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# Recent problems solved by 'rfer'

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 Money_Word_Problems/460683: Using the simple interest formula I=PRT,DETERMINE THE AMOUNT OF INTEREST YOU'D PAY ON A LOAN OF \$3000 BORROWED FOR 2 YEARS 8 MONTHS AT AN INTERST RATE OF 12%1 solutions Answer 315992 by rfer(12644)   on 2011-06-13 18:32:05 (Show Source): You can put this solution on YOUR website!I=3000*0.12*2.667 I=\$960.12
 Rectangles/460664: What is the angle measurement (distance, corner to corner) of a rectangle that is 28ft by 40ft? Thank you1 solutions Answer 315991 by rfer(12644)   on 2011-06-13 18:29:29 (Show Source): You can put this solution on YOUR website!28^2+40^2=c^2 784+1600=2384 sqrt 2384=48.8 ft
 Equations/460675: i need help working out a problem. e/2 + 7 = 4e1 solutions Answer 315990 by rfer(12644)   on 2011-06-13 18:26:48 (Show Source): You can put this solution on YOUR website!e/2+7=4e e/2=(4e-7) e=(4e-7)(2) e=8e-14 -7e=-14 e/2
 Linear_Equations_And_Systems_Word_Problems/460483: a disc jockey now charges \$13580 for a full nightof music. recently decreaseed his price by 8%. what did he charge before the decrease1 solutions Answer 315897 by rfer(12644)   on 2011-06-13 13:35:09 (Show Source): You can put this solution on YOUR website!13580/0.92=\$14,760.87
 Age_Word_Problems/460546: Mike and Bill sell cars for Jangle's Auto. Over the past year they sold 640 cars. Assuming Mike sells 3 times as many as Bill, how many cars did Mike sell? 1 solutions Answer 315891 by rfer(12644)   on 2011-06-13 13:22:34 (Show Source): You can put this solution on YOUR website!B=x M=3x x+3x=640 4x=640 x=160 3x=480
 Inequalities/460566: Can anyone help me determine whether the ordered pair is a solution of the inequalty? (2,11); 3y-4x>51 solutions Answer 315890 by rfer(12644)   on 2011-06-13 13:20:11 (Show Source): You can put this solution on YOUR website!3y-4*2 > 5 3y-8 > 5 3x > 13 x > 4 1/3 no
 Inequalities/460565: Can anyone please help me solve this? 3y +2y ≤ -5 The solution is :y y ____ ____}1 solutions Answer 315888 by rfer(12644)   on 2011-06-13 13:17:30 (Show Source): You can put this solution on YOUR website!5y =< -5 y =< -1
 expressions/460494: 6(r - 1) + 5(r + 4)1 solutions Answer 315887 by rfer(12644)   on 2011-06-13 13:15:45 (Show Source): You can put this solution on YOUR website!6r-6+5r+20= 11r+14
 Linear-systems/460558: Is 2x+3y a linear equation? Is y=2-5x^3 a linear equation?1 solutions Answer 315886 by rfer(12644)   on 2011-06-13 13:13:22 (Show Source): You can put this solution on YOUR website!1) linear expression 2) no-
 Inequalities/460559: 3(-7-1)+1≤-4(2x+3)-51 solutions Answer 315885 by rfer(12644)   on 2011-06-13 13:11:10 (Show Source): You can put this solution on YOUR website!-23 =< -8x-12-5 -23 =< -8x-17 -6 =< -8x 3/4 => x
 Money_Word_Problems/460543: Maria deposits \$8000 into an account that pays simple interest at a rate of 5 per year. How much interest will she be paid in the first 2 years?1 solutions Answer 315884 by rfer(12644)   on 2011-06-13 13:08:23 (Show Source): You can put this solution on YOUR website!I=Prt I=8000*0.05*2 I=\$800.00
 Money_Word_Problems/460556: a computer store bought a program for \$7.00 and sold it for \$10.00 Find the dollar amount markup and the percent markup based on the selling price.1 solutions Answer 315883 by rfer(12644)   on 2011-06-13 12:59:02 (Show Source): You can put this solution on YOUR website!\$3.00 markup 3/10=0.3=30%
 Linear-equations/460557: A line contains the points (3, -1) and (-1, 2). Another line graphed in the same coordinate plane contains the points (2,0) and (-2,3). Based on the slope of these lines, are they parallel, perpendicular or neither?1 solutions Answer 315881 by rfer(12644)   on 2011-06-13 12:57:28 (Show Source): You can put this solution on YOUR website!m=(2--1)/(-1-3) m=3/-4 m=-3/4 ----------------- m=(3-0)/(-2-2) m=3/-4 m=-3/4 ------------ parallel
 Age_Word_Problems/460547: One-eleventh of all sales at Joe's Diner is for cash. If cash sales for the week were \$380, what were Joe's total sales? 1 solutions Answer 315879 by rfer(12644)   on 2011-06-13 12:54:00 (Show Source): You can put this solution on YOUR website!x=380/(1/11) x=380*11/1 x=\$4180
 Angles/460392: Find the supplement of the complement of a 51 degree angle.1 solutions Answer 315770 by rfer(12644)   on 2011-06-12 21:19:26 (Show Source): You can put this solution on YOUR website!90-51=39 180-39=141 degrees
 Travel_Word_Problems/460338: Two trains leave stations 336 miles apart at the same time and travel toward each other. One train travels at 75 miles per hour while the other travels at 65 miles per hour. How long will it take for the two trains to meet? 1 solutions Answer 315769 by rfer(12644)   on 2011-06-12 21:16:08 (Show Source): You can put this solution on YOUR website!approaching at 140 mph 336/140=2.4 hrs=2 hrs 24 min
