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 'rfer'

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 , 7800..7829 , 7830..7859 , 7860..7889 , 7890..7919 , 7920..7949 , 7950..7979 , 7980..8009 , 8010..8039 , 8040..8069 , 8070..8099 , 8100..8129 , 8130..8159 , 8160..8189 , 8190..8219 , 8220..8249 , 8250..8279 , 8280..8309 , 8310..8339 , 8340..8369 , 8370..8399 , 8400..8429 , 8430..8459 , 8460..8489 , 8490..8519 , 8520..8549 , 8550..8579 , 8580..8609 , 8610..8639 , 8640..8669 , 8670..8699 , 8700..8729 , 8730..8759 , 8760..8789 , 8790..8819 , 8820..8849 , 8850..8879 , 8880..8909 , 8910..8939 , 8940..8969 , 8970..8999 , 9000..9029 , 9030..9059 , 9060..9089 , 9090..9119 , 9120..9149 , 9150..9179 , 9180..9209 , 9210..9239 , 9240..9269 , 9270..9299 , 9300..9329 , 9330..9359 , 9360..9389 , 9390..9419 , 9420..9449 , 9450..9479 , 9480..9509 , 9510..9539 , 9540..9569 , 9570..9599 , 9600..9629 , 9630..9659 , 9660..9689 , 9690..9719 , 9720..9749 , 9750..9779 , 9780..9809 , 9810..9839 , 9840..9869 , 9870..9899 , 9900..9929 , 9930..9959 , 9960..9989 , 9990..10019 , 10020..10049 , 10050..10079 , 10080..10109 , 10110..10139 , 10140..10169 , 10170..10199 , 10200..10229 , 10230..10259 , 10260..10289 , 10290..10319 , 10320..10349 , 10350..10379 , 10380..10409 , 10410..10439 , 10440..10469 , 10470..10499 , 10500..10529 , 10530..10559 , 10560..10589 , 10590..10619 , 10620..10649 , 10650..10679 , 10680..10709 , 10710..10739 , 10740..10769 , 10770..10799 , 10800..10829 , 10830..10859 , 10860..10889 , 10890..10919 , 10920..10949 , 10950..10979 , 10980..11009 , 11010..11039 , 11040..11069 , 11070..11099 , 11100..11129 , 11130..11159 , 11160..11189 , 11190..11219 , 11220..11249 , 11250..11279 , 11280..11309 , 11310..11339 , 11340..11369 , 11370..11399 , 11400..11429 , 11430..11459 , 11460..11489 , 11490..11519 , 11520..11549 , 11550..11579 , 11580..11609 , 11610..11639 , 11640..11669 , 11670..11699 , 11700..11729 , 11730..11759 , 11760..11789 , 11790..11819 , 11820..11849 , 11850..11879 , 11880..11909 , 11910..11939 , 11940..11969 , 11970..11999 , 12000..12029 , 12030..12059 , 12060..12089 , 12090..12119 , 12120..12149 , 12150..12179 , 12180..12209 , 12210..12239 , 12240..12269 , 12270..12299 , 12300..12329 , 12330..12359 , 12360..12389 , 12390..12419 , 12420..12449 , 12450..12479 , 12480..12509 , 12510..12539 , 12540..12569 , 12570..12599 , 12600..12629 , 12630..12659, >>Next

 Percentage-and-ratio-word-problems/694010: what percent of 770 is 1260 1 solutions Answer 427710 by rfer(12655)   on 2012-12-13 18:13:52 (Show Source): You can put this solution on YOUR website!1260/770=1.64=164%
 Average/693983: Hello! I'm stuck on this problem and think I'm doing it wrong. Any help? 3v-7+2v = 5v + 9 I keep getting the answer 16.. Am I incorrect? 1 solutions Answer 427697 by rfer(12655)   on 2012-12-13 17:19:59 (Show Source): You can put this solution on YOUR website!The V's cancel so there is no solution.
