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# Recent problems solved by 'rfer'

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 Numbers_Word_Problems/252234: There are three times as many chocolate cupcakes as vanilla ones. If 1/4 of the chocolate cupcakes have sprinkles, what fractional part are chocolate with sprinkles?1 solutions Answer 184068 by rfer(12678)   on 2009-12-25 12:51:18 (Show Source): You can put this solution on YOUR website!3/4*1/4=3/16
 Average/252042: How many hours will it take to travel 100 miles at 70 mph? 1 solutions Answer 183786 by rfer(12678)   on 2009-12-22 12:10:47 (Show Source): You can put this solution on YOUR website!t=D/r t=100/70 t=1.43 hrs=1 hr 26 min
 percentage/252032: Mrs.Jones paid \$55.73 over regular price for some clothes because of financing them at 19% for 8 months. How much was the regular price of the clothes?1 solutions Answer 183780 by rfer(12678)   on 2009-12-22 11:36:11 (Show Source): You can put this solution on YOUR website!55.73/0.19=\$293.32 price
 Money_Word_Problems/251920: a \$14,500.00, 11% loan is dated May 17 and is due to be repaid on August 17. Assuming ordinary time, what is the ordinary interst on the loan?1 solutions Answer 183701 by rfer(12678)   on 2009-12-21 19:53:03 (Show Source): You can put this solution on YOUR website!A=P(1+r/n)^t A=14500(1.0275)^.25 A=14500(1.0068) A=14598.60 interest = \$98.60
 Inequalities/251960: Weather - a news station guarantees the weather forecast will be within 3degrees F of the actual temperature, or the station will make a donation to a particular charity. If the station forecasts the temperature to be 78 degrees F, at what actual temperatures will the station begin to make a charity donation? 1 solutions Answer 183700 by rfer(12678)   on 2009-12-21 19:48:32 (Show Source): You can put this solution on YOUR website!75 to 81 degrees
 Money_Word_Problems/251921: based on exact time, calculate the ordinary interst on a 15 1/4%, \$24,000.00 loan dated March 25 and maturing on July 25. 1 solutions Answer 183699 by rfer(12678)   on 2009-12-21 19:42:26 (Show Source): You can put this solution on YOUR website!A=P(1+r/n)^t A=24000(1.05)^.33 A=24000(1.016231) A=24389.55 Interest = \$389.55
 Money_Word_Problems/251922: Shea wholesalers received an order costing \$18,500.00. The terms of payment were 3/15, N/45. The owner did not have sufficient cash to pay the invoice within the discount period. is it to their advantage to borrow the money for 30 days at 11%? if so how much money would they save? (assume a 360 day year)1 solutions Answer 183697 by rfer(12678)   on 2009-12-21 19:37:59 (Show Source): You can put this solution on YOUR website!No, they can pay net in 45 days at no additional cost.
