Wednesday

April 16, 2014

April 16, 2014

Post a New Question | Current Questions

**Math quick help anyone**

since the slope is 1/4, you know that y will increase by 1 when x increases by 4. Since x increased from -12 to 8 (20), y will increase by 1/4 (20) = 5. So, w=6+5=11. If the slope had been -1/4, w = 6-5 = 1 #2. multiply the 1st equation by 3 and you now have 9x-6y-24=0 9x-6y-...
*Thursday, January 16, 2014 at 12:23am*

**Math**

well, the 2nd equation says y = 3.5/(3x+1) so, plugging that into the 1st equation, we have x^3 - 12.25/(3x+1)^2 = 7.75 (36x^5+24x^4+4x^3-279x^2-186x-80) / 4(3x+1)^2 = 0 a little synthetic division yields x=2
*Wednesday, January 15, 2014 at 5:46pm*

**Physics help**

I'm trying to calculate the tension in a rope. The two ropes are holding up a picture frame that is 100N, each rope is at a 45 degree angle. I'm trying to find the value of the tension of the 1st rope. Please help
*Friday, January 10, 2014 at 10:56pm*

**8th Grade Connections Academy**

i'm in 7th grade in connections academy at ripon
*Wednesday, January 8, 2014 at 6:12pm*

**Math - Algebra**

Von's arcade uses 3 different colored tokens for its game machines. For 500, you can purchase any of the following combinations of tokens: 8 gold, 18 silver, and 7 bronze tokens; 8 gold, 14 silver, and 13 bronze tokens; or 16 gold, 6 silver, and 9 bronze tokens. What is ...
*Saturday, January 4, 2014 at 9:26pm*

**math**

Treat these as if they were equations but keeping the in-equality sign instead of the equal sign, EXCEPT when you multiply or divide the in-equation by a negative, you must reverse the inequality sign. e.g. last one: -8x > -64 I would have to divide by -8 to get +x , so x &...
*Thursday, December 19, 2013 at 12:07pm*

**Math**

1st one, in your head, a = 4 or a = -2 2. |2a+5| > 3 2a+5 > 3 OR -2a -5> 3 a > -2 OR a < -4 3. looks like a typo , I see neither an equation nor an in-equation. If it is one of those, first divide both sides by 3, then it is very easy.
*Tuesday, December 17, 2013 at 6:24pm*

**Math (7th grade)**

I have a math question that I do not really understand how to answer is there someone who can walk me through it? In Pinecrest middle school there are 58 6th graders 76 7th graders, and 38 8th graders. The counsel is made up of 35 students who are chosen to represent all three...
*Tuesday, December 17, 2013 at 3:42pm*

**physics**

An automobile moving at a constant velocity of 15 m/s passes a gasoline station. Two seconds later, another automobile leaves the station and accelerates at a constant rate of 2 m/s^2 in the same direction as the 1st automobile. How soon does the 2nd automobile overtake the ...
*Monday, December 16, 2013 at 4:36am*

**math**

just solve as for equations. If you find the roots, then for the parabola, y>=0 outside the interval containing the roots. For the cubic, you know y<0 where x is less than the smallest root. y>0 between the 1st and 2nd roots, y<0 between the 2nd and 3rd roots y>...
*Sunday, December 15, 2013 at 6:14pm*

**math**

1/13 = .076923076923076923... notice the repeat is 076923 is 6 digits long 1st after decimal is 0 7th after the decimal is 0 13th after the decimal is 0 ... 37th after the decimal is 0 43rd after the decimal is 0 notice that the numbers 1,7,13, ... 37, 43 all leave a remainder...
*Saturday, December 14, 2013 at 9:50pm*

**algerbra**

Since the + and = signs are on the same key, I suspect you meant 3x-2y = 8 2x+2y = 22 ---->x+y=11 --->y = 11-x sub into the 1st 3x - 2(11-x) = 8 3x - 22+2x = 8 5x = 30 x = 6 then y = 11-6 = 5
*Thursday, December 12, 2013 at 7:49pm*

