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# Recent problems solved by 'rfer'

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 test/737070: Combination math problems1 solutions Answer 450161 by rfer(12644)   on 2013-04-13 01:02:14 (Show Source): You can put this solution on YOUR website!post a problem
 Travel_Word_Problems/737061: Brett plans to walk 16 miles this weekend. On Saturday, he walked 12 miles. What percent of his goal has Brett walked1 solutions Answer 450160 by rfer(12644)   on 2013-04-13 01:01:30 (Show Source): You can put this solution on YOUR website!75%
 test/737090: 16 year old needs algebra help1 solutions Answer 450158 by rfer(12644)   on 2013-04-13 00:59:33 (Show Source): You can put this solution on YOUR website!post a problem
 Expressions-with-variables/737031: [8/2+3/5]^21 solutions Answer 450145 by rfer(12644)   on 2013-04-12 20:13:04 (Show Source): You can put this solution on YOUR website![(40/10)+(6/10)]^2 46/10*46/10=2116/100=21 4/25
 Numeric_Fractions/737032: What fraction will work to find the decimal representation when you have 117 times 4 over 250 times four when you divide it, it equals .4681 solutions Answer 450144 by rfer(12644)   on 2013-04-12 20:09:55 (Show Source): You can put this solution on YOUR website!468/1000=0.468 reduce 117/250=0.468
 Rate-of-work-word-problems/737050: i type 3/5 of a page in 1/5 hour. at this rate. how long would it take to type a full page1 solutions Answer 450143 by rfer(12644)   on 2013-04-12 20:06:16 (Show Source): You can put this solution on YOUR website!(3/5)/(1/5)=(5/5)/x 3/5x=5/5*1/5 3/5x=5/25 x=(5/25)/(3/5) x=5/25*5/3 x=25/75 x=1/3 hr
 Surface-area/737000: Please help me solve these two questions!!! 1. A rectangular room is 20 feet long and 10 feet wide. If you paint a red rectangle on the floor that is 9 feet long and 4 feet wide, what is the area of the floor in the room that will NOT be red? 2.A rectangular wall is 11.6 feet long and 8.2 feet high. If the door in the wall is 3 feet wide and 7 feet high, what is the area of the wall excluding the door? 1 solutions Answer 450098 by rfer(12644)   on 2013-04-12 15:09:58 (Show Source): You can put this solution on YOUR website!(20*10)-(9*4)=164 sq ft (11.6*8.2)-(3*7)=74.12 sq ft
 Triangles/737001: Two angles of a triangle measure 20 degrees and 50 degrees. What is the measure of the third angle? 1 solutions Answer 450096 by rfer(12644)   on 2013-04-12 15:06:35 (Show Source): You can put this solution on YOUR website!180-20-50=110
 Travel_Word_Problems/737002: you complete a road trip of 180 miles in 3 hours. What is your average speed for the trip? 1 solutions Answer 450095 by rfer(12644)   on 2013-04-12 15:05:48 (Show Source): You can put this solution on YOUR website!180/3=60 mph
 Money_Word_Problems/736979: If 15,000 is invested at an interest rate of 11% per year, find the amount of the investment after 5 years for each of the compounding methods1 solutions Answer 450094 by rfer(12644)   on 2013-04-12 15:05:07 (Show Source): You can put this solution on YOUR website!A=15000(1.11)^5 A=15000*1.685 A=\$25,275.00
 Polynomials-and-rational-expressions/736994: cant figure this out (78 - 14)*[10+45 divided by 5)-(6*6-5*5]1 solutions Answer 450091 by rfer(12644)   on 2013-04-12 15:02:24 (Show Source): You can put this solution on YOUR website!(64)[10+9-(36-25)] (64)[19-11] 64*8=512 Just remember to follow the order of operations.
