Algebra ->  Tutoring on algebra.com -> See tutors' answers!      Log On

 Tutoring Home For Students Tools for Tutors Our Tutors Register Recently Solved
 By Tutor
| By Problem Number |

Tutor:

# Recent problems solved by 'edjones'

Jump to solutions: 0..29 , 30..59 , 60..89 , 90..119 , 120..149 , 150..179 , 180..209 , 210..239 , 240..269 , 270..299 , 300..329 , 330..359 , 360..389 , 390..419 , 420..449 , 450..479 , 480..509 , 510..539 , 540..569 , 570..599 , 600..629 , 630..659 , 660..689 , 690..719 , 720..749 , 750..779 , 780..809 , 810..839 , 840..869 , 870..899 , 900..929 , 930..959 , 960..989 , 990..1019 , 1020..1049 , 1050..1079 , 1080..1109 , 1110..1139 , 1140..1169 , 1170..1199 , 1200..1229 , 1230..1259 , 1260..1289 , 1290..1319 , 1320..1349 , 1350..1379 , 1380..1409 , 1410..1439 , 1440..1469 , 1470..1499 , 1500..1529 , 1530..1559 , 1560..1589 , 1590..1619 , 1620..1649 , 1650..1679 , 1680..1709 , 1710..1739 , 1740..1769 , 1770..1799 , 1800..1829 , 1830..1859 , 1860..1889 , 1890..1919 , 1920..1949 , 1950..1979 , 1980..2009 , 2010..2039 , 2040..2069 , 2070..2099 , 2100..2129 , 2130..2159 , 2160..2189 , 2190..2219 , 2220..2249 , 2250..2279 , 2280..2309 , 2310..2339 , 2340..2369 , 2370..2399 , 2400..2429 , 2430..2459 , 2460..2489 , 2490..2519 , 2520..2549 , 2550..2579 , 2580..2609 , 2610..2639 , 2640..2669 , 2670..2699 , 2700..2729 , 2730..2759 , 2760..2789 , 2790..2819 , 2820..2849 , 2850..2879 , 2880..2909 , 2910..2939 , 2940..2969 , 2970..2999 , 3000..3029 , 3030..3059 , 3060..3089 , 3090..3119 , 3120..3149 , 3150..3179 , 3180..3209 , 3210..3239 , 3240..3269 , 3270..3299 , 3300..3329 , 3330..3359 , 3360..3389 , 3390..3419 , 3420..3449 , 3450..3479 , 3480..3509 , 3510..3539 , 3540..3569 , 3570..3599 , 3600..3629 , 3630..3659 , 3660..3689 , 3690..3719 , 3720..3749 , 3750..3779 , 3780..3809 , 3810..3839 , 3840..3869 , 3870..3899 , 3900..3929 , 3930..3959 , 3960..3989 , 3990..4019 , 4020..4049 , 4050..4079 , 4080..4109 , 4110..4139 , 4140..4169 , 4170..4199 , 4200..4229 , 4230..4259 , 4260..4289 , 4290..4319 , 4320..4349 , 4350..4379 , 4380..4409 , 4410..4439 , 4440..4469 , 4470..4499 , 4500..4529 , 4530..4559 , 4560..4589 , 4590..4619 , 4620..4649 , 4650..4679 , 4680..4709 , 4710..4739 , 4740..4769 , 4770..4799 , 4800..4829 , 4830..4859 , 4860..4889 , 4890..4919 , 4920..4949 , 4950..4979 , 4980..5009 , 5010..5039 , 5040..5069 , 5070..5099 , 5100..5129 , 5130..5159 , 5160..5189 , 5190..5219 , 5220..5249 , 5250..5279 , 5280..5309 , 5310..5339 , 5340..5369 , 5370..5399 , 5400..5429 , 5430..5459 , 5460..5489 , 5490..5519 , 5520..5549 , 5550..5579 , 5580..5609 , 5610..5639 , 5640..5669 , 5670..5699 , 5700..5729 , 5730..5759 , 5760..5789 , 5790..5819 , 5820..5849 , 5850..5879 , 5880..5909 , 5910..5939 , 5940..5969 , 5970..5999 , 6000..6029 , 6030..6059 , 6060..6089 , 6090..6119 , 