**Mathematics**

The 25 term of an Arithmetic Progression is 7 1/2 and the sum of the first 23 terms is 98 1/2. Find the i. 1st term ii. common difference iii. sum of the first 30 terms
*Wednesday, December 11, 2013 at 7:25pm*

**college intermediate algebra**

1st person: X min. 2nd person: (X+20) min. X*(X+20)/(X+X+20) = 24 min. (X^2+20X)/(2X+20) = 24 X^2+20X = 48X+480 X^2-28X-480 = 0 Use Quadratic formula and get: X = 40 min. X+20 = 60 min.
*Tuesday, December 10, 2013 at 8:35pm*

**business math**

Bill's monthly payment is $1,056 per month. The principal is $100,000 at a rate of 12 1/2 percent for 35 years. The amount of interest for Bill's 1st payment is $1,011.67. True False
*Sunday, December 8, 2013 at 1:53am*

**math**

1st TV = 750 2nd TV = 750 * 0.55 = 412.50 3rd TV = 750 * 0.2 = 150 1.06(750 + 412.5 + 150) = $1,391.25
*Saturday, December 7, 2013 at 1:11pm*

**Math**

Did you mean 2x - 5y = -8 for the first one ? I will assume that is what you meant: Personally I would not use substitution, but .... from the 2nd 26-3x = 2y (26-3x)/2 = y into the 1st: 2x - 5(26-3x)/2 = -8 times 2 to get rid of that fraction ... 4x - 5(26-3x) = -16 4x - 130...
*Saturday, December 7, 2013 at 12:28am*

**i need help math**

1st TV = 750 2nd TV = 750 * 0.55 = 412.50 3rd TV = 750 * 0.2 = 150 1.06(750 + 412.5 + 150) = $1,391.25
*Friday, December 6, 2013 at 5:58pm*

**Algebra 2**

A grocer mixes x kg of Grade A and Y kg of Grade B nuts to get 60 kg of mixed nuts. Write and equation involving x and y to represent this information. The grocer sells all the mixed nuts at 9.00 per kg. He receives the same amount of money as when he sells the Grade A nuts ...
*Thursday, December 5, 2013 at 8:45pm*

**finance**

your finance text book sold 47,500 copies in the 1st year the publishing company expects the sales to grow at a rate of 23.0 percent for the next three years and by 12.0 percent in the fourth year calculate the total number of copies that the publisher expect to sell in year 3...
*Wednesday, December 4, 2013 at 5:20am*

**Math**

after 1st breath , diameter = 5cm after 2nd breath , diamieter = 1.2(5) = after 3rd breath, diameter = 5(1.2)^2=
*Tuesday, December 3, 2013 at 1:19am*

**Algebra!**

x+y=108 3.5x+7.5y=506 1st eq * 3.5 = 3.5x+3.5y = 378 subtract from second equation 4y = 128 y=32 x=76 (32+y=108 | 108-32 = 76)
*Monday, December 2, 2013 at 9:05pm*

**5th grade math**

4th Grade: 9 Left-handed students. Total = 3 * 9 = 27 Students. 9/27 = 1/3 Are left-handed. 5th Grade: 7 Left-handed students. Total = 30-2 = 28 Sudents. 7/28 = 1/4 Are left-handed. 6th Grade: 6 Left-handed students. Total = 27+3 = 30 Students. 6/30 = 1/5 Are left-handed. The ...
*Sunday, December 1, 2013 at 9:31pm*

**Math**

rearrange things a bit to get x-3y=5 3x-5y=7 If you multiply the 1st equation by 3, you have 3x-9y=15 3x-5y=7 Now just subtract to eliminate x and you get -4y = 8 y = -2 Now use either equation to solve for x.
*Wednesday, November 27, 2013 at 1:54pm*