 Proportions/251956: If Liz sang at a wedding for 20minutes and got paid \$25, how much would she get paid for singing for 40minutes? write a proportion and then answer the question. how do you do this?1 solutions Answer 183696 by rfer(12678)   on 2009-12-21 19:36:12 (Show Source): You can put this solution on YOUR website!20/25=40/x 20x=1000 x=\$50
 Points-lines-and-rays/251957: If the points (3,2) and (x,-5) lie on a line whose slope is (-7/2), then x equals --i graphed it to see if i could do it and got x=1, but i got the answer wrong, please help.1 solutions Answer 183694 by rfer(12678)   on 2009-12-21 19:33:43 (Show Source): You can put this solution on YOUR website!(5,-5)
 Percentage-and-ratio-word-problems/251872: My favorite store was having a 15% off everything sale. The jeans I wanted were originally \$49.99, but they were already marked down to \$35.99 before the 15% discount. When I bought the jeans, what percent discount off the original price did I pay? (Round to the nearest tenth of a percent.)1 solutions Answer 183561 by rfer(12678)   on 2009-12-21 11:15:25 (Show Source): You can put this solution on YOUR website!35.99*.85=30.59 49.99-30.59=19.40 19.40/49.99=.388=38.8%
 Volume/251810: How much volume does a square container that is 7 feet on a side have?1 solutions Answer 183506 by rfer(12678)   on 2009-12-20 21:50:27 (Show Source): You can put this solution on YOUR website!V=7^3 V=343 cu ft
 Surface-area/251616: The circumference of a circle is 18 pi. inches. Determine the area of the circle.1 solutions Answer 183299 by rfer(12678)   on 2009-12-19 20:59:35 (Show Source): You can put this solution on YOUR website!18/3.14=5.7 5.7/2=2.86 A=pir^2 A=3.14*2.86^2 A=25.68 sq in
 Linear-equations/251597: Find the slope and the y-intercept for the following equation of a line: 5x + 10 y = 20 Slope = y-intercept = 1 solutions Answer 183289 by rfer(12678)   on 2009-12-19 19:54:53 (Show Source): You can put this solution on YOUR website!y int is when x=0 5(0)+10y=20 y=2 (0,2) --------------- 5x+10y=20 10y=5x+20 y=.5x+2 slope = .5
 Expressions-with-variables/251608: Okay I have a problem I don't understand this problem...... Ben bought 8 notbooks for 24.50 some of the notebooks were 2.50 each and the other were 3.25 each if x represents the number of least expensive notebooks,write an equation that can be used to find the number of the least exspensive notebook purchased.1 solutions Answer 183288 by rfer(12678)   on 2009-12-19 19:50:21 (Show Source): You can put this solution on YOUR website!2.5x+3.25(8-x)=24.5 2.5x+26-3.25x=24.5 -.75x=-1.5 x=2 at \$2.50 8-x=6 at \$3.25
 Percentage-and-ratio-word-problems/251498: Mr. Jones was offered a radio by one firm at \$80. less discounts of 20% and 10%; another firm offered him the same radio at \$80. less 30%. Which is the better offer and by how much? a) same price b) 1st, \$1.60. c) 1st, \$.80 d) 2nd, \$1.60 e ) none of these1 solutions Answer 183200 by rfer(12678)   on 2009-12-19 13:20:55 (Show Source): You can put this solution on YOUR website!80*.8*.9=57.60 80*.7=56.00 answer D
 Unit_Conversion_Word_Problems/251261: i have a one-story house that is 32-ft wide adn 48-ft long. I plan to build an addition 12-ft by 16-ft. That will the total area of the house be?1 solutions Answer 183101 by rfer(12678)   on 2009-12-18 19:59:43 (Show Source): You can put this solution on YOUR website!32*48+12*16= 1536+192=1728 Sq ft
 Linear-equations/251421: I need to find the intercepts then use them to graph the equation 3y-9=3x1 solutions Answer 183098 by rfer(12678)   on 2009-12-18 19:50:03 (Show Source): You can put this solution on YOUR website!x int is when y=0 y int is when x=0 3y-9=3 ----------- 3y-3x=9 3(0)-3x=9 x=-3 (-3,0) ---------- 3y-3(0)=9 y=3 (0,3)
 Unit_Conversion_Word_Problems/250813: Jim has 3/4 of a yard of string which he wishes to divide into pieces yard long. How many pieces will he have? ( Sorry but i have no idea what type of problem this is) Thank You Very Much1 solutions Answer 182664 by rfer(12678)   on 2009-12-16 21:41:26 (Show Source): You can put this solution on YOUR website!need more info?
