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# Recent problems solved by 'rfer'

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 Angles/413380: Which angle measure represents the complement of an angle whose measure is 84 degrees? 1 solutions Answer 290106 by rfer(12677)   on 2011-02-23 22:58:43 (Show Source): You can put this solution on YOUR website!90-84=6 degrees
 Linear-systems/413385: what is the answer of 75 divided by 2261 solutions Answer 290105 by rfer(12677)   on 2011-02-23 22:57:50 (Show Source): You can put this solution on YOUR website!75/226=0.332
 Equations/413388: 1/2x+2/3=1/61 solutions Answer 290104 by rfer(12677)   on 2011-02-23 22:56:44 (Show Source): You can put this solution on YOUR website!1/2x=1/6-4/6 1/2x=-3/6 x=-1/2*2/1 x=-2/2 x=-1
 percentage/413353: She draw line segment 2 7/8in long then she erased 1/2in how long is the line segment now?1 solutions Answer 290096 by rfer(12677)   on 2011-02-23 21:55:20 (Show Source): You can put this solution on YOUR website! 2 7/8-1/2 2 7/8-4/8=2 3/8
 Travel_Word_Problems/413354: find the average speed if distance = 220 miles and time = 4 hours1 solutions Answer 290095 by rfer(12677)   on 2011-02-23 21:53:41 (Show Source): You can put this solution on YOUR website!220/4=55 mph
 Rectangles/413357: points (1,5),(4,5)and (1,0) represent three coners of a rectangle:find the fourth coordinates of the point.1 solutions Answer 290094 by rfer(12677)   on 2011-02-23 21:52:32 (Show Source): You can put this solution on YOUR website!(5,0)
 Exponents/413291: 4r^-3 times 2r^21 solutions Answer 290093 by rfer(12677)   on 2011-02-23 21:50:50 (Show Source): You can put this solution on YOUR website!8r^-1
 Polynomials-and-rational-expressions/413280: how do you divide (4x^3 - 6x^2 + 7)/(2x + 3)1 solutions Answer 290092 by rfer(12677)   on 2011-02-23 21:46:21 (Show Source): You can put this solution on YOUR website!=2x^2 R of 7
 Linear-equations/413301: I need to graph linear equations and I have isolated "y" but then I am drawing a blank as to where to go from there. How do you find the solution sets for 4x+y=161 solutions Answer 290091 by rfer(12677)   on 2011-02-23 21:32:35 (Show Source): You can put this solution on YOUR website!y=-4x+16 y int = (0,16) slope m=-4 Does that help?
 Distributive-associative-commutative-properties/413309: May you please answer the question of (x-8)(x+1)1 solutions Answer 290090 by rfer(12677)   on 2011-02-23 21:29:40 (Show Source): You can put this solution on YOUR website!x^2+x-8x-8 x^2-7x-8
 Average/413312: Fill in the blank part of the factorization: -x - 10 = -1(_ + 10)1 solutions Answer 290089 by rfer(12677)   on 2011-02-23 21:27:55 (Show Source): You can put this solution on YOUR website!=-1(x+10)
 test/413337: How do u solve this: -(6-c)+3(2c-7)=1 1 solutions Answer 290088 by rfer(12677)   on 2011-02-23 21:24:44 (Show Source): You can put this solution on YOUR website!-6+c+6c-21=1 7c=28 c=4
 expressions/413327: Which of the following expressions is equal to 6 – 4(x + 3)?1 solutions Answer 290087 by rfer(12677)   on 2011-02-23 21:23:01 (Show Source): You can put this solution on YOUR website!6-4x-12 =-4x-6
 Exponents-negative-and-fractional/413273: Simplify each quotient. Write answer in scientific notation. (4.5*10^(-6))/(5*10^(-2))1 solutions Answer 290079 by rfer(12677)   on 2011-02-23 19:48:05 (Show Source): You can put this solution on YOUR website!=9X10^-5
 Inequalities/413253: What amount will an account have after 15 years if \$260 is invested at 10% interest compounded annually?1 solutions Answer 290076 by rfer(12677)   on 2011-02-23 19:40:05 (Show Source): You can put this solution on YOUR website!A=260(1.1)^15 A=260*4.1772 A=1086.00