**Algebra 1**

It is considered "poor form" to have the equation in standard form start with a negative x or containing fractions. so the 1st one I would write as x - y = -8 the last one: firs of all it should have been (-1/2)x + y = 23/2 multiply each term by -2 x - 2y = -23
*Thursday, November 21, 2013 at 9:10pm*

**Physics, Elena Please Help If u can.**

i gt q1 all the first part not second one? please help in it question 3 i got 1st part not second
*Wednesday, November 20, 2013 at 11:34pm*

**Math Help**

#2 is correct #3 solving your 2 equations: 1st times 2: 8b+6n=47 2nd times 3: 15b+6n=64.5 subtract them: 7b = 17.5 b = 2.5 sub back in ----> n = 4.5 necklace costs $4.50 and bracelet costs $2.50 so buying just one each = $7.00
*Tuesday, November 19, 2013 at 10:39am*

**Math 2 questions**

In #1, substitute x=3y+1 into 2nd equation in #2, substitute y=2x+4 into the 1st equation
*Tuesday, November 19, 2013 at 5:43am*

**TO ANY MATH HELPERS**

1. from the 1st equation: x = 3y+1 into the 2nd: 3(3y+1) - y +1 = 0 9y + 3 - y +1 = 0 8y = -4 y = -1/2 sub into 2nd: 3x - (-1/2) + 1 = 0 3x = -3/2 x = -1/2 Do #2 the same way from the 2nd: y = 2x+4 etc (Just stating the answers is not acceptable and serves no purpose)
*Monday, November 18, 2013 at 9:04pm*

**4th Grade Math: Help Is Needed ASAP**

My son is in the fourth grade and is needing help with these math problems. Can someone please help him with these problems. 1. 2/3+2/9= 2. 3/5+3/10= 3. 5/12+1/3= 4. Find the sum of 1/6 and 1/12 5. Add 1/4 to the answer in Exercise 4. 6. What is the sum of 1/8, 1/4, and 3/8? 7...
*Monday, November 18, 2013 at 8:21pm*

**math**

Carlos was 5feet,8inches tall at the beginning of ninth grade. he grew 4 3/4inches during that school year and 2 1/4inches during follow the summer. how tall was Carlos at the beginning of tenth grade? Express his height in feet and inches.
*Monday, November 18, 2013 at 12:02pm*

**Math--PLEASE HELP!!!**

10 cases for 1st draw, 10 for the 2nd, 10 for the third, 10 for the 4th prob = 1/10^4 = 1/10000 if ball is not returned prob = 1/(10*9*8*7) = 1/5040
*Thursday, November 14, 2013 at 10:27am*

**Math**

they both have length which is twice the width, so they are similar. comparing 1st to 2nd, width/width = length/length 44/35 = 88/70
*Wednesday, November 13, 2013 at 6:37pm*

**Math**

COMMON CORE? IT'S PART OF COMMON CORE, WHICH WILL ADVANCE ALL OUR KIDS TO NEXT GRADE LEVEL WEATHER OR NOT IF THEY PASS. If your kid is advanced they will be expected to maintain a certain percentage not based on their grade and if they don't they will be put in class ...
*Wednesday, November 13, 2013 at 5:19pm*

**algebra**

t = .10a + 2f + .5v + (3000 - d/100) assuming the area and volume of the 2nd house are the same, only 2f - d/100 changes. Since the 1st house paid 5000 in taxes, and we have new variables of d+2000 and f+10, the new taxes are 5000 + 2(10) - 20 = 5000 same taxes due
*Friday, November 8, 2013 at 12:02am*

**Chemistry**

No, I don't think is was useless to ask. And yes, I would have asked, also. And if I received a 2/25 on anything I would want to know what I did wrong. The teacher must be counting the assignment as a small fraction of the grade for you to still have an A. What to do? Your...
*Thursday, November 7, 2013 at 9:03pm*