6120..6149 , 6150..6179 , 6180..6209 , 6210..6239 , 6240..6269 , 6270..6299 , 6300..6329 , 6330..6359 , 6360..6389 , 6390..6419 , 6420..6449 , 6450..6479 , 6480..6509 , 6510..6539 , 6540..6569 , 6570..6599 , 6600..6629 , 6630..6659 , 6660..6689 , 6690..6719 , 6720..6749 , 6750..6779 , 6780..6809 , 6810..6839 , 6840..6869 , 6870..6899 , 6900..6929 , 6930..6959 , 6960..6989 , 6990..7019 , 7020..7049 , 7050..7079 , 7080..7109 , 7110..7139 , 7140..7169 , 7170..7199 , 7200..7229 , 7230..7259 , 7260..7289 , 7290..7319 , 7320..7349 , 7350..7379 , 7380..7409 , 7410..7439 , 7440..7469 , 7470..7499 , 7500..7529 , 7530..7559 , 7560..7589 , 7590..7619 , 7620..7649 , 7650..7679 , 7680..7709 , 7710..7739 , 7740..7769 , 7770..7799, >>Next

 Permutations/589615: Question 1. Joyce is picking out material for her new quilt; she needs 11 different fabrics. At the fabric store, there are 7 solids, 6 striped prints, 4 plaids, and 4 floral prints that she can choose from. How many different ways can she choose the fabrics if she wants all 7 solids? Question 2. Raul wants to custom order 4 collars for his 4 unique dogs. A custom ordered is tailor fitted to a pet and comes in a choice of 5 different colors. How many selections of collars for the 4 dogs are possible if repetitions of colors are allowed? How many selections of collars are possible if repetitions of colors are not allowed? 1 solutions Answer 374923 by edjones(7794)   on 2012-03-21 01:06:05 (Show Source): You can put this solution on YOUR website!1) 6+4+4=14 fabrics to choose from other than solids. 11-7=4 Remaining after the 7 solids are removed. 14C4=1001 ways. . Ed
 Permutations/589622: How many combination of three numbers there are in 1-20 numbers? 1 solutions Answer 374922 by edjones(7794)   on 2012-03-21 00:55:31 (Show Source): You can put this solution on YOUR website!20C3=20!/(17!*3!)=1140 . Ed
 Probability-and-statistics/589645: cara has 15 crayons, 5 red,5 blue,5 yellow.if she takes 2 crayons out, what is the probability she will choose one red and one yellow?1 solutions Answer 374921 by edjones(7794)   on 2012-03-21 00:51:44 (Show Source): You can put this solution on YOUR website!Combination=nCr=n!/((n-r)!*r!) (5C1)(5C1)/15C2 =25/105 =5/21 probability she will choose one red and one yellow. . Ed
 Numeric_Fractions/589642: what is 7 tenths of 30 1 solutions Answer 374920 by edjones(7794)   on 2012-03-21 00:43:53 (Show Source): You can put this solution on YOUR website!30 * 7/10 = 210/10 = 21
 Quadratic_Equations/589637: Solve: x+2√(x-8)=0 Possible answers are- a. 4,16 b.-4,2 c.4 d.161 solutions Answer 374918 by edjones(7794)   on 2012-03-21 00:40:42 (Show Source): You can put this solution on YOUR website! x+2√(x-8)=0 x=-2√(x-8) x^2=4(x-8) x^2=4x-32 x^2-4x+30=0 The answer is in complex numbers and none of the 4 choices is correct.
