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# Recent problems solved by 'rfer'

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 Travel_Word_Problems/405696: How long does it take to travel .2 miles at 35 miles per hour?1 solutions Answer 286505 by rfer(12644)   on 2011-02-07 17:52:17 (Show Source): You can put this solution on YOUR website!.2/35=0.0057 hrs
 Travel_Word_Problems/405552: Two trains leave stations 374 miles apart at the same time and travel toward each other. One train travels at 80 miles per hour while the other travels at 90 miles per hour. How long will it take for the two trains to meet?1 solutions Answer 286445 by rfer(12644)   on 2011-02-07 13:35:35 (Show Source): You can put this solution on YOUR website!170 mph approach speed 374/170=2.2 hrs = 2 hrs 12 min
 test/405554: Two less then twice a number equals the number plus 12. What is the number?1 solutions Answer 286444 by rfer(12644)   on 2011-02-07 13:33:48 (Show Source): You can put this solution on YOUR website!2x-2=x+12 x=14 ---------- 2*14-2=x+12 26=26
 Travel_Word_Problems/405318: If I am going 15 mph, how long will it take me to travel 5 miles?1 solutions Answer 286305 by rfer(12644)   on 2011-02-06 21:22:43 (Show Source): You can put this solution on YOUR website!20 min
 Travel_Word_Problems/405322: If my speend is 60mph and my distance is 10 ft what is my time and how do I solve it by showing work1 solutions Answer 286304 by rfer(12644)   on 2011-02-06 21:21:46 (Show Source): You can put this solution on YOUR website!10/5280=0.00189 miles D=rt 0.00189=60t 0.00189/60=t t=0.0000312 hrs t=3.12X10^-5 hrs
 test/405321: T-1/8>1/21 solutions Answer 286303 by rfer(12644)   on 2011-02-06 21:17:29 (Show Source): You can put this solution on YOUR website!t > 5/8
 Travel_Word_Problems/405335: Sydney rode her bike to school at an average speed of 15 miles per hour. What was her speed in feet per minute? 1 solutions Answer 286302 by rfer(12644)   on 2011-02-06 21:15:44 (Show Source): You can put this solution on YOUR website!15/60=0.25 mi/ min
 Volume/405280: Given a right triangle with a=3 and c=11, find b to three decimal places.1 solutions Answer 286283 by rfer(12644)   on 2011-02-06 19:17:28 (Show Source): You can put this solution on YOUR website!a^2+b^2=c^2 9+b^2=121 b^2=121-9 b^2=112 sqrt 112=10.58
 percentage/405217: A Television Is On Sale At 10% off the orginial price . if the original price of the television was 450.00 , what is the sale price ?1 solutions Answer 286282 by rfer(12644)   on 2011-02-06 19:15:37 (Show Source): You can put this solution on YOUR website!450*0.90=405
 Numeric_Fractions/405218: I just had a question about how to solve this particular problem... I need to add 7/12 + 14/15 , but I don't know how to find the lowest common denominators. Your help would be much appreciated! (:1 solutions Answer 286280 by rfer(12644)   on 2011-02-06 19:14:20 (Show Source): You can put this solution on YOUR website!some times it is easest to just multiply the two denominators for a commonj denominator 7/12+14/15 105/180+168/180=273/180 reduce 1 31/60
 Mixture_Word_Problems/405214: The meat market sells lean ground beef for \$2.40 per pound. How much should the meat market charge for a 1.65-pound package of lean ground beef?1 solutions Answer 286279 by rfer(12644)   on 2011-02-06 19:10:36 (Show Source): You can put this solution on YOUR website!2.40*1.65=3.96
 Miscellaneous_Word_Problems/405226: It takes a student 30 mins to drive from school to work, a distance of 20 mil. At what average rate of speed does the student drive?1 solutions Answer 286278 by rfer(12644)   on 2011-02-06 19:09:00 (Show Source): You can put this solution on YOUR website!40 mph
 Radicals/405219: Guy Wire. How long is a guy wire reaching from the top of a 9 ft pole to a point on the ground 6 feet from the pole. What is the exact length in feet?1 solutions Answer 286277 by rfer(12644)   on 2011-02-06 19:06:13 (Show Source): You can put this solution on YOUR website!a^2+b^2=c^2 81+36=117 sqrt 117=10.81665383 ft
 decimal-numbers/405269: Write 8/9 as a decimal. Round to the nearest thousandth if necessary.1 solutions Answer 286275 by rfer(12644)   on 2011-02-06 19:02:53 (Show Source): You can put this solution on YOUR website!0.889
 Travel_Word_Problems/405120: If a 3ft stick in the ground casts a shadow of 1.2ft find the length of the shadow of a 48.4ft tree. 1 solutions Answer 286217 by rfer(12644)   on 2011-02-06 16:11:11 (Show Source): You can put this solution on YOUR website!3/1.2=48.4/x 3x=57.6 x=19.2 ft