**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*

**physics**

a woman weighs Fg=650 when standing on a stationary scale. The woman is riding an elevator from the 1st floor to the 10th floor. As the elevator approaches the 10th floor, it decreases its upward speed from 9 m/s to 1 m/s in a time interval of 1 second. What is the average ...
*Saturday, November 2, 2013 at 1:21pm*

**Physics**

WOMAN IN ELEVATOR A woman weighs Fg= 650 N when standing on a stationary scale. Now, the woman is riding an elevator from the 1st floor to the 10th floor. As the elevator approaches the 10th floor, it decreases its upward speed from 8 m/s to 1 m/s in a time interval of 1 s. ...
*Saturday, November 2, 2013 at 12:42pm*

**Physics **

A woman weighs Fg= 600 N when standing on a stationary scale. Now, the woman is riding an elevator from the 1st floor to the 10th floor. As the elevator approaches the 10th floor, it decreases its upward speed from 7 m/s to 1 m/s in a time interval of 1 s. What is the average ...
*Saturday, November 2, 2013 at 12:09am*

**question**

i need some advice im a freshmen in hghschool and i have one honor class this semester and the 1st term i got a 80.6 and im struggling more is it better to be in it or just take regular and have an a over a b are their any benefits of it
*Friday, November 1, 2013 at 10:38pm*

**Algebra 1**

amount earned by 1st --- x amount earned by 2nd --- 18500-x if first had earned 500 less, they would be the same x - 500 = 18500 - x 2x = 19000 x = 9500 one earned 9500 , the other 9000 6. time for car 3 --- x time for car 1 --- x+5 time for car 5 --- x +8 time for car 4 ---- ...
*Monday, October 28, 2013 at 8:08pm*

**algebra**

from the 1st: x = 7-2y into the 2nd: 6(7-2y) - 6y = 15 42 - 12y - 6y = 15 -18y = -27 y = 3/2 into x = 7-2y x = 7 - 3 = 4 x = 4, y = 3/2
*Sunday, October 27, 2013 at 1:14pm*

**Algebra Help**

let rate in 1st leg be x mph time takenfor 1st leg = 24/x hrs rate for 2nd leg = x-10 time for 2nd leg = 6/(x-10) remaining distance = 80-24-6 = 50 miles time for last leg = 50/(1.5x) time for whole trip at x mph = 80/x difference in times = 22 minutes = 22/60 hrs 80/x - 24/x...
*Friday, October 25, 2013 at 9:50pm*

**math 9**

change 2nd equation by dividing by 5 x = 1 - 5y sub into the 1st 3(1-5y) - 2y = 6 3 - 15y - 2y = 6 -17y = 3 y = -3/17 Without even going further, the only one that has that y value is C) I will leave it up to you to check that the x is correct by subbing my answer back into x...
*Sunday, October 20, 2013 at 10:33pm*

**math**

determine ratio for 4 feet to 32 inches & 10 days to 40 hours. for the 1st I got 48/32=3/2 but i'm not to sure about the other one, it would be less than 2 days?
*Sunday, October 20, 2013 at 4:39pm*

**correction - math**

1st one: if f(x) = x/(x+2) , then y = x/(x+2) step1: interchange the x and y variables to get the inverse as x = y/(y+2) step 2: solve this new equation for y x = y/(y+2) xy + 2x = y xy - y = -2x y(x-1) = -2x y = -2x/(x-1) or y = 2x/(1-x) f^-1 (x) = 2x/(1-x) now do the same ...
*Friday, October 18, 2013 at 12:12am*

**Geology**

Can someone please help me with my review? 1)What grade of metamorphism common rocks are formed in- --- Is it high grade? 2)What is the name of the most rapid kind of mass wasting is> -- Weathering? 3)How to tell is a rock is igneous, metamorphic or sedimentary. 4)How to ...
*Thursday, October 17, 2013 at 11:50pm*

