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# Recent problems solved by 'rfer'

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 expressions/715210: i need to simplify this expression and i don't know how please explain how you got the answers... 4(w+4)+6(4+2w) another expression... 5^2 divided by (9+2)+12 divided by 4-2^2 thanks so much!1 solutions Answer 439292 by rfer(12678)   on 2013-02-16 19:57:53 (Show Source): You can put this solution on YOUR website!4w+16+24+12w= 16w+40 ----------- 5^2/11+12/4-2^2 25/11+3-4 2.272-1=1.272
 percentage/715128: You buy a big-screen TV for \$2,040, which is 15% off the original price. What was the original price?1 solutions Answer 439291 by rfer(12678)   on 2013-02-16 19:53:27 (Show Source): You can put this solution on YOUR website!2040/0.85=\$2400
 percentage/715129: A manufacturer employs 294 part-time workers. This is 30% of their employees. What is their total employee count?1 solutions Answer 439288 by rfer(12678)   on 2013-02-16 19:49:16 (Show Source): You can put this solution on YOUR website!294/0.30=980
 Polynomials-and-rational-expressions/715209: Write polynomial as the products of two binomials: y(y+2) + 3(y+2)1 solutions Answer 439285 by rfer(12678)   on 2013-02-16 19:47:03 (Show Source): You can put this solution on YOUR website!y^2+2y+3y+6= y^2+5y+6
 �t�e�s�t/715136: add and simplfy 13/18x + 7/24x1 solutions Answer 439284 by rfer(12678)   on 2013-02-16 19:46:05 (Show Source): You can put this solution on YOUR website!52/72x+21/72x=73/72x
 Distributive-associative-commutative-properties/714974: 6(7x-2)-2(x-4)1 solutions Answer 439132 by rfer(12678)   on 2013-02-15 21:15:01 (Show Source): You can put this solution on YOUR website!42x-12-2x+8= 40x-4
 Equations/714421: a. Simplify this algebraic expression: 5xy - 3yz - 5xz + yz - 4xz + 7xy 1 solutions Answer 438795 by rfer(12678)   on 2013-02-14 00:54:23 (Show Source): You can put this solution on YOUR website!12xy-2yz-9xz
 Polynomials-and-rational-expressions/714305: what is the answer to 5m+4-m=20?1 solutions Answer 438756 by rfer(12678)   on 2013-02-13 19:56:30 (Show Source): You can put this solution on YOUR website!4m=16 m=16/4 m=4
 Equations/714251: They need 1 1/2 cups of sugar. How many 1/4 cups should they measure?1 solutions Answer 438755 by rfer(12678)   on 2013-02-13 19:55:39 (Show Source): You can put this solution on YOUR website!=6
 Inequalities/714056: im confused with these. kindly answer it 2n-3 (n+3) is less than or equal to 14 thanks!1 solutions Answer 438687 by rfer(12678)   on 2013-02-13 12:19:39 (Show Source): You can put this solution on YOUR website!2n-3(n+3) <= 14 2n-3n+9 <= 14 -n <= 14-9 -n <= 5 n >= -5
 Graphs/714057: Find the slope of the line that passes through the pair of points. (2, 6), (7, 0)1 solutions Answer 438686 by rfer(12678)   on 2013-02-13 12:16:58 (Show Source): You can put this solution on YOUR website!slope m=(0-6)/(7-2) m=-6/5
 Angles/714113: The measure of the first angle of a triangle is four times as large as the measure of the second angle. The third angle measures 15 degrees less than twice the first angle. Find the measures of the angles.1 solutions Answer 438685 by rfer(12678)   on 2013-02-13 12:14:37 (Show Source): You can put this solution on YOUR website!4x+x+2(4x)-15=180 4x+x+8x-15=180 13x=195 x=195/13 x=15 4x=60 2(4x)-15=105
 Matrices-and-determiminant/714069: Can you solve 4x - 3y = 5 and -2x + y = -31 solutions Answer 438683 by rfer(12678)   on 2013-02-13 12:10:52 (Show Source): You can put this solution on YOUR website!y=2x-3 4x-3y=5 4x-3(2x-3)=5 4x-6x+9=5 -2x=-4 x=2 --------------- 4*2-3y=5 8-3y=5 -3y=-3 y=-3/-3 y=1 ----------- (2,1) -------------- -2*2+1=-3 -3=-3
 Linear_Equations_And_Systems_Word_Problems/714077: A vending machine sells chips at 0.40 and candy at 0.50 Last month the vending machine yield 139.80 with the sale of 298 items How many packages of chips were purchased last month1 solutions Answer 438681 by rfer(12678)   on 2013-02-13 12:06:30 (Show Source): You can put this solution on YOUR website!x=chips y=candy ------------ x+y=298 x=298-y ------------- 0.40x+0.50y=139.80 0.40(298-y)+0.50y=139.80 119.2-0.40y+0.50y=139.80 0.10y=139.80-119.2 0.10y=20.6 y=20.6/0.10 y=206 candy x=298-206 x=92 chips