 Probability-and-statistics/589617: You have an equally likely chance of choosing any integer from 1 to 25. -what is the chance that a multiple of 2 or 3 is chosen?1 solutions Answer 374915 by edjones(7794)   on 2012-03-21 00:16:31 (Show Source): You can put this solution on YOUR website!24/2=12 multiples of two 24/3=8 multiples of three but half of them are multiples of two and must be eliminated. 12+4=16 16/25 the chance that a multiple of 2 or 3 is chosen. . Ed
 Quadratic_Equations/589626: the discriminant in the quadratic formula is the expression ____.1 solutions Answer 374914 by edjones(7794)   on 2012-03-21 00:06:09 (Show Source): You can put this solution on YOUR website!b^2-4ac
 Probability-and-statistics/588951: Suppose that, for students who are enrolled in college algebra, 71 percent are freshmen, 40 percent are female, and 25 percent are female and are freshmen. Your answers below should be entered as decimals and rounded to three decimal places. (a) One student will be selected at random. What is the probability that the selected student will be a freshman or female (or both)? (b) One student will be selected at random. What is the probability that the selected student will not be a freshman? I have no idea on how to solve these.1 solutions Answer 374701 by edjones(7794)   on 2012-03-19 20:05:38 (Show Source): You can put this solution on YOUR website!Easy when you construct a Venn diagram. Murder otherwise! a).46+.25+.15=.86 (So .25 is the intersection of the two circles and .86 is the union of the two circles) . b)1-.71=.29 . Ed
 Probability-and-statistics/588954: A poker hand, consisting of 7 cards, is dealt from a standard deck of 52 cards. Find the probability that the hand contains 7 cards of the same suit.1 solutions Answer 374694 by edjones(7794)   on 2012-03-19 19:49:39 (Show Source): You can put this solution on YOUR website!4(13C7)/52C7 The 4 is for 4 suits. =5.13 * 10^-5 the probability that the hand contains 7 cards of the same suit. . Ed
 Human-and-algebraic-language/588901: The sum of two real numbers is -6. Calculate their values if their product is a maximum. 1 solutions Answer 374682 by edjones(7794)   on 2012-03-19 19:25:00 (Show Source): You can put this solution on YOUR website!x+y=-6 y=-6-x (x(-6-x)=0 -x^2-6x=0 Max at x = -b/2a =-(-6)/-2 =-3 Max at y: -(-3^2)-6(-3) -9+18 =9 . Ed .
 Probability-and-statistics/588913: a marble is selected at random from a jar containing 5 red marbles, 3 yellow marbles, and 4 green marbles. what are the odds in favor of selecting a red marble?1 solutions Answer 374674 by edjones(7794)   on 2012-03-19 18:42:53 (Show Source): You can put this solution on YOUR website!5+3+4=12 5/12 12-5=7 5 to 7 the odds in favor of selecting a red marble. . Ed
 Probability-and-statistics/588818: A committee of ten people must be selected froma group containing 8 males and 9 females. What is the probability that the committee will have more females than males.1 solutions Answer 374650 by edjones(7794)   on 2012-03-19 17:14:34 (Show Source): You can put this solution on YOUR website!9F+1M = (9C9)(8C1)=8 8F+2M = (9C8)(8C2)=252 7F+3M = (9C7)(8C3)=2016 6F+4M = (9C6)(8C4)=5880 -----------------------------Add ===================>8156 . . 8156/17C10 = .4194 . Ed
 Permutations/588845: How many premutations of three items can be selected from a group of six? Use the letters A, B, C, D, E, and F to identify the items, and list each of the permutations of items B, D, and F. 1 solutions Answer 374642 by edjones(7794)   on 2012-03-19 16:59:15 (Show Source): You can put this solution on YOUR website!nPr = n!/(n-r)! 6!/(6-3)! =6*5*4*3!/3! =6*5*4 =120 . BDF, BFD, DBF, DFB, FDB, FBD . Ed
 Travel_Word_Problems/588844: john runs 8/10 miles every day. how many miles does he run in 30 days 1 solutions Answer 374640 by edjones(7794)   on 2012-03-19 16:54:41 (Show Source): You can put this solution on YOUR website!8/10 * 30 =240/10 =24 miles . Ed
 Probability-and-statistics/588838: A box contains 2 one-dollar bills, 1 five-dollar bill, and 1 ten-dollar bill. A player blindly and randomly draws bills one at a time without replacement from the box until a ten-dollar bill is drawn. Then the game stops. All bills drawn are kept by the player. What is the probability of winning exactly \$16? 1 solutions Answer 374639 by edjones(7794)   on 2012-03-19 16:52:13 (Show Source): You can put this solution on YOUR website!A \$1 bill must remain in the box to have exactly \$16 and the last bill taken must be the \$10. Probability that the last bill is a \$1 on a random draw is 2/4=1/2 Of the 1/2 when this occurs the probability that the third bill taken is the \$10 is 1/3. 1/2 * 1/3 = 1/6 the probability of winning exactly \$16. . Ed
 real-numbers/588836: suck my dick!:D1 solutions Answer 374635 by edjones(7794)   on 2012-03-19 16:29:58 (Show Source): You can put this solution on YOUR website!Inappropriate.
