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# Recent problems solved by 'rfer'

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 Polynomials-and-rational-expressions/735909: what is the factor of -3b^2+15b+18 1 solutions Answer 449599 by rfer(13569)   on 2013-04-09 22:39:32 (Show Source): You can put this solution on YOUR website!3(-b+6)(b+1)
 Numeric_Fractions/735908: 16 Multiplied by 7/8=?1 solutions Answer 449598 by rfer(13569)   on 2013-04-09 22:37:08 (Show Source): You can put this solution on YOUR website!16*7/8=14
 Signed-numbers/735915: (-4+6)[(-8)+(-7)-(-10)] I am not sure how to solve this problem.1 solutions Answer 449597 by rfer(13569)   on 2013-04-09 22:36:07 (Show Source): You can put this solution on YOUR website!(2)[-5]=-10
 Polynomials-and-rational-expressions/735910: what is the factor of 5x^2+17x+61 solutions Answer 449595 by rfer(13569)   on 2013-04-09 22:33:58 (Show Source): You can put this solution on YOUR website!(x+3)(5x+2)
 Quadratic-relations-and-conic-sections/735894: Find the vertex of the parabola. y = -4x2 - 16x - 111 solutions Answer 449593 by rfer(13569)   on 2013-04-09 22:31:18 (Show Source): You can put this solution on YOUR website!(-2,5)
 Polynomials-and-rational-expressions/735907: what is the factor of -24-2x+x^2 , 1 solutions Answer 449590 by rfer(13569)   on 2013-04-09 22:27:57 (Show Source): You can put this solution on YOUR website!(x-6)(x+4)
 Money_Word_Problems/735631: Suppose \$2000 is invested at 5.75% annual interest compounded continuously for 20 months. How much will the investment be worth at the end of 20 months? 1 solutions Answer 449506 by rfer(13569)   on 2013-04-09 14:51:24 (Show Source): You can put this solution on YOUR website!A=2000(2.7183)^20/12*0.0575 A=2000(1.1) A=\$2200
 Equations/735642: write the equation for the line in slope intercept form that passes through the point (1,-6) and is parallel to the line y-2x=41 solutions Answer 449504 by rfer(13569)   on 2013-04-09 14:46:51 (Show Source): You can put this solution on YOUR website!-6-2*1=b -6-2=b b=-8 ------- y=2x-8
 Polynomials-and-rational-expressions/735661: how do you factor 6c^2+7c+2 1 solutions Answer 449501 by rfer(13569)   on 2013-04-09 14:43:04 (Show Source): You can put this solution on YOUR website!(3c+2)(2c+1)
 Reduction-of-unit-multipliers/735584: Please help, there are 114 rings for \$85,000 what it the unit price/rate1 solutions Answer 449492 by rfer(13569)   on 2013-04-09 13:24:24 (Show Source): You can put this solution on YOUR website!85000/114=\$745.61 ea
 test/735597: 4x-7(6x+1)1 solutions Answer 449490 by rfer(13569)   on 2013-04-09 13:21:49 (Show Source): You can put this solution on YOUR website!4x-42x-7= -38x-7
 Geometry_Word_Problems/735633: 12 by 9 rectangle with a 3 meter wide mat from corner to corner what is the length of the mat? 1 solutions Answer 449488 by rfer(13569)   on 2013-04-09 13:18:46 (Show Source): You can put this solution on YOUR website!This is a 3, 4, 5 triangle =15 meters
 Miscellaneous_Word_Problems/735499: Please help!Of the 49 plays attributed to a playwright 20 are comedies, 14 are tragedies, and 15 are histories. If 1 play is selected at random, find the odds against selecting a tragedy.1 solutions Answer 449441 by rfer(13569)   on 2013-04-09 01:44:41 (Show Source): You can put this solution on YOUR website!35/49=5/7
 Linear-systems/735460: (5a)(5b). what would this be if i Simplify it 1 solutions Answer 449429 by rfer(13569)   on 2013-04-08 23:10:05 (Show Source): You can put this solution on YOUR website!=25ab
 Average/735461: 9% of 4781 solutions Answer 449428 by rfer(13569)   on 2013-04-08 23:09:23 (Show Source): You can put this solution on YOUR website!478*0.09=43.02
 Geometry_Word_Problems/735132: What are the length and width of a rectanglar traffic sign if the length exceeds the width by 9 inches and the perimeter is 158 inches1 solutions Answer 449322 by rfer(13569)   on 2013-04-08 15:06:46 (Show Source): You can put this solution on YOUR website!2x+2(x+9)=158 2x+2x+18=158 4x=158-18 4x=140 x=140/4 x=35 x+9=44
 Average/735142: find the whole number if 1/6 of a number = 851 solutions Answer 449320 by rfer(13569)   on 2013-04-08 15:04:29 (Show Source): You can put this solution on YOUR website!85/(1/6)= 85*6/1=510
 Linear-equations/735004: what is the slope of the line parallel to the line 6x+8y=-121 solutions Answer 449252 by rfer(13569)   on 2013-04-07 23:06:56 (Show Source): You can put this solution on YOUR website!8y=-6x-12 y=-6/8x-12 y=-3/4x-12 slope m=-3/4
