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

 Equations/511919: what is the step to solve -(-12)+(-11)-6-4-(-3)1 solutions Answer 342445 by rfer(12662)   on 2011-10-09 16:59:20 (Show Source): You can put this solution on YOUR website!use the order of operations +12-11-10+3=-6
 percentage/511797: Ned Conducted a survey with his classmates to find their preferences about three kinds of icecream. The circle graph below shows the results of his survey. -25 percent (vanilla) -33 percent (chocolate) -20 percent (strawberry) -22 percent (other) If 25 students prefer strawberry icecream, how many students are in Ned's class?1 solutions Answer 342422 by rfer(12662)   on 2011-10-09 14:37:36 (Show Source): You can put this solution on YOUR website!25/0.20=125 students
 test/511755: 4x2/51 solutions Answer 342420 by rfer(12662)   on 2011-10-09 14:34:03 (Show Source): You can put this solution on YOUR website!4/1*2/5=8/5=1 3/5
 Percentage-and-ratio-word-problems/511564: Whats the percent of 9 17/50 1 solutions Answer 342282 by rfer(12662)   on 2011-10-08 19:33:36 (Show Source): You can put this solution on YOUR website!(17/50)/(9/1)= 17/50*1/9=17/450=0.0378=3.78%
 Numeric_Fractions/511489: y=1/4(-8)-31 solutions Answer 342268 by rfer(12662)   on 2011-10-08 17:29:50 (Show Source): You can put this solution on YOUR website!y=-8/4-3 y=-2-3 y=-5
 Expressions-with-variables/511557: 10 total batteries used 6 volt and 12 volt batteries hooked in a series equal 84 volts. how many of each type of battery is used?1 solutions Answer 342266 by rfer(12662)   on 2011-10-08 17:26:59 (Show Source): You can put this solution on YOUR website!s+t=10 t=10-s -------------- 6s+12t=84 6s+12(10-s)=84 6s+120-12s=84 -6s=84-120 -6s=-36 s=6 six volt batteries t=10-6=4 tewelve volt batteries ------------------------------- 6*6+12*4=84 36+48=84
 Exponents-negative-and-fractional/511271: 17/511 solutions Answer 342126 by rfer(12662)   on 2011-10-07 22:01:04 (Show Source): You can put this solution on YOUR website!=1/3
 absolute-value/511288: what is the solution set x -6= 81 solutions Answer 342124 by rfer(12662)   on 2011-10-07 21:59:54 (Show Source): You can put this solution on YOUR website!x=14
 Travel_Word_Problems/511323: how long would it take to run a mile if you were travelling at a constant speed of 10 miles per hour?1 solutions Answer 342123 by rfer(12662)   on 2011-10-07 21:57:41 (Show Source): You can put this solution on YOUR website!60/10=6 minutes
 Polynomials-and-rational-expressions/511154: solve using addition and multiplication principle 2 + 7x < 23 1 solutions Answer 342084 by rfer(12662)   on 2011-10-07 17:54:24 (Show Source): You can put this solution on YOUR website!7x < 23-2 7x < 21 x < 21/7 x < 3
 Human-and-algebraic-language/511179: twenty is 22 less than six time a certain number?1 solutions Answer 342082 by rfer(12662)   on 2011-10-07 17:52:44 (Show Source): You can put this solution on YOUR website!20=6x-22 44=6x 44/6=x x=7.33
 Angles/511182: x+2x=1801 solutions Answer 342080 by rfer(12662)   on 2011-10-07 17:50:48 (Show Source): You can put this solution on YOUR website!3x=180 x=180/3 x=60
 Inequalities/511186: what is this question. 7w is greater than or equal to -51??1 solutions Answer 342079 by rfer(12662)   on 2011-10-07 17:49:02 (Show Source): You can put this solution on YOUR website!7w >= -51 w >= -51/7 w >= -7.28
 percentage/511221: What is the percentage of 375 over 10001 solutions Answer 342077 by rfer(12662)   on 2011-10-07 17:46:00 (Show Source): You can put this solution on YOUR website!375/1000=.375=37.5%
 Angles/511244: Angle A is half as large as it's complement angle B. Find the measurement of each angle1 solutions Answer 342076 by rfer(12662)   on 2011-10-07 17:43:49 (Show Source): You can put this solution on YOUR website!x+2x=90 3x=90 x=90/3 x=30 2x=60
 Equations/511248: 4p+6 if p=1 1/21 solutions Answer 342075 by rfer(12662)   on 2011-10-07 17:42:50 (Show Source): You can put this solution on YOUR website!4*1.5+6=12