 Money_Word_Problems/250843: 80% of what number is 60. please explain in steps if you can1 solutions Answer 182663 by rfer(12678)   on 2009-12-16 21:37:22 (Show Source): You can put this solution on YOUR website!60/0.8=75
 percentage/250841: find 14% of 40. please explain if you can in steps1 solutions Answer 182662 by rfer(12678)   on 2009-12-16 21:36:33 (Show Source): You can put this solution on YOUR website!40*.14=5.6
 Money_Word_Problems/250845: 80% of what number is 60. please explain in steps if you can.1 solutions Answer 182661 by rfer(12678)   on 2009-12-16 21:35:03 (Show Source): You can put this solution on YOUR website!60/0.8=75
 Money_Word_Problems/250846: 6 is what percent of 18. please explain in steps if you can.1 solutions Answer 182660 by rfer(12678)   on 2009-12-16 21:33:15 (Show Source): You can put this solution on YOUR website!6/18=.333= 33 1/3%
 test/250405: 35. A car travels 55 miles per hour and a plane travels 15 miles per minute. How far does the car travel when the plane travels 500 miles?1 solutions Answer 182350 by rfer(12678)   on 2009-12-15 23:27:12 (Show Source): You can put this solution on YOUR website!500/(15*60)=0.555 55*0.555=30.5 miles
 Numbers_Word_Problems/250406: find two numbers whose sum is 58 and whose difference is 161 solutions Answer 182348 by rfer(12678)   on 2009-12-15 23:23:44 (Show Source): You can put this solution on YOUR website!x+x-16=58 2x=74 x=37 x-16=21
 Travel_Word_Problems/250435: A plane travels east at 210mph. Thirty minutes later, a second plane leaves the same airport traveling west at 160mph. Write and solve an equation to determine when the planes will be 660 miles apart.1 solutions Answer 182346 by rfer(12678)   on 2009-12-15 23:18:56 (Show Source): You can put this solution on YOUR website!A is 105 miles ahead 660-105=555 555/370=1.5 hrs
 Linear-equations/250465: The parenthesis always confuses me can someone help me with this? Im not very good with fractions it says multiply 9/5 times(-7/5) any help is appreciated thanks1 solutions Answer 182344 by rfer(12678)   on 2009-12-15 23:13:33 (Show Source): You can put this solution on YOUR website!9/5*-7/5=-63/25=-2 13/25 () are used just to help explain the problem. ()() just means to multiplt
 Circles/249904: You have installed a new irragration system. Each irrigation arm covers a circular region with a radius of 35 feet. How many square feet will 4 irrigation arms cover?1 solutions Answer 182024 by rfer(12678)   on 2009-12-14 22:29:33 (Show Source): You can put this solution on YOUR website!3.14*35^2=3846.5*4=15,386 sq ft
 Distributive-associative-commutative-properties/249975: Solve. 0.9x + 3 < 1.7x -4.1 solutions Answer 182018 by rfer(12678)   on 2009-12-14 22:19:34 (Show Source): You can put this solution on YOUR website!.9x+3<1.7x-4 7<.8x
 absolute-value/250016: How do you solve the problem : -2x-5 is less than or equal to 31 solutions Answer 182014 by rfer(12678)   on 2009-12-14 22:17:11 (Show Source): You can put this solution on YOUR website!-2x-5<=3 -2x<=8 x<=-4
 Finance/250014: Find the amount of an annuity that consists of 10 annual payments of \$1000 each into an account that pays 6% interest per year1 solutions Answer 182013 by rfer(12678)   on 2009-12-14 22:15:36 (Show Source): You can put this solution on YOUR website!FV=P((1+i)^n-1)/i FV=1000((1.06)^10-1)/.06 FV=1000((1.79)-1)/.06 FV=790/.06 FV=\$13,166.67
 Money_Word_Problems/249998: A man invests \$6500 in an account that pays 6% interest per year, compounded continuously. (a) What is the amount after 2 years? (b) How long will it take for the amount to be \$8000?1 solutions Answer 182011 by rfer(12678)   on 2009-12-14 22:09:46 (Show Source): You can put this solution on YOUR website!a) A=Pe^rt A=6500(2.7183)^.06*2 A=6500(1.1275) A=\$7637.50 b) 2.09 yrs