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# Recent problems solved by 'rfer'

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 Money_Word_Problems/717683: the interest on Rs3000 for one year is Rs210. what is the interest on Rs4500 for a year. 1 solutions Answer 440521 by rfer(12660)   on 2013-02-22 23:36:58 (Show Source): You can put this solution on YOUR website!3000/210=4500/x 3000x=945000 cancel zeros x=945/3 x=315
 Linear-equations/717770: my Question is on finding the slope intercept for slope 4/5,passing through (9,7)?1 solutions Answer 440520 by rfer(12660)   on 2013-02-22 23:34:28 (Show Source): You can put this solution on YOUR website!y=mx+b 7=4/5*9+b 7=7.2+b 7-7.2=b 0.2=b ------------ (0,0.2)
 Exponential-and-logarithmic-functions/717738: How much should be deposited in an account paying 2.5% interest, compounded quarterly, in order to have a balance of \$6000 after 32 years and 9 months?1 solutions Answer 440519 by rfer(12660)   on 2013-02-22 23:32:05 (Show Source): You can put this solution on YOUR website!6000=P(1+0.025/4)^4*32.75 6000=P(1.00625)^131 6000=P(2.2619) 6000/2.2619=P P=\$2652.64
 test/717766: Are you available now1 solutions Answer 440518 by rfer(12660)   on 2013-02-22 23:26:22 (Show Source): You can put this solution on YOUR website!yes
 Equations/717767: 2 + 7a - 5 - 4a and 3(4y + 2) - 2(3-y) Do I use a scientific calculator to work this out and if so can you explain how to get the answer. Thanks1 solutions Answer 440517 by rfer(12660)   on 2013-02-22 23:25:58 (Show Source): You can put this solution on YOUR website!A) =3a-3 B) 12y+6-6+2y=14y
 Polynomials-and-rational-expressions/717472: Can someone please simplify this expression with steps? Assume that all variables represent nonzero numbers. 6p^6 x 8p^8 1 solutions Answer 440323 by rfer(12660)   on 2013-02-22 01:01:08 (Show Source): You can put this solution on YOUR website!mutiply the numbers and add the exponents 48p^14
 Rational-functions/717499: (x-3)cubed1 solutions Answer 440322 by rfer(12660)   on 2013-02-22 00:59:27 (Show Source): You can put this solution on YOUR website!(x-3)(x-3)(x-3)= x^2-3x-3x+9 (x^2-6x+9)(x-3)= x^3-3x^2-6x^2+18x+9x-27= x^3-9x^2+27x-27
 Proportions/717493: Solve -x/3+2>81 solutions Answer 440321 by rfer(12660)   on 2013-02-22 00:55:42 (Show Source): You can put this solution on YOUR website!-x/3+2 > 8 -x/3 > 6 -x > 6*3 -x > 18 x < -18
 Polynomials-and-rational-expressions/717488: Use the formula for compond interest to find A A = P(l + r)^n P=\$300000,R = 0.12, AND N = 2 YEARS At the end of 2 years A is \$_1 solutions Answer 440318 by rfer(12660)   on 2013-02-22 00:52:43 (Show Source): You can put this solution on YOUR website!A=300000(1.12)^2 A=300000(1.2544) A=\$376,320.00
 Linear-systems/717492: Hi i need help on solving using substitution for two problems: x+y=1 2x+3y=-4 Please show all work thank you! 1 solutions Answer 440317 by rfer(12660)   on 2013-02-22 00:50:14 (Show Source): You can put this solution on YOUR website!y=-x+1 2x+3y=-4 2x+3(-x+1)=-4 2x-3x+3=-4 -x=-7 x=7 ----------- 2(7)+3y=-4 14+3y=-4 3y=-4-14 3y=-18 y=-18/3 y=-6 (7,-6) ------------- x+y=1 7-6=1
 Travel_Word_Problems/717507: how long will it take me to reach 3.96 kilometers if I'm going 4.8 kilometers per hour?1 solutions Answer 440315 by rfer(12660)   on 2013-02-22 00:45:44 (Show Source): You can put this solution on YOUR website!4.8/1=3.96/x 4.8x=3.96 x=3.96/4.8 x=0.825 hrs x=50 min
 Inequalities/717534: a salesperson has two job offers. Company A offers a weekly salary of \$630 plus commission of 14% of sales.Company B offers a weekly salary of \$1260 plus commission of 7% of sales. What is the amount of sales above which Company A's offer is the better of the two?1 solutions Answer 440314 by rfer(12660)   on 2013-02-22 00:41:29 (Show Source): You can put this solution on YOUR website!630+0.14x=1260+0.07x 0.07x=1260-630 0.07x=630 x=630/0.07 x=\$9000
 Inequalities/717527: x + 9 < 21 1 solutions Answer 440312 by rfer(12660)   on 2013-02-22 00:38:49 (Show Source): You can put this solution on YOUR website!x < 21-9 x < 12
 Numeric_Fractions/717533: 6 2/3 + (5 1/4-3 7/8)1 solutions Answer 440311 by rfer(12660)   on 2013-02-22 00:37:54 (Show Source): You can put this solution on YOUR website!20/3+21/4-31/8= 80/12+63/12-31/8= 143/12-31/8= 286/24-93/24=193/24=8 1/24
 Equations/717321: 0+50x1-60-60x0+10=1 solutions Answer 440207 by rfer(12660)   on 2013-02-21 18:07:06 (Show Source): You can put this solution on YOUR website!0+50-60-0+10=0
