Questions on Algebra: Numeric Fractions answered by real tutors!

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Question 337420: I am so confused. I went to pre algebra in 7th and now im in algebra im in eighth grade. I forgot SOOOOOOO much from last year and we were just reviewing stuff for this first week of school. I dont know how to do anything. I have a quiz tomorrow and if i fail i get sent back to pre algebra... One of my questions are 2 1/2 + (- 3/4) Please help. I dont want to go back to pre algebra!

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Question 337490: A group of dogs and ducks have a total of 99 heads and legs among them. There are twice as many ducks as there are dogs. How many are there of each animal?
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Question 338145: convert to percent notation
0.4

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Question 338205: Simplify
-24xz/300xz
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Question 338214: Add the following. Do not use a number line except as a check.
-2/7+6/7=
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Question 338215: Collect like terms
3w+w+4/13w
Click here to see answer by katealdridge(100)

Question 338198: multiply
9/10(b-90)
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Question 338279: Write the decimal equalivalent, using the bar notation for 7/18? I am at a loss on this one.
Thank you
Sandy
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Question 338762: how many Olympic medals did the U.S. athletes win if U.S. had 14.34% of them in a a total of 252 Olympic medals?
Click here to see answer by unlockmath(1688)

Question 338895: a wheel made 528 revolutions at 65 and 2/5 revolutions per minute. how many minutes did the wheel rotate?
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Question 339110: multiply3x+4y-5zby x +y
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Question 339683: If n divided by m = 7/8, then what is m divided by n =. please show how u got the answer.
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Question 339753: What is 40 - 7/10?
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Question 339827: Nearly 4/9 of the Run for Peace participants were adults, 1/8 were children, 3/12 were teenagers, and the rest were senior citizens. What part of the the number of participants were not senior citizens?
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Question 339872: What is 2% of 16.8?

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Question 339918: Can you solve?
3/4(-12/5)
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Question 339918: Can you solve?
3/4(-12/5)
Click here to see answer by Fombitz(32388)

Question 339922: two thirds -one half times three fourths
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Question 339959: What is: x + three sevenths = four fifths?
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Question 339957: This question is "Least Common Multiple". I couldn't find a tab for it:
12=
35=
42=
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Question 339950: four and three eighths divided by one and three fourths?
Click here to see answer by Edwin McCravy(20054)

Question 339955: 9/4x=8
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Question 339964: What is four ninths of 684?
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Question 339964: What is four ninths of 684?
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Question 339964: What is four ninths of 684?
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Question 339953: four and four fifths + two and one third - three and eight fifteenths?
Click here to see answer by Edwin McCravy(20054)

Question 339962: Three of the adult participants ran the top three farthest distances. The first ran 9 1/2km, the second ran 8 1/5km, and the last one ran 8 1/7km. Find the total number of kilometers they ran altogether.
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Question 339967: What is: six and four fifths * two and one half divided by two and three eighths?
Click here to see answer by Edwin McCravy(20054)

Question 339944: six and four fifths* two and one half divided by two and three eighths.
Click here to see answer by rfer(16322)

Question 340148: 6 3/4 x 5 1/3=
dont know how to solve?
Click here to see answer by stanbon(75887)

Question 340148: 6 3/4 x 5 1/3=
dont know how to solve?
Click here to see answer by rfer(16322)

Question 340355: This is a question about "Scientific Notation" I couldn't find a tab for it!
Write 0.000036 in scientific notation?
Write 4.78 times 10 to the power of eight in standard notation?
Click here to see answer by nerdybill(7384)

Question 340340: What is: 2 1/6 divided by 3 1/3 times 6 1/4 divided by 4 1/3?
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Question 340335: What is: x + 2 2/3 = 5 1/4?
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Question 340333: What is: 3/5x = 48?
Click here to see answer by Fombitz(32388)

Question 340346: What is: 4 2/3 - 7/15 + 3 4/5?
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Question 340341: What is: 1/2(5/6-2/3) + 3/8?
Click here to see answer by rfer(16322)

Question 340343: What is: 0.12 of what number is 72?
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Question 341204: 1 1 1
- = - + -
y 56.1 15.3

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Question 341144: How do you solve a division question with fractions when one of the fractions is a negitive mixed number?
Click here to see answer by edjones(8007)

Question 341248: 2/3-____=1
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Question 341152: Chris bought 1 and 3/4 pounds of nuts. Two-thirds of this amount was used at a dinner party. How many pounds of nuts were used?
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Question 341377: What number is 4/7 of 84?
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Question 341386: What is x-3/4 = 4/5?
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Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900