 Polynomials-and-rational-expressions/736998: 4(3x+2y)-7x-5(2y-4)1 solutions Answer 450086 by rfer(12644)   on 2013-04-12 14:40:12 (Show Source): You can put this solution on YOUR website!12x+8y-7x-10y+20= 5x-2y+20
 Money_Word_Problems/736967: If you borrow \$550 from a credit union at 9% annual interest and \$300 from a bank at 15% annual interest, what is the effective annual interest rate (that is, what single rate of interest on \$850 would result in the same total amount of interest)? (Round your answer to one decimal place.)1 solutions Answer 450085 by rfer(12644)   on 2013-04-12 14:38:44 (Show Source): You can put this solution on YOUR website!550*0.09=49.50 300*0.15=45 total=94.50 94.50/850=0.111=11.1%
 Money_Word_Problems/736969: Find the balance in each account for the given principle and annual interest rate. \$230, 10% \$23.00 \$2,300.00 \$253.00 \$25.30 1 solutions Answer 450084 by rfer(12644)   on 2013-04-12 14:34:24 (Show Source): You can put this solution on YOUR website!A=230(1.10) A=\$253
 absolute-value/736825: two angles are supplementary. one angle is 4inches less than three times the other. find the measures of the angles.1 solutions Answer 450020 by rfer(12644)   on 2013-04-12 01:20:09 (Show Source): You can put this solution on YOUR website!x+3x-4=180 4x=184 x=184/4 x=46 3x-4=134
 absolute-value/736821: one day a store so,d 20 sweatshirts. White ones cost \$10.95 and yellow ones cost \$13.50. In all \$257.25 worth of sweatshirts were sold. how many of each color were sold?1 solutions Answer 450019 by rfer(12644)   on 2013-04-12 01:17:59 (Show Source): You can put this solution on YOUR website!w+y=20 y=20-w 10.95w+13.50y=257.25 10.95w+13.50(20-w)=257.25 10.95w+270-13.50w=257.25 10.95w-13.50w=257.25-270 -2.55w=-12.75 w=-12.75/-2.55 -------------- w=5 white y=20-5 y=15 yellow --------------- 5*10.95=54.75 15*13.50=202.50
 Circles/736824: a 10 speed bicycle tire has a diamter of 27 inches, in highest gear the tire rotates 3.4 times with each pedal turn. how far does the bike travel in this gear with each pedal turn?1 solutions Answer 450018 by rfer(12644)   on 2013-04-12 01:06:35 (Show Source): You can put this solution on YOUR website!27*3.14*3.4=288.25 inches =24 ft
 Geometry_Word_Problems/736777: how many times longer is one mile than one foot 1 solutions Answer 449992 by rfer(12644)   on 2013-04-11 21:18:41 (Show Source): You can put this solution on YOUR website!5280
 Travel_Word_Problems/736769: A light bulb consumes 960 watt-hours per day. How many watt-hours does it consume in 5 days and 12 hours? 1 solutions Answer 449991 by rfer(12644)   on 2013-04-11 21:18:11 (Show Source): You can put this solution on YOUR website!960*5.5=174.55
 Equations/736555: what is the answer to x-7/20=3/8 in lowest terms1 solutions Answer 449923 by rfer(12644)   on 2013-04-11 16:36:35 (Show Source): You can put this solution on YOUR website!x=3/8+7/20 x=15/40+14/40 x=29/40
 Proportions/736578: if the actual distance between two cities is 157.5 miles and the distance on the map is 1 and 3/4 inches, what is the scale of the map?1 solutions Answer 449919 by rfer(12644)   on 2013-04-11 16:34:39 (Show Source): You can put this solution on YOUR website!157.5/1.75=90 miles:1 inch
 Numbers_Word_Problems/736590: frank lives 3/10 mile from school. michelle lives 2 1/3 times as far from school as frank how far does michelle live from school1 solutions Answer 449918 by rfer(12644)   on 2013-04-11 16:32:43 (Show Source): You can put this solution on YOUR website!3/10*7/3=21/30=7/10
 Travel_Word_Problems/736622: The shadow of a flagpole is 40 feet long. At the same time the shadow of a 4 foot tall child is 5 feet long. How tall is the flagpole 1 solutions Answer 449916 by rfer(12644)   on 2013-04-11 16:30:46 (Show Source): You can put this solution on YOUR website!50ft
 Travel_Word_Problems/736608: Jane hiked 3 5/8 miles. Diana kiked 1 3/4 miles. How much farther did Jane hike than Diana? 1 solutions Answer 449915 by rfer(12644)   on 2013-04-11 16:29:37 (Show Source): You can put this solution on YOUR website!29/8-7/4= 29/8-14/8=15/8=1 7/8
 Numeric_Fractions/736266: what is (2 1/6 +3 3/4) - 1 5/12 equal1 solutions Answer 449798 by rfer(12644)   on 2013-04-10 22:02:06 (Show Source): You can put this solution on YOUR website!13/6+15/4-17/12= 26/12+45/12-17/12=54/12=4 1/2
 Equations/736315: four more than one-third of a number is equal to two-fifths of the number1 solutions Answer 449797 by rfer(12644)   on 2013-04-10 21:58:07 (Show Source): You can put this solution on YOUR website!1/3x+4=2/3x 4=1/3x 4/(1/3)=x 4*3/1=x 12=x
 Money_Word_Problems/736298: 3600 dollars is placed in an account with an annual interest rate of 7.5%. How much will be in the account after 23 years, to the nearest cent?1 solutions Answer 449796 by rfer(12644)   on 2013-04-10 21:56:05 (Show Source): You can put this solution on YOUR website!A=3600(1.075)^23 A=3600(5.277) A=\$18997.20
 Percentage-and-ratio-word-problems/736294: Ken received a 12% increase in his salary. It is now \$480 a week. Whst was his original salary1 solutions Answer 449794 by rfer(12644)   on 2013-04-10 21:53:19 (Show Source): You can put this solution on YOUR website!480/1.12=428.57
 Average/736305: if y = 12+3.5x what is the value of y when x =101 solutions Answer 449792 by rfer(12644)   on 2013-04-10 21:52:06 (Show Source): You can put this solution on YOUR website!y=12+3.5*10 y=12+35 y=47
 Signed-numbers/736330: 2[3 - 5(3 - 1)²]1 solutions Answer 449791 by rfer(12644)   on 2013-04-10 21:49:55 (Show Source): You can put this solution on YOUR website!2[3-5(2)^2] 2[3-5(4)] 2[3-20] 2(-17)=-34
 Quadratic_Equations/736320: Hi, we just started the quadratics unit and I don't understand how to tell if a graph represents a quadratic relation. How do you tell? 1 solutions Answer 449789 by rfer(12644)   on 2013-04-10 21:48:14 (Show Source): You can put this solution on YOUR website!The graph will be a cured line or a parabola.