 Numbers_Word_Problems/413115: Four more than seven times a number is the same as twenty less than three times a number. find the number 1 solutions Answer 290063 by rfer(12677)   on 2011-02-23 17:56:47 (Show Source): You can put this solution on YOUR website!7x+4=3x-20 4x=-24 x=-6 ---------- 7*-6+4=3*-6-20 -38=-38
 Equations/413203: 3(2x-2)-5=2x+4+x1 solutions Answer 290060 by rfer(12677)   on 2011-02-23 17:53:48 (Show Source): You can put this solution on YOUR website!6x-6-5=3x+4 3x=15 x=5
 Volume/413120: volume of a cylinder.diameter is 2. length 51 solutions Answer 290059 by rfer(12677)   on 2011-02-23 17:52:47 (Show Source): You can put this solution on YOUR website!V=pir^2h V=3.14*1*5 V=15.7 cu units
 Equations/413193: 6x+10-x=9+4x+7 x=1 solutions Answer 290056 by rfer(12677)   on 2011-02-23 17:45:09 (Show Source): You can put this solution on YOUR website!5x+10=4x+16 x=6
 Money_Word_Problems/413199: If you invest \$12,000 today, how much will you have in: 2 years @ 11% 1 solutions Answer 290055 by rfer(12677)   on 2011-02-23 17:43:58 (Show Source): You can put this solution on YOUR website!A=12000(1.11)^2 A=12000*1.2321 A=14,785.20
 Equations/413196: 0.9x-0.7x+5=21 solutions Answer 290052 by rfer(12677)   on 2011-02-23 17:42:25 (Show Source): You can put this solution on YOUR website!0.2x=-3 x=-15
 Probability-and-statistics/413144: Simplify 3{[7(x-2)+4]-[2(2x-5)+6]}1 solutions Answer 290050 by rfer(12677)   on 2011-02-23 17:40:49 (Show Source): You can put this solution on YOUR website!3(7x-14+4-4x+10-12) 3(3x-12) 9x-36
 Equations/413190: 1/5x+8=-4/5x+41 solutions Answer 290046 by rfer(12677)   on 2011-02-23 17:36:05 (Show Source): You can put this solution on YOUR website!5/5x=-4 x=-4
 Word_Problems_With_Coins/413186: There are 812 students in a school. There are 36 more girls than boys. How many girls are there?1 solutions Answer 290045 by rfer(12677)   on 2011-02-23 17:35:03 (Show Source): You can put this solution on YOUR website!x+x+36=812 2x=776 x=388 boys x+36=424 girls
 Reduction-of-unit-multipliers/413169: what is the probability of 6/27 to the nearest tenth of a percent1 solutions Answer 290044 by rfer(12677)   on 2011-02-23 17:33:15 (Show Source): You can put this solution on YOUR website!6/27=0.222=22.2%
 Money_Word_Problems/413172: What is the present value of: \$8,000 in 8 years at 8% 1 solutions Answer 290043 by rfer(12677)   on 2011-02-23 17:31:51 (Show Source): You can put this solution on YOUR website!A=8000(1+0.08)^8 A=8000*1.85 A=14,800
 Equations/413177: -x+3=23 x=1 solutions Answer 290041 by rfer(12677)   on 2011-02-23 17:29:44 (Show Source): You can put this solution on YOUR website!x=-20
 Linear_Equations_And_Systems_Word_Problems/413180: is 4x=8y a linear equation? 1 solutions Answer 290039 by rfer(12677)   on 2011-02-23 17:28:36 (Show Source): You can put this solution on YOUR website!yes
 expressions/413178: evaluate y^2-7 when y=-8 I am drawing a blank1 solutions Answer 290038 by rfer(12677)   on 2011-02-23 17:28:05 (Show Source): You can put this solution on YOUR website!-8^2-7= 64-7=57
 Angles/413173: The Measure of an angle is one-fifth of the measure of its complement. Find the measures of botha angles1 solutions Answer 290037 by rfer(12677)   on 2011-02-23 17:27:01 (Show Source): You can put this solution on YOUR website!x+4x=90 5x=90 x=18 4x=72
 Rational-functions/413139: How do you solve: (x-2)/x < (x-4)/(x-6)1 solutions Answer 290036 by rfer(12677)   on 2011-02-23 17:23:49 (Show Source): You can put this solution on YOUR website!(x-2)(x-6) < (x-4)(x) x^2-6x-2x+12 < x^2-4x -8x+12 < -4x 12 < 4x 3 < x