**Geogoly**

Can someone please help me with my review? 1)What grade of metamorphism common rocks are formed in- --- Is it high grade? 2)What is the name of the most rapid kind of mass wasting is> -- Weathering? 3)How to tell is a rock is igneous, metamorphic or sedimentary. 4)How to ...
*Thursday, October 17, 2013 at 11:42pm*

**Pre Algebra**

In Wilbur's math class, his grade is based on the average score of six tests, each worth 100 points. Wilbur always worries about his grade. He knows that his average on the first four tests is 88.5. What is the lowest average he could get on his next two tests and still ...
*Thursday, October 17, 2013 at 8:58pm*

**maths**

using only the information you gave, sketch two triangles let the height of the tower be h let the length of the shadow at 45° be m then the length of the shadow at 30° is m+2x tan 45 = h/m and tan 30 = h/(m+2x) 1 = h/m and 1/√3 = h/(m+2x) m = h and m+2x = h&#...
*Thursday, October 17, 2013 at 12:51pm*

**Math**

using your rule, do you get the given sequence? Here's a method of attack: You know that 1+3+5+...+n = n^2 adding up the 1st n odd numbers gives you n^2. In your sequence, you have 1 1+4 1+4+6 1+4+6+8 which looks very similar. So, expect something with n^2 in it. 1 = 2^2-3...
*Monday, October 14, 2013 at 2:28pm*

**Algebra Homework, HELP!**

1 ) W = 4 L - 3 A = L * W = 297 L * ( 4 L - 3 ) = 297 4 L ^ 2 - 13 L = 297 Subtract 297 to both sides 4 L ^ 2 - 3 L - 297 = 297 - 297 4 L ^ 2 - 3 L - 297 = 0 Solutions : L = - 33 / 4 and L = 9 The length can't be negative so L = 9 in W = 4 L - 3 W = 4 * 9 - 3 W = 36 - 3 W...
*Monday, October 14, 2013 at 2:26am*

**maths**

A for the 1st one, 45 dollars per hour, x, is 45x. The fixed-service is a one-time thing so it's c = 45x + 65.The 2nd one is D. The original cost of the copier is 5,500. 5500-2500 = 3000. This is the cost reduction over the ten years. 3000/10 is 300: The amount it gets ...
*Saturday, October 12, 2013 at 11:13am*

**fast answer plss**

the sum of four angles about a point is 360degree.the measure of the 2nd angle is 6degreemore than 3times the 1st,the measure of the 3rd is 3degree more than twice the first,the measure of the 4th is 20 degree less than the 3rd.what is the measure of each angle?
*Friday, October 11, 2013 at 10:13am*

**answer fast plsss**

the measures of the2nd angle of a triangle is 20degree more than the complements of the first triangle and the 3rd angle is 4 degree less than half the supplement of the 1st.find the measure of each angle
*Friday, October 11, 2013 at 9:46am*

**answer fast plsss**

the measures of the2nd angle of a triangle is 20degree more than the complements of the first triangle and the 3rd angle is 4 degree less than half the supplement of the 1st.find the measure of each angle
*Friday, October 11, 2013 at 9:46am*

**VNS,Math**

let distance he went each way be x miles time for first leg = x/4 time for 2nd leg = x/3 x/4 + x/3 = 7/2 times 12 3x + 4x = 42 x = 6 he went 6 miles into the road check: time for 1st part = 6/4 hrs time for 2nd part = 6/3 hrs and 6/4 + 2 = 3/2 + 2 = 7/2
*Wednesday, October 9, 2013 at 1:41pm*

**Math**

now: 85000 1st year : 85000(1.05) 2nd year: 85000(1.05)^2 etc can you see what I did ?
*Monday, October 7, 2013 at 7:11pm*