 Money_Word_Problems/714090: 27,500 is the present price which is 10% increase of previous price. How much was the previous price?1 solutions Answer 438680 by rfer(12678)   on 2013-02-13 11:59:11 (Show Source): You can put this solution on YOUR website!27500/1.10=25000
 Travel_Word_Problems/714103: At a speed of 35km an hour, car takes 5 hrs for a journey, how long will it take at a speed of 45 km per hr to complete the journey1 solutions Answer 438679 by rfer(12678)   on 2013-02-13 11:56:34 (Show Source): You can put this solution on YOUR website!35*5=175 mi 175/45=3.9 hrs
 Inequalities/713982: Please help me solve this equation: (2x + 6) + 10 = 26 1 solutions Answer 438626 by rfer(12678)   on 2013-02-12 22:41:49 (Show Source): You can put this solution on YOUR website!2x+6+10=26 2x+16=26 2x=26-16 2x=10 x=10/2 x=5
 Numeric_Fractions/713964: what's the answer to 5n+7=7(n+1)-41 solutions Answer 438624 by rfer(12678)   on 2013-02-12 22:38:15 (Show Source): You can put this solution on YOUR website!5n+7=7n+7-4 -2n=-4 n=-4/-2 n=2
 Equations/713969: How do I solve this 7/8h-5/8=2 1 solutions Answer 438622 by rfer(12678)   on 2013-02-12 22:36:25 (Show Source): You can put this solution on YOUR website!7/8h=2+5/8 7/8h=16/8+5/8 7/8h=21/8 h=(21/8)/(7/8) h=21/8*8/7 h=21/7 h=3
 test/713974: I have m=6/7 and (1,-8) How do u get to y=6/7x-62/71 solutions Answer 438621 by rfer(12678)   on 2013-02-12 22:33:18 (Show Source): You can put this solution on YOUR website!y=mx+b -8=6/7*1+b -8=6/7+b -8-6/7=b -62/7=b -------------- y=6/7x-62/7
 Exponents/713976: what is (3g) to the 3rd power 1 solutions Answer 438620 by rfer(12678)   on 2013-02-12 22:30:18 (Show Source): You can put this solution on YOUR website!(3g)^3=27g^3
 Travel_Word_Problems/713794: A pigeon can fly at a speed of 84 kilometers per hour. How long does it take the pigeon to fly 7 kilometers?1 solutions Answer 438574 by rfer(12678)   on 2013-02-12 18:13:50 (Show Source): You can put this solution on YOUR website!84/1=7/x 84x=7 x=7/84 x=5 minutes
 Graphs/713818: how do you graph y = 3/4x -21 solutions Answer 438573 by rfer(12678)   on 2013-02-12 18:11:39 (Show Source): You can put this solution on YOUR website!slope m=3/4 y int=-2 (0,-2) (4,1) (8,4)
 Numeric_Fractions/713817: v-9= -101/101 solutions Answer 438571 by rfer(12678)   on 2013-02-12 18:09:30 (Show Source): You can put this solution on YOUR website!v=-101/10+90/10 v=-11/10=-1 1/10
 Numeric_Fractions/713825: i need help solving 2 3/8+7/121 solutions Answer 438570 by rfer(12678)   on 2013-02-12 18:07:45 (Show Source): You can put this solution on YOUR website!57/24+14/271/24=2 23/24
 Numeric_Fractions/713500: How do I make -6 5/8 into an improper fraction?1 solutions Answer 438472 by rfer(12678)   on 2013-02-12 00:12:00 (Show Source): You can put this solution on YOUR website!=-53/8
 Equations/713398: There are 500 gumballs. Julian has twice as many as damian plus 20 more. How much do they each have?1 solutions Answer 438412 by rfer(12678)   on 2013-02-11 20:00:32 (Show Source): You can put this solution on YOUR website!x+2x+20=500 3x=480 x=480/3 x=160 Damian 2x+20=340 Julian
 Money_Word_Problems/713396: Jenny invested \$300 in an account where her money doubles every 7 years. How much money will be in her account at the end of 35 years? 1 solutions Answer 438410 by rfer(12678)   on 2013-02-11 19:57:37 (Show Source): You can put this solution on YOUR website!FV=300(1.10)^35 FV=300*28.1 FV=\$8,430.00
 Numbers_Word_Problems/713232: five times a number decreased by 18 minus 4 times the same number is -361 solutions Answer 438350 by rfer(12678)   on 2013-02-11 16:25:22 (Show Source): You can put this solution on YOUR website!5x-18-4x=-36 x=-18
 Numbers_Word_Problems/713254: Four times a number plus five is the same as six times the number less nine. Find the number.1 solutions Answer 438348 by rfer(12678)   on 2013-02-11 16:21:09 (Show Source): You can put this solution on YOUR website!4x+5=6x-9 -2x=-14 x=7
 Polynomials-and-rational-expressions/713268: -3(x+4)-5(x-4) 9/16-3/8+1/4 2(x-7)-5=5-(3-2x)1 solutions Answer 438347 by rfer(12678)   on 2013-02-11 16:18:25 (Show Source): You can put this solution on YOUR website!-3x-12-5x+20= -8x+8 --------------- 9/16-6/16+4/16=7/16 ------------------ 2x-14-5=5-3+2x=21