 Average/694022: maurice has score of 88,90, and 80 on three test.what score must he make in his next test to have a mean score of exactly 85?1 solutions Answer 427696 by rfer(12655)   on 2012-12-13 17:16:25 (Show Source): You can put this solution on YOUR website!(88+90+80+x)/4=85 258+x=85*4 x=340-258 x=82
 expressions/694027: 0.4x – 0.2(3 – x) – 1.8 With the written out steps thanks1 solutions Answer 427694 by rfer(12655)   on 2012-12-13 17:12:24 (Show Source): You can put this solution on YOUR website!0.4x-0.6+0.2x-1.8= 0.6x-2.4
 Money_Word_Problems/694020: what woul 3.5% be as a decimal1 solutions Answer 427692 by rfer(12655)   on 2012-12-13 17:09:47 (Show Source): You can put this solution on YOUR website!0.035
 Money_Word_Problems/693769: What is the principal if the interest is \$1,840 (8% for 10 years) I = \$1840 P = r = 8% t = 10 1 solutions Answer 427534 by rfer(12655)   on 2012-12-12 22:42:43 (Show Source): You can put this solution on YOUR website!(1.08)^10=2.15892 1840/2.15892=\$852.28
 Miscellaneous_Word_Problems/693697: amanda can type 7 words in 6 seconds at this rate, how many words can she type in 3 minutes 1 solutions Answer 427532 by rfer(12655)   on 2012-12-12 22:37:33 (Show Source): You can put this solution on YOUR website!7*10*3=210
 Money_Word_Problems/693726: A shirt cost 119.99 and the store has a 30% off sale. How much will you pay for the shirt after the 7.7 sales tax1 solutions Answer 427531 by rfer(12655)   on 2012-12-12 22:34:16 (Show Source): You can put this solution on YOUR website!(119.99*0.70)*1.077=\$90.46
 Money_Word_Problems/693722: What is 60% more of 400\$1 solutions Answer 427530 by rfer(12655)   on 2012-12-12 22:31:23 (Show Source): You can put this solution on YOUR website!400*1.60=\$640 The dollar sign goes first.
 Exponents-negative-and-fractional/693767: please help me on this equation: negative four and three fourths plus three and three fifths x = 13 and one fourth -4 3/4 + 3 3/5 x = 13 1/4 thank you1 solutions Answer 427529 by rfer(12655)   on 2012-12-12 22:27:55 (Show Source): You can put this solution on YOUR website!-19/4+18/5x=53/4 18/5x=53/4+19/4 18/5x=72/4 x=(72/4)/(18/5) x=72/4*5/18 x=4/4*5/1 x=1*5 x=5
 Money_Word_Problems/693736: What is 4% of 10401 solutions Answer 427528 by rfer(12655)   on 2012-12-12 22:24:01 (Show Source): You can put this solution on YOUR website!1040*0.04=61.6
 Average/693763: A test has 75 questions and you answered 16% of them incorrectly. How many questions did you miss?1 solutions Answer 427527 by rfer(12655)   on 2012-12-12 22:22:00 (Show Source): You can put this solution on YOUR website!75*0.16=12
 Average/693591: Average of 95 95 85 and 831 solutions Answer 427463 by rfer(12655)   on 2012-12-12 17:38:29 (Show Source): You can put this solution on YOUR website!358/4=89.5
 Equations/693572: What is the answer for (-m+9)(-3)? I am trying to help my 12 year old daughter with her math. Yikes.1 solutions Answer 427462 by rfer(12655)   on 2012-12-12 17:37:09 (Show Source): You can put this solution on YOUR website!(-m+9)(-3)=+3m-27
 Triangles/693577: The first angle of a triangle is 15 degrees less than twice the third angle. The second angle is 25 degrees more than the third angle. what are the angles of the triangle?1 solutions Answer 427460 by rfer(12655)   on 2012-12-12 17:35:46 (Show Source): You can put this solution on YOUR website!a1=2x-15 a2=x+25 a3=x 2x-15+x+25+x=180 4x=180-10 4x=170 x=170/4 x=42.5 2x-15=70 x+25=67.5
 Money_Word_Problems/693085: George makes \$11.83 per hour. If he receievs a 12.6% increase in his hourly wage, what will his new wage be?1 solutions Answer 427288 by rfer(12655)   on 2012-12-11 20:37:11 (Show Source): You can put this solution on YOUR website!11.83*1.126=\$13.32
 Equations/693153: -(-3)1 solutions Answer 427286 by rfer(12655)   on 2012-12-11 20:35:33 (Show Source): You can put this solution on YOUR website!=+3
