geometry**

What is the equation of a line through (-2,5) and whose segment intercepted between the axes in the 2nd quadrant is 7sqrt2? Please help me solve this
*Monday, January 7, 2013 at 5:05pm*

**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**

one way: 3a+2p = 51 2a+3p = 46.50 add them up: 5a+5p = 97.50 multiply by 6/5: 6a+6p = 97.0 * 6/5 = 117.00 note that we didn't have to know how much each item cost. another way: multiply 1st by 2 and 2nd by 3 to get 6a+4p = 102 6a+9p = 139.50 subtract 1st from 2nd to get 5p...
*Friday, December 28, 2012 at 10:36am*

**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*

**Math**

Purchase price of first : 1.2x = 24000 x = 24000/1.2 = 20,000 purchase price of 2nd: .8y = 24000 y = 24000/.8 = 30,000 total purchase price = 50,000 total selling price = 48.000 loss on investment = 50000-48000 = 2,000 check: on first: profit = 4000 percentage profit = 4000/...
*Thursday, December 20, 2012 at 9:25am*

**5th grade**

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

**math:)**

If you are just learning this, I suggest you make a sketch of the right-angled triangle a) and b) will be in quadrant I c) and d) will be in quadrant II I will do b) and c) b) by Pythagoras, it is easy to find the hypotenuse to be 13 since cosØ = 12/13 use the cosine ...
*Tuesday, December 18, 2012 at 10:29pm*

**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**

If you put P and Q on the same grid, did you notice that OQ is an extension of OP ? so the angle formed by OP and OQ are the same notice the hypotenuse of the smaller triangle is 5 by Pythagoras, and of the larger triangle it is 15 try this on your calculator: 2nd cos ( -3&...
*Tuesday, December 18, 2012 at 9:42pm*

**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*

**math**

-25 plus 4 to the 2nd power times 3 minus 5 to the 3rd power
*Wednesday, December 12, 2012 at 6:48pm*

**maths --plse help me..**

direction vector of 1st line = (4,6,2) or reduced to (2,3,1) parametric equation of 1st: x = 0 + 2t y = -1 + 3t z = -1 + t direction vector of 2nd line = (7, 5, 0) parametric equation of 2nd: x = 3 + 7k y = 9 + 5k z = 4 solving for x's 0+2t = 3 + 7k 2t = 3+ 7k (#1) solving...
*Wednesday, December 12, 2012 at 11:46am*

**Math**

1st package --- x 2nd package -- 3x 3rd package -- 3x/2 4th: 3x/2 + 3 = 15 3x + 6 = 30 3x = 24 x=8 1st : 8 2nd : 24 3rd : 12 4th :15 Add them up. check : is 15 equal to 3 more than 12 ? YES
*Tuesday, December 11, 2012 at 9:16pm*

**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*

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

I'm from connections and in 7th grade ._.
*Sunday, December 9, 2012 at 5:18pm*

**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*

**Math**

2nd for sure.
*Tuesday, November 27, 2012 at 11:11pm*

**Chemistry**

This helped me with the amount in grams of Cr2O3, but what do I do with the 2nd part, the 35.0 ml of 6.26M chromic acid?
*Tuesday, November 27, 2012 at 8:35pm*

**math - Ms. Sue**

(9/2 + 1)/(-2 + 5/3) = 11/2 / -1/3 = -33/2 looks like you lost a - sign somewhere. The 2nd point is above and to the left of the 1st, so the line has a negative slope.
*Friday, November 23, 2012 at 6:45pm*

**Math 8R: Operating w/ Sci.Notation HELP! (2ND QS)**

DON'T SOLVE THE PROBLEM FOR ME! I just need the equation so I can solve it MYSELF. thank you! :)
*Tuesday, November 20, 2012 at 8:19pm*

**Math 8R - Operating with Scientific Notation HELP!**

Rhode Island is the smallest state. It has an area of approximately 1.55 x10 (to the 3rd power) square miles. Alaska is the largest state. The area of Alaska is 4.28 x 10 (to the 2nd power) times greater than the area of Rhode Island. What is the approximate area of Alaska in ...
*Tuesday, November 20, 2012 at 7:59pm*

**posibility**

P(w) = 3/6 p(ww) = 3/6 * 2/5 = 1/5 so, the chance that 2 women in a row are chosen first is 1/5. That is the chance that no man will be interviewed 1st or 2nd.
*Friday, November 16, 2012 at 8:27pm*

**math - 5th grade**

I'm in the 1st grade! no joke! And Wendy the answer is For five tenths is one half!
*Tuesday, November 13, 2012 at 4:52pm*

**math**

If sinx=3/5,cosy=-12/13,where x and y both lie in 2nd quad.Find the value os sin(x+y).
*Tuesday, November 13, 2012 at 2:06pm*

**Java/programming**

Suppose that a float variable called score contains the overall points earned for this course and a char variable grade contains the final grade. The following set of cascaded if-then-else pseudocode statements determines your final grade
*Monday, November 12, 2012 at 6:58pm*

**math**

Hannah's grade on her last math test was 4 points more than Mark's grade. Write an expression for Hannah's grade, using m as a variable. Evaluate the expression if m=92.
*Sunday, November 11, 2012 at 9:48pm*

**math**

subtract the 2nd equation from the first, and the y's go away: 2x = 4 x = 2 now, use x=2 to find y: 6(2)-12y=12 y=0
*Sunday, November 11, 2012 at 7:41am*

**Math**

for the 2nd one is it 0.1? 100g=0.1kg
*Tuesday, November 6, 2012 at 7:34pm*

**Math**

2nd one 2000?
*Tuesday, November 6, 2012 at 6:45pm*

**Math Statistics**

Kesha's mean grade for the first two terms was 74. What grade must she get in the third term to get an exact passing average of 75?
*Tuesday, November 6, 2012 at 4:15am*

**Math Statistics**

Kesha's mean grade for the first two terms was 74. What grade must she get in the third term to get an exact passing average of 75?
*Tuesday, November 6, 2012 at 4:14am*

**math**

kindergarten-fifth grade= a total of 6 grade levels 6 grade levels times 3 classes for each grade level= a total of 18 classes for the whole school 18 classes times 27 students per classroom= 486 the final answer is: about 486 students
*Monday, November 5, 2012 at 7:52pm*

**math**

the manager of a starbucks store plans to mix A grade coffee that cost 9.50 per pound with grade B coffee that cost 7.00 per pound to create a 20 pound blend that will sell for 8.50 a pound. how many pounds of each grade coffee are required?
*Tuesday, October 30, 2012 at 8:32am*

**7th grade math help asap plz**

i'm in the 6th grade and i know the answere to that!!
*Thursday, October 25, 2012 at 9:26pm*

**math**

I am curious at what level of math this is from. It looks like you are looking at divisibility of numbers Here are some basic rules: - any number of course is divisible by 1 - to be divisible by 2 , the number has to be even so the 2nd digit must be even - to be divisible by 3...
*Thursday, October 25, 2012 at 5:48pm*

**Social Studies 8R (2nd question)**

You're welcome. OK.
*Tuesday, October 23, 2012 at 9:06pm*

**Social Studies 8R (2nd question)**

Right.
*Tuesday, October 23, 2012 at 9:02pm*

**Social Studies 8 - help!!!!! (2nd question)**

You're welcome.
*Monday, October 22, 2012 at 9:00pm*

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