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# Recent problems solved by 'rfer'

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 Angles/460392: Find the supplement of the complement of a 51 degree angle.1 solutions Answer 315770 by rfer(12660)   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(12660)   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(12660)   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(12660)   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(12660)   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(12660)   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(12660)   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(12660)   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(12660)   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
 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(12660)   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(12660)   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(12660)   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(12660)   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(12660)   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(12660)   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(12660)   on 2011-06-12 16:30:46 (Show Source): You can put this solution on YOUR website!=x-4 R=0
 Inequalities/460287: (4x2 + 3x ) + ( 4x + 5) I need help adding this polynomial1 solutions Answer 315691 by rfer(12660)   on 2011-06-12 16:27:27 (Show Source): You can put this solution on YOUR website!4x^2+7x+5
 Proportions/460285: -7/10 = 2 2/5d A. -1 7/10 B. -3 1/10 C. -7/24 D. -1 17/251 solutions Answer 315690 by rfer(12660)   on 2011-06-12 16:26:32 (Show Source): You can put this solution on YOUR website!d=-7/10*5/12 d=-35/120 d=-7/24 (C)
 Inequalities/460069: What is the answer to this inequality 9x + 7 < 8x -2? show all the steps to get the answer.1 solutions Answer 315547 by rfer(12660)   on 2011-06-11 21:00:37 (Show Source): You can put this solution on YOUR website!9x-8x < -2-7 x < -9
 Equations/460064: 3x+5/9+2x-1/9=7/9 Could you show your steps please, thanks!1 solutions Answer 315546 by rfer(12660)   on 2011-06-11 20:59:20 (Show Source): You can put this solution on YOUR website!5x+4/9=7/9 5x=7/9-4/9 5x=3/9 x=(3/9)/5 x=3/9*1/5 x=3/45 x=1/15
 Travel_Word_Problems/460059: If I am driving 50 miles per hour how long would it take to get 74 miles? If I am driving 50 miles per hour how long would it take to get 44 miles?1 solutions Answer 315536 by rfer(12660)   on 2011-06-11 19:52:05 (Show Source): You can put this solution on YOUR website!74/55=1.35 hrs=1 hr 21 min 44/55=0.8 hrs=48 minutes
 Radicals/460036: square root of 20 plus the square root of 64 minus the square root of 1251 solutions Answer 315527 by rfer(12660)   on 2011-06-11 18:36:10 (Show Source): You can put this solution on YOUR website!4.47+8-11.18=1.29
 Sequences-and-series/460021: Identify the pattern and find the next term: 6, 1, 9, 5, 12, 9, 15,____ 1 solutions Answer 315524 by rfer(12660)   on 2011-06-11 18:34:11 (Show Source): You can put this solution on YOUR website!next term=13
 Graphs/460034: i need help with the following: Solve the inequality 2(3 - x) > 4 - 5x Thank You1 solutions Answer 315522 by rfer(12660)   on 2011-06-11 18:30:47 (Show Source): You can put this solution on YOUR website!6-2x > 4-5x 3x > -2 x > -2/3
 Graphs/460038: I am starting to remoldle my yard and I want to spend no less than \$6000 and no more tha \$10000. Write an inqualities for this1 solutions Answer 315519 by rfer(12660)   on 2011-06-11 18:27:35 (Show Source): You can put this solution on YOUR website!6000 =< x =< 10000
 Percentage-and-ratio-word-problems/460002: If \$35,600 was earned this year which was an increase of 14% over the previous year. What were the earnings last year?1 solutions Answer 315498 by rfer(12660)   on 2011-06-11 16:50:49 (Show Source): You can put this solution on YOUR website!35600/1.14=\$31,228.07
 Quadratic_Equations/460010: (3/2+1/3)+(7/6-3/4)1 solutions Answer 315497 by rfer(12660)   on 2011-06-11 16:47:06 (Show Source): You can put this solution on YOUR website!18/12+4/12+14/12-9/12=27/12=2 1/4
 Linear-equations/459978: find the x and y intercepts and graph the equation plotting the intercepts. please show all of your work. 5x -7y = -351 solutions Answer 315477 by rfer(12660)   on 2011-06-11 14:02:17 (Show Source): You can put this solution on YOUR website!y int=5 (0,5) x int=-7 (-7,0)
 Quadratic_Equations/459979: For the following equation state the value of the discriminant and then describe the nature of the solutions 19x^2 +4x-13=0. What is the value of the discriminant and does it have one real solution two real solutions or two imaginary solutions?1 solutions Answer 315474 by rfer(12660)   on 2011-06-11 13:59:50 (Show Source): You can put this solution on YOUR website!D=1004 under the radical two real solutions
 Percentage-and-ratio-word-problems/459857: if something was worth \$ 4.3 but is now worth \$ 33., what is the percent increase?1 solutions Answer 315473 by rfer(12660)   on 2011-06-11 13:55:21 (Show Source): You can put this solution on YOUR website!33-4.3=28.7 28.7/4.3=6.67=667% increase