 Probability-and-statistics/588759: What are the solutions: After several rounds of a card game, a deck of playing cards contains, 10 red-suited cards and 15 black-suited cards. Terry draws cards from this deck without replacement until she has either two red cards or two black cards. To the nearest tenth of a percent, what is the probability that Terry draws two red cards?1 solutions Answer 374634 by edjones(7794)   on 2012-03-19 16:27:23 (Show Source): You can put this solution on YOUR website!(10C2)/25C2=45/300=0.15 Probability that the first 2 cards are red. (15C2)/25C2=105/300=0.35 Probability that the first 2 cards are black. 1.00-.35-.15=.50 probability one card is red and the other black after two cards are drawn. 10/25 * .50 = .20 probability one card is red and the other black after two cards are drawn AND the card drawn is red. .15 + .20 = .35 the probability that Terry draws two red cards. . Ed
 test/588791: The answer is supposed to be t=rs over q-r. I can't seem to find a way to do it. Help! 1 solutions Answer 374627 by edjones(7794)   on 2012-03-19 15:49:27 (Show Source): You can put this solution on YOUR website!What's the question?
 Average/588771: What is the z score for each number: 50,75,75,1001 solutions Answer 374625 by edjones(7794)   on 2012-03-19 15:47:36 (Show Source): You can put this solution on YOUR website!M=(50+75+75+100)/4=75 v=((50-75)^2+(75-75)^2*2+(100-75)^2)/3 = 1250/3 sqrt(v)=s=20.41 z=(x-m)/s z[50]=-25/20.41 = -1.22 z[75]=0 z[100]=25/20.41 = 1.22 . Ed
 Probability-and-statistics/588430: three cards are drawn from a well shuffled deck. what is the probability that : a) all are black ? b) exactly one is a diamond ? c) all are hearts ?1 solutions Answer 374519 by edjones(7794)   on 2012-03-18 20:31:14 (Show Source): You can put this solution on YOUR website!Assuming the deck has 52 cards. Combination=nCr=n!/((n-r!)*r!) a) 26 cards are black (26C3)/(52C3) = 2/17 . b) 13 cards are diamonds and 39 cards are non diamonds. ((13C1)(39C2))/52C3 = 741/1700 . c) 13C3/52C3 = 11/850 . Ed
 Travel_Word_Problems/588463: In how many minutes after five o'clock be the hands of the clock be in opposite direction for the first time? show the solution.1 solutions Answer 374512 by edjones(7794)   on 2012-03-18 19:54:58 (Show Source): You can put this solution on YOUR website!60 minutes.