 Graphs/460383: Graph the line containing the given pair of points and find the slope. (3,2), (-6,-5)1 solutions Answer 315766 by rfer(12644)   on 2011-06-12 21:09:34 (Show Source): You can put this solution on YOUR website!slope m=(-5-2)/(-6-3) m=-7/-9 m=7/9
 Travel_Word_Problems/460385: If you fly a plane going north for 4 hours and make it 400 km, what was your velocity1 solutions Answer 315765 by rfer(12644)   on 2011-06-12 21:07:34 (Show Source): You can put this solution on YOUR website!400/4=100kph
 Finance/460302: A real estate agent works on 11% commission. What is her commission on a house that she sold for \$390,600?1 solutions Answer 315731 by rfer(12644)   on 2011-06-12 18:19:40 (Show Source): You can put this solution on YOUR website!390600*0.11=\$42,966
 Money_Word_Problems/460312: If 4x - 7 = 2x + 5, what is x?1 solutions Answer 315730 by rfer(12644)   on 2011-06-12 18:17:37 (Show Source): You can put this solution on YOUR website!2x=12 x=6
 Proportions/460298: Find the discount on a book that is \$14.95 and on sale for 20%1 solutions Answer 315706 by rfer(12644)   on 2011-06-12 16:56:40 (Show Source): You can put this solution on YOUR website!14.95/.8=18.69 18.69-14.95=\$3.74
 Polynomials-and-rational-expressions/460214: Essay: Show all work. Find the following product: (y-7)^21 solutions Answer 315705 by rfer(12644)   on 2011-06-12 16:52:31 (Show Source): You can put this solution on YOUR website!(y-7)(y-7) y^2-7y-7y+49 y^2-14y+49
 Proportions/460294: Find the amount of simple interest on an investment of \$3,100 for 2 and a half years at an annual rate of 4 3/4%. Round to the nearest cent1 solutions Answer 315703 by rfer(12644)   on 2011-06-12 16:48:43 (Show Source): You can put this solution on YOUR website!I=Prt I=3100*0.0475*2.5 I=\$368.13
 Miscellaneous_Word_Problems/460292: I am having trouble with this last question can anyone help me with this. I have part a and b but I am having trouble with part c of this question. Thanks so much for the help. 3. You recently started the paperwork to purchase your new home, and you were just notified that you can move into the house in 2 weeks. You decide to hire a moving company, but are unsure which company to choose. You search online and are interested in contacting two companies, Heavy Lifters and Quick Move, to discuss their rates. Heavy Lifting charges a \$75 fee plus \$30 per hour. Quick Move charges \$45 per hour with no additional fees. a) Which mover provides a better deal for 12 hours of work? How did you arrive at your answer? b) Which mover provides a better deal for 3 hours of work? How did you arrive at your answer? c) For what values h (hours) does Heavy Lifting offer the better deal? Express your answer as an inequality. Explain how you reached your answer. 1 solutions Answer 315702 by rfer(12644)   on 2011-06-12 16:46:41 (Show Source): You can put this solution on YOUR website!C) 75+30x < 45x 75 < 15x 5 < x more than 5 hrs
 Money_Word_Problems/460293: Suppose you are setting up for a mall business and have invested \$10,000 to produce an item that will sell for \$15. If each unit can be produced for \$9 how many units must you sell to break even?1 solutions Answer 315701 by rfer(12644)   on 2011-06-12 16:43:11 (Show Source): You can put this solution on YOUR website!10000/6=1667 units
 Inequalities/460242: (3x – 3.5) – (x + 1.8) subtracting polynomials1 solutions Answer 315699 by rfer(12644)   on 2011-06-12 16:41:25 (Show Source): You can put this solution on YOUR website!3x-3.5-x-1.8=2x-5.3
 Graphs/460254: find the x intercept 2x+y=71 solutions Answer 315698 by rfer(12644)   on 2011-06-12 16:39:41 (Show Source): You can put this solution on YOUR website!2x+0=7 2x=7 x=3.5 (3.5,0)
 Proportions/460282: A utility pole 8 meters tall cast a 12 meter shadow. at the same time a building cast a 99 meter shadow. How tall is the building?1 solutions Answer 315695 by rfer(12644)   on 2011-06-12 16:35:21 (Show Source): You can put this solution on YOUR website!8/12=x/99 12x=792 x=66 meters
 Proportions/460284: Five less than a number is at least 11. A. Write an inequality for the sentence. B. Solve the inequality on a number line. Explain your answer.1 solutions Answer 315694 by rfer(12644)   on 2011-06-12 16:34:00 (Show Source): You can put this solution on YOUR website!x-5 => 11
 Equations/460289: Word problem : The total number of Democrats and Republicans in the U.S House of Representatives during the 109th session was 434. There were 30 more Republicans than Democrats . How many members of each party were there ? 1 solutions Answer 315693 by rfer(12644)   on 2011-06-12 16:32:27 (Show Source): You can put this solution on YOUR website!x+x+30=434 2x=404 x=202 Dems x+30=232 Rep
 Inequalities/460288: (3x2 – 10x – 8) ÷ (3x + 2) I need help dividing this polynomial1 solutions Answer 315692 by rfer(12644)   on 2011-06-12 16:30:46 (Show Source): You can put this solution on YOUR website!=x-4 R=0