 test/717285: You ride your bike at an average of 12 miles per hour. You have already gone 13 miles. Your goal is to ride for 25 miles. How much longer do you need to ride to meet your goal? 1 solutions Answer 440206 by rfer(12660)   on 2013-02-21 18:04:40 (Show Source): You can put this solution on YOUR website!60/12=5 min per mi 5*13=65 min so far 25*5=125 min total 125-65=60 min or 1 hr to go
 Numbers_Word_Problems/717323: The sum of the two numbers is 62. The smaller number is 16 less than the larger number. What are the numbers?1 solutions Answer 440205 by rfer(12660)   on 2013-02-21 17:59:11 (Show Source): You can put this solution on YOUR website!x+x-16=62 2x=62+16 x=78/2 x=39 x-16=23
 test/717327: Warm-up: David weighs one-and-a-half times as much as Maddie. Together they weigh 250 pounds. Find David and Maddie’s weights.1 solutions Answer 440204 by rfer(12660)   on 2013-02-21 17:56:47 (Show Source): You can put this solution on YOUR website!1.5x+x=250 2.5x=250 x=250/2.5 x=100 lbs Maddie 1.5x=150 lbs David
 test/717330: You plan to drive to the beach for a vacation. You estimate that you will travel 200 miles total at an average speed 55 per hour. You have already been driving for 1 hour. About how much more time will it take you to get to the beach? 1 solutions Answer 440203 by rfer(12660)   on 2013-02-21 17:53:07 (Show Source): You can put this solution on YOUR website!200/55-1=2.6 hrs=2 hrs 36 min
 test/716980: All right angles are 1 solutions Answer 440049 by rfer(12660)   on 2013-02-20 21:27:07 (Show Source): You can put this solution on YOUR website!90 degrees
 Equations/716981: what is the y-intercept of the following equation Y=14x-51 solutions Answer 440048 by rfer(12660)   on 2013-02-20 21:26:39 (Show Source): You can put this solution on YOUR website!=-5 (0,-5)
 Quadratic_Equations/716913: whats the solution for (x+2)(-3)=24 when you FOIL1 solutions Answer 440047 by rfer(12660)   on 2013-02-20 21:25:13 (Show Source): You can put this solution on YOUR website!-3x-6=24 -3x=24+6 x=30/-3 x=-10
 Travel_Word_Problems/716940: A hiker travels 30 miles in 8 hours . How fast was he going ? 1 solutions Answer 440046 by rfer(12660)   on 2013-02-20 21:22:50 (Show Source): You can put this solution on YOUR website!30/8=3.75 mph
 Equations/716927: How do you do a problem like this: X+1/8x=54?1 solutions Answer 440044 by rfer(12660)   on 2013-02-20 21:21:33 (Show Source): You can put this solution on YOUR website!1 1/8x=54 1.125x=54 x=54/1.125 x=48
 Numeric_Fractions/716934: 12 + 2{16 - (10 - 8)} need help on this problem 1 solutions Answer 440043 by rfer(12660)   on 2013-02-20 21:19:25 (Show Source): You can put this solution on YOUR website!12+2{16-2} 12+2(14) 12+28=40
 Money_Word_Problems/716941: mr black bought a television set for \$450.00. He later sold the television set at a loss of 30%. calculate the amount of the loss.1 solutions Answer 440042 by rfer(12660)   on 2013-02-20 21:17:09 (Show Source): You can put this solution on YOUR website!450*0.30=\$135.00
 Average/716948: A discount on a new copier is \$210. This was a 15% discount. What was the original price? 1 solutions Answer 440040 by rfer(12660)   on 2013-02-20 21:14:56 (Show Source): You can put this solution on YOUR website!210/0.15=\$1400.00
 Rectangles/716959: if the perimeter of a rectangle is 400 cm and the ratio of width to length is 9 to 11 what are the deminsions of the rectangle1 solutions Answer 440038 by rfer(12660)   on 2013-02-20 21:13:05 (Show Source): You can put this solution on YOUR website!400=2(9x)+2(11x) 400=18x+22x 400=40x 400/40=x x=10 9x=90 W 11x=110 L
 Money_Word_Problems/716964: If you deposited \$2500 at 5% for 6 years compounded annually, what is you total amount? What is your interest amount?1 solutions Answer 440036 by rfer(12660)   on 2013-02-20 21:09:45 (Show Source): You can put this solution on YOUR website!FV=2500(1.05)^6 FV=\$3350.24 interest 3350.24-2500=\$850.24
 Money_Word_Problems/716966: How much was deposited if the simple interest earned after 120 days at 3.5% was \$52.50?1 solutions Answer 440034 by rfer(12660)   on 2013-02-20 21:07:04 (Show Source): You can put this solution on YOUR website!I=Prt 52.50=P*0.035*120/365 52.50/0.0115=P P=\$4565.22
 Numeric_Fractions/716614: 2/5 + 3/5=1 solutions Answer 439934 by rfer(12660)   on 2013-02-20 10:59:00 (Show Source): You can put this solution on YOUR website!=5/5=1