**Algebra, help needed**

Yeah, it takes a bit of practice. Look for LCMs to get rid of stuff. In this case, since 3*2=6, we had to take 3 times the 1st to get 6 and 2 times the 3rd to get 6. Usually the errors come in watching the other coefficients. In the beginning, it helps to write everything down...
*Monday, October 7, 2013 at 12:27pm*

**College Math 45**

Mrs. Brown has 17 children in her first-grade class, and Mr. Lopez has 20 children in his second-grade class. The principal has been asked to select 1 student from one of the classes to appear at a PTA meeting. How many ways can the selection be made?
*Sunday, October 6, 2013 at 11:23pm*

**Math**

A 154-pound woman walks at 3.0 mph 0% grade for 5 min, runs at 5.5 mph 5% grade for 32 min. What is her total caloric expenditure?
*Sunday, October 6, 2013 at 12:54pm*

**Algebra**

add the 1st and 3rd 5y + 2z = -14 from the 2nd: z = -2y-5 plug into 5y + 2z = -14 5y + 2(-2y-5) = -14 y = -4 into the 3rd: 3x -24 = -21 3x =3 x = 1 btw: z = 3
*Friday, October 4, 2013 at 12:41pm*

**Math**

Julie has been offered two jobs. The 1st one pays $400 per week. The 2nd job pays $175 per week plus 15% commision of her sales. How much will she have to sell i n order for the 2nd job to pay as much as the first? how do you do this? i dont know the steps to.
*Thursday, October 3, 2013 at 7:44pm*

**Math**

ahh...those algebra days... so, anyways, here's what u do... 1) identify the variables: Let the 1st integer be "x" Let the 2nd integer be "(x+1)" Let the 3rd integer be "(x+2)" 2) now, set up the equation... 3(x+2) - 9 = x + (x+1) 3) SOLVE ...
*Wednesday, October 2, 2013 at 6:31pm*

**Shurley English Grade 4**

I'm suppose to write sentences from Grade 4 Shurley English book. I was suppose to bring book home and use page 25 - I forgot the book - anyone know what is on page 25? Thanks
*Wednesday, October 2, 2013 at 5:41pm*

**Second Grade Reading**

Hello. I am a tutor. I tutor second grade students. I need a good website that will give me great tips on how I can better teach my students how to read, spell, and pronounce words. Can you please help me find a website like that?
*Saturday, September 28, 2013 at 10:42pm*

**Math**

cos 4x = sin x 2cos^2 2x - 1 = sin x 2(1 - 2sin^2 x)^2 - 1 = sin x Now you have to solve a quartic in sin x. You know from the very 1st equation that pi/2 is a solution. The others are not so simple. Visit wolframalpha.com and enter solve cos 4x = sin x to see the graphs and ...
*Wednesday, September 25, 2013 at 5:51am*

**more News**

1. Here are some critical reading points: Exactly who are "senate democrats"? Is it three, or 51? 2. What is the point of View of the Wall Street Journal? What interest do they have in all this? Is it possible they are trying to calm their readers? Is it possible ...
*Tuesday, September 24, 2013 at 3:20pm*

**statistics**

suppose that grade point averages of undergraduate students at one university have a bell shaped distribution with a mean of 2.55 and a standard deviation of 0.43. Using the empirical rule, what percentage of students have grade point averages that are between 1.26 and 3.84
*Monday, September 23, 2013 at 9:10pm*

**Math**

number of cows = x number of chickens = y x+y = 197 4x + 2y = 634 or 2x + y = 317 subtract 2nd - 1st: x = 120 back into the first: 120+y = 197 y = 77 120 cows and 77 chickens
*Sunday, September 22, 2013 at 8:13pm*

**question**

is it better to take physics or chemistry if taking both whats better to take 1st in sophomore year better to take ap statistics or precalculas for becoming an architect
*Sunday, September 22, 2013 at 1:05pm*