 Money_Word_Problems/735032: How much interest will I earn on the following: 8000.00 6.5% for 72 months?1 solutions Answer 449251 by rfer(13569)   on 2013-04-07 23:04:32 (Show Source): You can put this solution on YOUR website!I=8000*0.065*6 I=\$3120
 percentage/734919: 1/2 is what percent of 2? 4 3/4 is what percent of 191 solutions Answer 449202 by rfer(13569)   on 2013-04-07 20:10:09 (Show Source): You can put this solution on YOUR website!0.5/2=0.25=25% 4.75/19=0.25=25%
 Money_Word_Problems/734939: please help me.... I've tried and I keep failing Tony and Barbara want to have \$30,000 in 10 years to help pay for their daughter's college tuition. If they invest in a mutual fund account that earns 10.5% compounded annually, how much should they invest now to achieve their goal?1 solutions Answer 449199 by rfer(13569)   on 2013-04-07 20:06:24 (Show Source): You can put this solution on YOUR website!A=P(1+r)^t 30000=P(1.105)^10 30000=P(2.714) 30000/2.714=P 11053.80=P
 Travel_Word_Problems/734936: David drives 60 miles every hour. How far will he drive after 5 hours? 1 solutions Answer 449197 by rfer(13569)   on 2013-04-07 20:02:26 (Show Source): You can put this solution on YOUR website!60*5=300miles
 Linear-equations/734946: what is the ordered pair if the x-intercept is -21 solutions Answer 449196 by rfer(13569)   on 2013-04-07 19:59:49 (Show Source): You can put this solution on YOUR website!(-2,0)
 Money_Word_Problems/734887: a bank in houston loans 50000 to a business at 12.5% annual simple interest for 15 months. how much interest will the bank earn?1 solutions Answer 449178 by rfer(13569)   on 2013-04-07 18:28:00 (Show Source): You can put this solution on YOUR website!I=50000*0.125*15/12 I=\$7812.50
 Travel_Word_Problems/734888: Hello, this is an example problem that we were given to solve and i don't understand if you could tell me the steps i would be very happy! -A bus travels at an average rate of 30 miles per hour left the city at 11:45 A.M. A car fallows the bus at 45 miles per hour left the city at noon. AT what time did the car catch up to the bus?1 solutions Answer 449176 by rfer(13569)   on 2013-04-07 18:25:24 (Show Source): You can put this solution on YOUR website!overtake speed is 15 mph 15 minute leador 30*0.25=7.5 mile lead 7.5/15=0.5=30 minutes to catch up or 12:30pm
 Linear-equations/734593: What are the ordered pairs for this equation? y= 1/4x-1 (4, ) and (0, )1 solutions Answer 449075 by rfer(13569)   on 2013-04-07 01:42:50 (Show Source): You can put this solution on YOUR website!(4,0) (0,-1)
 logarithm/734570: Find the amount after 3 years if \$700 is invested at 17% compound a) annually b)semiannually C)Quarterly D) Monthly1 solutions Answer 449074 by rfer(13569)   on 2013-04-07 01:40:07 (Show Source): You can put this solution on YOUR website!A) FV=700(1.17)^3 B) FV=700(1+0.17/2)^3*2 C) FV=700(1+0.17/4)^^3*4 D) FV=700(1+0.17/12)^3*12 You do the math.
 test/734644: use the cycle graph to solve the problem a survey of the 5222 vehicles on the campus of state university yielded the following circle graph find the number of vans round your result to the nearest whole number motorcycles 9%, hatchbacks 35%, pickups 27%, sedans 5%, vans 8%, convertibles 16%, 1 solutions Answer 449072 by rfer(13569)   on 2013-04-07 01:33:12 (Show Source): You can put this solution on YOUR website!5222*0.08=418
 Money_Word_Problems/734627: The admission fee at a small fair is \$2 for children and \$4 for adults. On a certain day, 750 people entered the fair and \$2,500 was collected. How many children attended the small fair on that day?1 solutions Answer 449071 by rfer(13569)   on 2013-04-07 01:30:11 (Show Source): You can put this solution on YOUR website!c+a=750 2c+4a=2500 -------- a=750-c ---------- 2c+4(750-c)=2500 2c+3000-4c=2500 -2c=2500-3000 c=-500/-2 c=250 children ----------- 2*250+4a=2500 500+4a=2500 4a=2500-500 a=2000/4 a=500 adults
 Volume/734645: a cylindrical water tank near the town library is 15 meters high and has a circumference of 85 meters. what is the APPROXIMATE volume, to the nearest whole number, of the water tank?1 solutions Answer 449069 by rfer(13569)   on 2013-04-07 01:21:22 (Show Source): You can put this solution on YOUR website!85/3.14=27 27/2=13.5 3.14*13.5^2*15=8629 cu meters
 Age_Word_Problems/734610: John is 1/4 as old as is his father. In 8 years the sum of their ages will be 61. How old is John's father?1 solutions Answer 449068 by rfer(13569)   on 2013-04-07 01:17:47 (Show Source): You can put this solution on YOUR website!1/4x+8+x+8=61 1 1/4x=61-16 5/4x=45 x=45/(5/4) x=45*4/5 x=36