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# Recent problems solved by 'rfer'

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 Money_Word_Problems/667914: After 3 months the simple interest earned annually on an investment of \$7000 was \$63. Find the interest rate1 solutions Answer 415252 by rfer(12654)   on 2012-10-17 14:11:49 (Show Source): You can put this solution on YOUR website!63=7000*r*0.25 63/1750=r 0.036=3.6%
 Numeric_Fractions/667020: It says a boy divided 5/8 of dog food into 3 dishes for his dogs. What fraction of the pounds would be in each dish. I cant figure it out.Will you help?1 solutions Answer 414794 by rfer(12654)   on 2012-10-15 23:16:25 (Show Source): You can put this solution on YOUR website!(5/8)/(3/1)= 5/8*1/3=5/24 each
 Geometry_Word_Problems/667051: Find the area of a rectangular window measuring 1/2 meter by 3/4 meter. 1 solutions Answer 414792 by rfer(12654)   on 2012-10-15 23:13:45 (Show Source): You can put this solution on YOUR website!1/2*3/4=3/8 sq meters
 Linear_Equations_And_Systems_Word_Problems/667062: A clothing store offers a 20% discount on all purchases. How much would a shopper pay (before tax) for an item originally costing \$21.00 dollars?1 solutions Answer 414791 by rfer(12654)   on 2012-10-15 23:12:02 (Show Source): You can put this solution on YOUR website!21*0.80=\$16.80
 Mixture_Word_Problems/667077: How do you write 280,000,000 in word form? 1 solutions Answer 414790 by rfer(12654)   on 2012-10-15 23:10:09 (Show Source): You can put this solution on YOUR website!Two hundred eighty million
 test/666475: Karen works for \$6 an hour. A total of 25% of her salary is deducted for taxes and insurance. She is trying to save \$450 for a new car stereo and speakers. How many hours must she work to take home \$450 if she saves all of her earnings?1 solutions Answer 414503 by rfer(12654)   on 2012-10-15 00:16:18 (Show Source): You can put this solution on YOUR website!450/(6*0.75)=100 hrs
 Money_Word_Problems/666510: If Sylvia interest \$1800 in a simple interest account and earned \$84 in 8 months, what is the annual interest rate?1 solutions Answer 414502 by rfer(12654)   on 2012-10-15 00:14:08 (Show Source): You can put this solution on YOUR website!I=Prt 84=1800r0.6667 r=84/1200 r=0.07=7%
 test/666497: Find the slope, if it exist, of the line containing the pair of points. (-3,-2) and (-9,-8)1 solutions Answer 414501 by rfer(12654)   on 2012-10-15 00:11:54 (Show Source): You can put this solution on YOUR website!slope m=(-8--2)/(-9--3) m=-6/-6 m=1
 decimal-numbers/666505: what is the cost, in dollars, of 13.4 gallon of lead-free gasoline at 112.9 cents per gallon? (112.9 cents = \$1.1291 solutions Answer 414500 by rfer(12654)   on 2012-10-15 00:10:26 (Show Source): You can put this solution on YOUR website!13.4*1.129=\$15.13
 Angles/666385: Angle one is three times the measure of angle two. Angle one and angle two are supplementary1 solutions Answer 414421 by rfer(12654)   on 2012-10-14 20:17:03 (Show Source): You can put this solution on YOUR website!x+3x=180 4x=180 x=180/4 x=45 3x=135
 Money_Word_Problems/666370: You take out a 1-year, \$5,000 loan at 8% simple annual interest. The lender charges you a \$250 fee. Thinking of the fee as additional interest, what is the actual annual interest rate r you will pay? 1 solutions Answer 414420 by rfer(12654)   on 2012-10-14 20:15:49 (Show Source): You can put this solution on YOUR website!250/5000=0.05=5% 0.08+0.05=0.13=13%
 Money_Word_Problems/665947: A principal of \$6000 is invested in an account paying an annual rate of 4%. Find the amount in the account after 3 years if the account is compounded semiannually,quarterly and monthly?1 solutions Answer 414180 by rfer(12654)   on 2012-10-13 20:47:01 (Show Source): You can put this solution on YOUR website!I will do one, you do the others A=6000(1+0.04/2)^3*2 A=6000(1.02)^6 A=6000*1.1262 A=\$6757.20
 Inverses/665882: I don't get how to do 3r/4-4/5=7/10. Can you help?1 solutions Answer 414179 by rfer(12654)   on 2012-10-13 20:43:15 (Show Source): You can put this solution on YOUR website!3r/4-4/5=7/10 3r/4=7/10+4/5 3r/4=7/10+8/10 3r/4=15/10 r=(15/10)(4) x=60/10 x=6
 Travel_Word_Problems/665944: How long will it take a bike rider to travel 750 meters if they are traveling at 5 meters per second1 solutions Answer 414177 by rfer(12654)   on 2012-10-13 20:38:03 (Show Source): You can put this solution on YOUR website!750/5=150 seconds 150/60=2.5 minutes