 percentage/405102: An aunt lent her nephew \$2000. The newphew agreed to pay his aunt 4% simple interest. If he promised to repay her the entire amount owed at the end of 3 years, how much money must he pay her?1 solutions Answer 286216 by rfer(12644)   on 2011-02-06 16:08:49 (Show Source): You can put this solution on YOUR website!I=Prt I=2000*0.04*3 I=240 2000+240=\$2,240
 Travel_Word_Problems/405126: A bag of fertilizer covers 6000ft2. How many bags are needed to cover an area of 32000ft2?1 solutions Answer 286214 by rfer(12644)   on 2011-02-06 16:05:58 (Show Source): You can put this solution on YOUR website!32/6=5.3 can't buy part bag so = 6 bags
 Linear-equations/405136: find the slope for the pairs if it exist (4,7) (6,-10)1 solutions Answer 286212 by rfer(12644)   on 2011-02-06 16:01:28 (Show Source): You can put this solution on YOUR website!slope m=(-10-7)/(6-4) m=-17/2
 Linear_Equations_And_Systems_Word_Problems/405145: A farmer had some chickens and some cows. She counted 40 heads and 126 legs. How many chickens and how many cows did she have.1 solutions Answer 286211 by rfer(12644)   on 2011-02-06 15:58:32 (Show Source): You can put this solution on YOUR website!ch +co=40 co=40-ch 2ch+4co=126 2ch+4(40-ch)=126 2ch+160-4ch=126 -2ch=-34 ch=17 chickens co=40-17=23 cows
 test/405081: Maria weighs 124 pounds. What is her weight in kilograms 1 solutions Answer 286195 by rfer(12644)   on 2011-02-06 14:48:51 (Show Source): You can put this solution on YOUR website!124*0.4536=56.25 kg
 test/405065: Coat cost \$156 this is 35% of original price. What is original price?1 solutions Answer 286194 by rfer(12644)   on 2011-02-06 14:42:59 (Show Source): You can put this solution on YOUR website!156/0.35=445.71
 Inequalities/405027: Solve the following equation (x+3)(3x+5)=71 solutions Answer 286193 by rfer(12644)   on 2011-02-06 14:41:11 (Show Source): You can put this solution on YOUR website!3x^2+14x+8=0 zero's -4, -0.7 vertex= -2.3,-8.3) y int=(0,8)
 Mixture_Word_Problems/405043: Bob Grey invests \$22,000, some at 7% and some at 6% annual interest. If he recieves an annual return of \$1,420, how much should be invested at eact rate?1 solutions Answer 286190 by rfer(12644)   on 2011-02-06 14:31:42 (Show Source): You can put this solution on YOUR website!0.07x+0.06(22000-x)=1420 0.07x+1320-0.06x=1420 0.01x=100 x=10,000 22000-x=12,000
 Coordinate-system/405056: y/6 = 12/81 solutions Answer 286188 by rfer(12644)   on 2011-02-06 14:28:33 (Show Source): You can put this solution on YOUR website!8y=72 y=9
 Equations/405067: solve equation: x/3= 3x - 21 solutions Answer 286187 by rfer(12644)   on 2011-02-06 14:27:25 (Show Source): You can put this solution on YOUR website!x=3(3x-2) x=9x-6 6=8x x=6/8 x=3/4
 testmodule/404874: if a person have 15 rupees then how we divide it into half, one-third and one-ninth plz expalin? 1 solutions Answer 286099 by rfer(12644)   on 2011-02-06 01:26:05 (Show Source): You can put this solution on YOUR website!15*1/2=15/2=7.5 15*1/3=15/3=5 15*1/9=15/9=1.67
 Probability-and-statistics/404816: . Short Answer. Of 29 college juniors at Pelican State College, 13 preferred pepperoni pizza, 11 preferred supreme, and 5 preferred cheese. If we picked a college junior at Pelican State College at random, what is the probability that he or she would prefer pepperoni? Give solution exactly in reduced fraction form. 1 solutions Answer 286098 by rfer(12644)   on 2011-02-06 01:23:35 (Show Source): You can put this solution on YOUR website!13/29
 Inequalities/404834: Could I please have some help with solving this problem and also could you show me how you came up with the answer. Thank you 6+2x<21 solutions Answer 286096 by rfer(12644)   on 2011-02-06 01:20:11 (Show Source): You can put this solution on YOUR website!2x < 2-6 2x < -4 x < -2
 Quadratic_Equations/404846: Solve 5x^2+x=31 solutions Answer 286095 by rfer(12644)   on 2011-02-06 01:15:59 (Show Source): You can put this solution on YOUR website!(-0.9,0) (0.7,0) vertex (-0.1,-3)
 Quadratic_Equations/404847: Solve x^2-6x=-61 solutions Answer 286094 by rfer(12644)   on 2011-02-06 01:09:52 (Show Source): You can put this solution on YOUR website!(1.3,0) (4.7,0) vertex (3,-3)
 Quadratic_Equations/404848: Solve 4x^2+13x=121 solutions Answer 286093 by rfer(12644)   on 2011-02-06 01:00:34 (Show Source): You can put this solution on YOUR website!(0.8,0) (-4,0) vertex (1.6,-22)