**maths**

There are 4! ways to arrange m,a,t,h in the 1st 4 places. Of these, 3! have t as the last letter. The remaining letters are aaabhr, which can be arranged in 6!/3! ways. So, we have (4!-3!)(6!/3!) ways with t not in the 4th place. Add to that (3!)(6!/3! - 5!/3!) ways of having ...
*Friday, September 20, 2013 at 1:38pm*

**English writing a concluding paragraph**

I have to write from specific to general in my concluding paragraph and can't have any contractions, no 1st person or second person , no rhetorical questions , no in conclusion, in summary, etc
*Thursday, September 19, 2013 at 8:17pm*

**dma040**

42inch board is cut into 3peices. Peice 2 is twice as long as the 1st & 3rd peice. Peice 3 is three times as long as peice 1. What are the lengths of all 3 peices? Pc 1 Pc 2 Pc 3
*Monday, September 16, 2013 at 10:13am*

**Math **

Illustrate two real-life example of the fraction 0/6? I need help coming up with the second one. This is my 1st one "The amount of money of six business owners get if the business has a profit of $0."
*Sunday, September 15, 2013 at 11:18pm*

**English**

You can see that all start with "h" so separate them by the second letter in each. Among all those with "Ha" at the beginning, which will obviously be 3rd? Then "Hay" will come before "Haygarths ..." Do you understand why? Of the two &...
*Sunday, September 15, 2013 at 7:08am*

**dma 040**

42 inch board is cut into 3 pieces. Piece 2 is twice as long as the 1st & 3rd piece. Piece 3 is three times as long as piece 1. Find inches of all three pieces
*Saturday, September 14, 2013 at 10:42pm*

**pre-algebra**

There are 1,400 students in a school.The number of girls is 3/4 the number of boys.How many students are in the other grade levels if 1/6 of the girls and 1/5 of the boys in first grade?
*Thursday, September 12, 2013 at 9:18pm*

**math 5th grade**

Hunter school has a kindergarten and grades 1 through 6. there are 2 kindergarten and 2 classes in each grade. If the maximum class size is 25, what is the greatest number of students that could be in the school?
*Thursday, September 12, 2013 at 8:09pm*

**Math - Ratios**

In Mrs. Sotomayor's class, the final grade is based on 6 quizzes and 2 exams. If each exam counts for 3 times as much as each of the quizzes, what fraction of the final grade is determined by each exam?
*Tuesday, September 10, 2013 at 11:03pm*

**u.s. history**

well i was thinking about using some what along the lines of new inventions bring new era for the united state but my teacher said the paper has to be 5 paragraphs long with introduction 1st body(political changes)2nd body(economic changes,3rd body(social changes) and ...
*Monday, September 9, 2013 at 4:54pm*

**Money and Banking**

1. A firm uses capital to produce revenue. The marginal revenue from the first 5 units of capital is as follows: 1st unit has MR 2.30, 2nd unit has MR 1.9, 3rd unit has MR 1.70, 4th unit has MR 1.35, and 5th unit has MR 1.15. If the interest rate is 50%, what is the optimal ...
*Sunday, September 8, 2013 at 6:37pm*

**health 5 grade**

i need help in health subject for my son 5 grade Question 1- connect suppose you have a cold. this affects your physical health. does if affect your mental,emotional,family, and social health, too? explain why or why not. Question 2- practice healthful behaviors Make a list of...
*Friday, September 6, 2013 at 8:21pm*

**6th grade math**

They are all correct great job for not getting LCM and GCF mixed up! I used to get them mixed up all the time when I was in 6th grade.
*Wednesday, September 4, 2013 at 10:51pm*

**Math**

The fifth and sixth grades at Oak Street School are having fair.There are 50 students total and 3/5 of the students are fifth grade students.How many fifth grade students are entered in science fair?
*Wednesday, September 4, 2013 at 10:47pm*