 Graphs/693145: Find in each case the number or numbers that can replace k so that the resulting ordered number pair will be on the graph in the given equation. x + 2y = 5;(k,2) x + 3y = 10;(13,k) x - y = 0;(k,k) x + y = k;(2,5) Thank you so much for you help! 1 solutions Answer 427285 by rfer(12655)   on 2012-12-11 20:35:09 (Show Source): You can put this solution on YOUR website!A) x+3*2=5 x+6=5 x=5-6 x=-1 (-1,2) B) 13+3y=10 3y=10-13 3y=-3 y=-3/3 y=-1 (13,-11)
 Linear-equations/693048: Convert y-11=3(x-2) into standard form 1 solutions Answer 427232 by rfer(12655)   on 2012-12-11 18:23:02 (Show Source): You can put this solution on YOUR website!y-11=3x-6 -3x+y=-6+11 -3x+y=5 3x-y=-5
 Angles/693041: Two angles are supplementary. The Larger angle is 20 degrees less than three times the smaller angle. Find the measure of each angle1 solutions Answer 427230 by rfer(12655)   on 2012-12-11 18:20:53 (Show Source): You can put this solution on YOUR website!3x-20+x=180 4x=180+20 4c=200 x=50 3x-20=130
 Graphs/693053: It says... find the slope of the line that passes through the pair of points...(-3,-2), (5,4)....1 solutions Answer 427229 by rfer(12655)   on 2012-12-11 18:18:24 (Show Source): You can put this solution on YOUR website!slope m=(4--2)/(5--3) m=6/8 m=3/4
 Travel_Word_Problems/692885: A car travels at 55km/h: how far can it travel In 4hrs 1 solutions Answer 427130 by rfer(12655)   on 2012-12-11 13:49:45 (Show Source): You can put this solution on YOUR website!55*4=220km
 Linear-equations/692858: How do you write an equation of the line that passes through the point (4, 7) and is parallel to the line y = 0.5x – 11 solutions Answer 427120 by rfer(12655)   on 2012-12-11 12:18:43 (Show Source): You can put this solution on YOUR website!7=0.5*4+b 7-2=b b=5 -------------- y=0.5x+5
 decimal-numbers/692529: write in standard form 6.793*10 to the 6th power 1 solutions Answer 427044 by rfer(12655)   on 2012-12-10 18:56:07 (Show Source): You can put this solution on YOUR website!=6,793,000
 expressions/692502: Factor: 2x^2-11x+151 solutions Answer 427023 by rfer(12655)   on 2012-12-10 17:27:58 (Show Source): You can put this solution on YOUR website!(-2x+5)(-x+3)
 Linear-equations/692503: Write the equation of a line which passes through the y-axis at 7 and has a slope of 101 solutions Answer 427021 by rfer(12655)   on 2012-12-10 17:25:27 (Show Source): You can put this solution on YOUR website!y=10x+7
 Rectangles/692448: The length and width of a rectangle are in the ratio of 5:3 The perimeter is 64 feet. Find the length and width of the rectangle 1 solutions Answer 427019 by rfer(12655)   on 2012-12-10 17:24:42 (Show Source): You can put this solution on YOUR website!2(5x)+2(3x)=64 10x+6x=64 16x=84 x=64/16 x=4 5x=20ft lenght 3x=12 width
 Percentage-and-ratio-word-problems/692452: anthony paid a 20% tip on a \$15 bill. what ws the total amount anthony paid on the bill1 solutions Answer 427017 by rfer(12655)   on 2012-12-10 17:21:54 (Show Source): You can put this solution on YOUR website!15*1.15=\$17.25
 Equations/692466: What is a number such that eight less than twice the number is 32.1 solutions Answer 427016 by rfer(12655)   on 2012-12-10 17:20:26 (Show Source): You can put this solution on YOUR website!2x-8=32 2x=40 x=40/2 x=20
 Inequalities/692489: -8 ≤ 8m + 28 My son says the answer should be a whole number. can not figure it out.1 solutions Answer 427013 by rfer(12655)   on 2012-12-10 17:17:08 (Show Source): You can put this solution on YOUR website!-8 =< 8m+28 -8-28 =< 8m -36 => 8m -36/8 => m -4.5 => m I'm with you.
 Average/692324: X-2/3=3/41 solutions Answer 426972 by rfer(12655)   on 2012-12-10 12:55:37 (Show Source): You can put this solution on YOUR website!x=3/4+2/3 x=9/12+8/12 x=17/12 x=1 5/12