 Exponential-and-logarithmic-functions/587537: solve for x 4e^2x = 141 solutions Answer 374157 by edjones(7794)   on 2012-03-15 20:54:02 (Show Source): You can put this solution on YOUR website!4e^2x = 14 e^(2x)=7/2 ln(e^(2x))=ln(7/2) 2x=ln(7/2) x=ln(7/2)/2 . Ed
 Probability-and-statistics/587506: I need help getting this problem started and i am stuck.. Please help.. 3 out of every 50 bottles will ferment. You are sending shipments of 20 bottles. What is the probability that none of the bottles in a batch will ferment?1 solutions Answer 374156 by edjones(7794)   on 2012-03-15 20:37:32 (Show Source): You can put this solution on YOUR website!47 of 50 = .94 will not ferment. .94^20=.29 probability that none will ferment. . Ed
 Probability-and-statistics/587123: A card is drawn from a regular deck of 52 cards. Let A be the event "the card is a club" Let B be the event "the card is red" Let C be the event "the card is a six" a- Find P(A), The probability that the card drawn is a club. b-Using vocabulary of the cards, such as in the definitions of the events, write in words the meaning of the event A "FLIPPED U" C (A and C) and find P(A "FLIPPED U" C). ["FLIPPED U" is the symbol for intersection] c- Using the vocabulary of the cards, write in words the meaning of the event B U C, (B or C) and find P(B U C). [U is the symbol for union]1 solutions Answer 374013 by edjones(7794)   on 2012-03-15 00:55:26 (Show Source): You can put this solution on YOUR website!a) 13/52 . b) 1/52 the six of clubs. . c) 28/52 = 7/13 Twenty six red cards + two black sixes. . Ed
 Probability-and-statistics/587093: An electric clock is stopped by a power failure. What is the probability that the second hand is stopped between the marks for the 3 and the 4. ( Assume that the second hand moves smoothly around the click, not jumping from mark to mark)1 solutions Answer 374011 by edjones(7794)   on 2012-03-15 00:42:05 (Show Source): You can put this solution on YOUR website!The distance between any 2 consecutive numbers on a clock is 1/12 of the circumference. 1/12 the probability that the second hand is stopped between the marks for the 3 and the 4. . Ed
 Probability-and-statistics/587094: A box contains 5 colored balls and 4 white balls. If three balls are drawn one by one, find the probability that they are all white if the draws are made as follows: A- with replacement B- without replacement1 solutions Answer 374010 by edjones(7794)   on 2012-03-15 00:38:42 (Show Source): You can put this solution on YOUR website!5+4=9 . A) (4/9)^3=64/729 . B) 4/9 * 3/8 * 2/7 = 1/21 . Ed
 Probability-and-statistics/587136: A box contains 5 white balls, 3 black balls, and 2 red balls. A-What is the probability of drawing a white ball? B- How many white balls must be added to the box so that the probability of drawing a white ball is 3/4? C-How many black balls must be added to the original assortment so that the probability of drawing a white ball is 1/4? Please help me with this!1 solutions Answer 374009 by edjones(7794)   on 2012-03-15 00:31:20 (Show Source): You can put this solution on YOUR website!A) 5+3+2=10 5/10 = 1/2 the probability of drawing a white ball. . B) (5+x)/(10+x) = 3/4 5+x = 3(10+x)/4 5+x=(30+3x)/4 20+4x=30+3x x=10 white balls must be added to the box so that the probability of drawing a white ball is 3/4 . C) Similar to B . Ed
 Probability-and-statistics/587144: a four-sided fair die has faces labeled 1,2,3, and 4. what is the probability of rolling a sum of 8 with a toss of 2 such dice? 1 solutions Answer 374006 by edjones(7794)   on 2012-03-15 00:16:54 (Show Source): You can put this solution on YOUR website!4 + 4 Is the only sum of 8. 1/4^2 = 1/16 the probability of rolling a sum of 8 with a toss of 2 such dice. . Ed
 Triangles/587156: If AB=10 ,BC=9 and CA=11 what is the largest andle of triangle ABC? 1 solutions Answer 374005 by edjones(7794)   on 2012-03-15 00:12:17 (Show Source):
 Probability-and-statistics/587146: a bag contains 5 red marbles and 10 blue marbles. what is the probability that the two marbles drawn from the bag (randomly without replacement) will both be blue? 1 solutions Answer 374004 by edjones(7794)   on 2012-03-15 00:11:33 (Show Source): You can put this solution on YOUR website!5+10=15 10/15 * 9/14 = 90/210 = 3/7 . Ed
 Square-cubic-other-roots/587160: 10m^3+4m1 solutions Answer 374003 by edjones(7794)   on 2012-03-15 00:08:50 (Show Source): You can put this solution on YOUR website!10m^3+4m =2m(5m^2+2)