**Math**

The fifth and sixth grades at Oak Street School are having fair.There are 50 students total and 3/5 of the students are fifth grade students.How many fifth grade students are entered in science fair?
*Wednesday, September 4, 2013 at 9:49pm*

**math**

The 1st 3 members of a team finished their laps with a mean time of 53 seconds. What mean time do the next 2 members will gine an overall team mean of 50 seconds?
*Tuesday, August 27, 2013 at 10:36pm*

**maths**

Calvin stays on the 7th floor in his building. Between each floor, there are exactly 12 stairs. If he starts from the 1st floor and climbs his way up to the 7th floor, how many stairs does he climb?
*Wednesday, August 21, 2013 at 11:07am*

**math help**

no; there are 4 choices for the 1st digit, then 3, then 2, so 4*3*2 = 24 Start with the greatest number of choices and work down. You don't have to end at 1. A 3-digit number using the digits 1,3,5,7,9 would have 5*4*3 = 60 ways.
*Tuesday, August 13, 2013 at 3:46am*

**math**

Ez stop fast gas sold 10957 worth of gasoline yesterday. Redular grade sold for 2.30 a gallon and premium grade sold for 2.55 a gallon. If the station sold 420 more regular than premium, how many gallons of regular were sold
*Monday, August 12, 2013 at 2:12am*

**statistics**

1. I took a sample of the grade point averages for students in my class. For 25 students, the standard deviation of grade points was 0.65 and the mean was 2.89. The standard error for the sample was:
*Sunday, August 11, 2013 at 2:58am*

**algebra**

let's eliminate the y's 1st times 7 --> 49x -63y = 91 2nd times 9 -> 81x + 63y = 819 add them: 130x = 910 x = 7 back into 2nd ... 9(7) + 7y = 91 7y = 28 y = 4 x=7 , y = 4
*Wednesday, August 7, 2013 at 10:27am*

**business math**

18. E-Z Stop Fast Gas sold $10,957 worth of gasoline yesterday. Regular grade sold for $2.30 a gallon and premium grade sold for $2.55 a gallon. If the station sold 420 more gallons of regular than of premium, how many gallons of regular were sold? (Points : 2)
*Thursday, August 1, 2013 at 4:25pm*

**physics**

The 1st ball h=v₀t₁+gt₁²/2 The 2nd ball x=v₀t₂ h = gt₂²/2 t₁<t₂
*Monday, July 29, 2013 at 5:52pm*

**Math**

1st one: 5u + 2v = 15 double the 2nd: 6u + 2v = -14 subtract them: -u = 29 u = -29 sub into 2nd: 3(-29) + v = -7 v= -7 + 87 = 80 u = -29 , v = 80
*Thursday, July 25, 2013 at 2:15pm*

**calculus**

I have reduced that to a trivial problem. The whole point of this problem is to find out how to solve it, not to get the correct answer, although I know that this is part of the Brilliant competition and the correct answer does matter here, which simply shows that this is a ...
*Sunday, July 21, 2013 at 7:11am*

**School**

I need to answer questions about school,(the topic I chose) but I don't get how to list the school options into my answers. It says: For this assignment, research school options available to you. List the top 10 schools from these options based upon your answers to the ...
*Tuesday, June 25, 2013 at 12:12pm*

**math**

Jane uses a jar to save her money. She saves $10 from her weekly allowance in the 1st week, $12 in the 2nd week, $14 in the 3rd week, and so on. How much money will she have saved in 10 weeks?
*Friday, June 21, 2013 at 9:33am*

**Calculus**

p(2) = 4a + 2b + c = 6 p'(x) = 2ax + b p'(2) = 4a + b = 2 ---> b = 2 - 4a b = 1 - 2a p''(x) = 2a = 3 a = 3/2 b = 2 - 4(3/2) = -4 in 1st equation: 4(3/2) - 8 + c = 6 c = 8
*Friday, June 14, 2013 at 8:44pm*

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