 Human-and-algebraic-language/665935: If Kachina Caron invested \$1800 in a simple interest account and earned \$54 in 6 months, what is the annual interest rate?1 solutions Answer 414176 by rfer(12654)   on 2012-10-13 20:36:33 (Show Source): You can put this solution on YOUR website!I=Prt 54=1800*r*0.5 r=54/900 r=0.06=6%
 Angles/665923: an angle is 16 degrees more than it's supplement. find the angle1 solutions Answer 414175 by rfer(12654)   on 2012-10-13 20:34:42 (Show Source): You can put this solution on YOUR website!x+x+16=180 2x=180-16 2x=164 x=164/2 x=82 x+16=98
 Money_Word_Problems/665939: How much interest is earned on \$52,000.00 at .30% for 3 months? Also, how much interest is earned on \$52,000.00 at .40% for 3 months?1 solutions Answer 414174 by rfer(12654)   on 2012-10-13 20:32:14 (Show Source): You can put this solution on YOUR website!I=Prt I=52000*0.003*.25 I=\$39 ----------- I=52000*0.004*.25 I=\$52
 test/665809: 3x-8>10, i need the inequality 1 solutions Answer 414101 by rfer(12654)   on 2012-10-13 13:10:20 (Show Source): You can put this solution on YOUR website!3x > 10+8 3x > 18 x > 18/3 x > 6
 Miscellaneous_Word_Problems/665378: if you want to increase your income next year by \$1000 how many additional hours will you need to work if you make \$7 per hour? 1 solutions Answer 413789 by rfer(12654)   on 2012-10-11 21:54:16 (Show Source): You can put this solution on YOUR website!1000/7=142.9 hrs
 Signed-numbers/664977: 9-3(5-4)-61 solutions Answer 413619 by rfer(12654)   on 2012-10-11 13:38:56 (Show Source): You can put this solution on YOUR website!9-3-6=0
 test/665013: write the slope intercept equation for (-4,-1) and (1,9)1 solutions Answer 413617 by rfer(12654)   on 2012-10-11 13:37:19 (Show Source): You can put this solution on YOUR website!slope m=(9--1)/(1--4) m=10/5 m=2 --------------- y=mx+b 9=2*1+b 9=2+b b=4.5 ---------------- y=2x+4.5
 Finance/664979: Find the accumulated amount if \$5,000 is invested at 8% compounded annually for 6 years 1 solutions Answer 413615 by rfer(12654)   on 2012-10-11 13:35:09 (Show Source): You can put this solution on YOUR website!A=5000(1.08)^6 A=5000*1.5869 A=\$7934.50
 test/665021: At what interest rate should you invest your money if you want it to double in 6 years1 solutions Answer 413613 by rfer(12654)   on 2012-10-11 13:30:56 (Show Source): You can put this solution on YOUR website!=12%
 percentage/664771: what is the original price if there is a discount is 20% and after the discount it is 52dollars1 solutions Answer 413451 by rfer(12654)   on 2012-10-10 22:42:10 (Show Source): You can put this solution on YOUR website!52/0.80=\$65
 Geometry_proofs/664778: given: 2(x+5)= 8(x-7)rove x = 111 solutions Answer 413450 by rfer(12654)   on 2012-10-10 22:40:54 (Show Source): You can put this solution on YOUR website!2(11+5)=8(11-7) 2*16=8*4 32=32
 Numeric_Fractions/664790: (3x+6)1/3=41 solutions Answer 413448 by rfer(12654)   on 2012-10-10 22:39:11 (Show Source): You can put this solution on YOUR website!x+2=4 x=4-2 x=2
 Numeric_Fractions/664803: can u help me solve 12 divided by 2 2/7 x 3 3/7?1 solutions Answer 413447 by rfer(12654)   on 2012-10-10 22:38:01 (Show Source): You can put this solution on YOUR website!12/(16/7)(24/7)= 12*(7/16)(24/7)= 21/4*24/7=504/28=18
 Age_Word_Problems/664814: Working backwards. Bob says, "I am thinking of a number. If i decrease it by 19, and then add 40, i get 48." What is Bob's number?1 solutions Answer 413444 by rfer(12654)   on 2012-10-10 22:33:36 (Show Source): You can put this solution on YOUR website!48-40=8 8+19=27
 test/664633: 6x+12-8x=201 solutions Answer 413406 by rfer(12654)   on 2012-10-10 20:05:24 (Show Source): You can put this solution on YOUR website!-2x=20-12 -2x=8 x=8/-2 x=-4
 Travel_Word_Problems/664667: Sam rode his bicycle 9 and 2/5 miles per hour. If he rode for 3/4 of an hour, how many miles did he travel in simplest form?1 solutions Answer 413405 by rfer(12654)   on 2012-10-10 20:02:16 (Show Source): You can put this solution on YOUR website!d=rt d=9.4*0.75 d=7.05 miles
 Money_Word_Problems/664676: find the amount of total sales and total commision made? numbers of item 7, unit price 2610, Commission rate 6.5% , total sale ? commission ?1 solutions Answer 413403 by rfer(12654)   on 2012-10-10 19:59:29 (Show Source): You can put this solution on YOUR website!total sales 2610*7=18270 commission 18270*0.065=1187.55