 Angles/510908: the ? is: the measure of one angle is three times the measure of its complement. find the measure of each angle and this is all they give you.1 solutions Answer 341969 by rfer(12662)   on 2011-10-06 23:15:31 (Show Source): You can put this solution on YOUR website!x+3x=90 4x=90 x=22.5 3x=67.5
 Numbers_Word_Problems/510989: three more than twice a certain number is seven less than three times the number. find the number1 solutions Answer 341967 by rfer(12662)   on 2011-10-06 23:12:17 (Show Source): You can put this solution on YOUR website!2x+3=3x-7 2x-3x=-7-3 -x=-10 x=+10
 Money_Word_Problems/510987: Co. made an adjusting entry accruing interest for \$800 on a note payable for the month of January. The note required 12% per annum on the principal. The principal amount of the note payable must have been1 solutions Answer 341966 by rfer(12662)   on 2011-10-06 23:10:27 (Show Source): You can put this solution on YOUR website!0.12/12=0.01 800/0.01=\$80,000
 Circles/510913: 1 solutions Answer 341965 by rfer(12662)   on 2011-10-06 23:08:21 (Show Source): You can put this solution on YOUR website!3k-33 > 12 3k > 12+33 3k > 45 k > 45/3 k > 15
 Finance/510950: Find the slope of the line between (-4,5)and(7,8) im confused how to find the slope1 solutions Answer 341963 by rfer(12662)   on 2011-10-06 23:06:14 (Show Source): You can put this solution on YOUR website!slope m=(y1-y2)/(x1-x2) m=(8-5)/(7--4) m=3/11
 Linear-equations/510954: Find the slope of the line passing through the points (4,8) and (8,7).1 solutions Answer 341961 by rfer(12662)   on 2011-10-06 23:03:22 (Show Source): You can put this solution on YOUR website!slope m m=(7-8)/(8-4) m=-1/4 ---------------- y=mx+b 7=-1/4*8+b 7=-2+b 7+2=b b=9 ------------ y=-1/4x+9
 Linear-equations/510961: What slope-intercept equation represents a line that passes through the point (1,-5) and is parallel to the line y=-4x-5?1 solutions Answer 341960 by rfer(12662)   on 2011-10-06 23:00:21 (Show Source): You can put this solution on YOUR website!-5=-4*1+b -5=-4+b -5+4=b b=-1 ------- y=-4x-1
 Equations/510976: (3p-4)=311 solutions Answer 341959 by rfer(12662)   on 2011-10-06 22:58:47 (Show Source): You can put this solution on YOUR website!3p-4=31 3p=31+4 3p=35 p=35/3 p=11.7
 Travel_Word_Problems/510982: Could you please help me solve this: Paula leaves home driving 40 miles per hour. One hour later, her brother Dan leaves home, driving in the same direction as his sister at a speed of 50 miles per hour. How long does it take Dan to catch up to Paula? If you could please show all work so that I can understand. Thank you so much I need thhis as soon as possible.1 solutions Answer 341957 by rfer(12662)   on 2011-10-06 22:57:15 (Show Source): You can put this solution on YOUR website!40 mi lead overtake speed 50-40=10 mph 40/10=4 hrs
 Equations/510966: -5(x-3)=-251 solutions Answer 341956 by rfer(12662)   on 2011-10-06 22:55:19 (Show Source): You can put this solution on YOUR website!-5x+15=-25 -5x=-15-25 -5x=-40 x=-40/-5 x=+8
 Polygons/510901: write an equation for the line parallel to y=5x+4 passinng throught the origin1 solutions Answer 341910 by rfer(12662)   on 2011-10-06 21:09:48 (Show Source): You can put this solution on YOUR website!y=5x
 Inequalities/510846: 28=3m-7m1 solutions Answer 341908 by rfer(12662)   on 2011-10-06 21:08:55 (Show Source): You can put this solution on YOUR website!28=-4m 28/-4=m -7=m
 Inequalities/510898: I am having trouble with a homework problem and cannot figure it out. Could someone please help me to understand?? Thanks so much in advance. 4m over 5 < -3 over 15. 1 solutions Answer 341906 by rfer(12662)   on 2011-10-06 21:04:05 (Show Source): You can put this solution on YOUR website!4m/5 < -3/15 4m*15 < 5*-3 60m < -15 m < -15/60 m < -1/4
 test/510896: of 34 12 student have siblings what is the percentage of the students that have siblings 1 solutions Answer 341904 by rfer(12662)   on 2011-10-06 21:01:27 (Show Source): You can put this solution on YOUR website!12/34=0.35=35%
 Age_Word_Problems/510895: How old am I if 400 reduced by 3 times my age is 2231 solutions Answer 341903 by rfer(12662)   on 2011-10-06 21:00:14 (Show Source): You can put this solution on YOUR website!400-223=177 177/3=59 yrs