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# Recent problems solved by 'rfer'

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 Mixture_Word_Problems/407392: Patrick is selling his house through a real estate agent whose commission is 6% of the selling price. What should be the selling price so that Patrick can get \$84,600?1 solutions Answer 287222 by rfer(12644)   on 2011-02-10 15:01:11 (Show Source): You can put this solution on YOUR website!84600/.94=90,000
 Money_Word_Problems/407302: Please help! How much interest would Tamara earn, if she invest \$850.00 at 6% simple interest for two years?1 solutions Answer 287219 by rfer(12644)   on 2011-02-10 14:57:50 (Show Source): You can put this solution on YOUR website!I=P*r*t I=850*0.06*2 I=102
 Numeric_Fractions/407329: I'm not sure I ma doing this right. problem: (3/4)x*-1=1/2 I think i need to get the x by itself, so I would take the 3/4 and multiply it by 4/3, causing me to cancel it out. Leaving me with x-1=1/2. so then it's 1/1*1/2=1/2 so x=1/2? Is that right? I feel like I am missing something here.1 solutions Answer 287216 by rfer(12644)   on 2011-02-10 14:54:51 (Show Source): You can put this solution on YOUR website!3/4x*-1=1/2 3/4x=1/2*-1/1 3/4x=-1/2 x=-1/2*4/3 x=-4/6 x=-2/3
 Divisibility_and_Prime_Numbers/407375: I am learning prime factored form and i dont undersand it , i know its simple but how do i find it? the problem I just did was the prime factored form of 45.... myanswer was 45=5x9 is that correct ? but now i am stuck on 78 how do i do it????? please help me.1 solutions Answer 287187 by rfer(12644)   on 2011-02-10 14:08:32 (Show Source): You can put this solution on YOUR website!On your first question 9 is not a prime factor, 9 fators to 3X3 answer is 5 X 3 X 3 Second question 78 2 X 39 the 2 is prime, so it just comes down and we factor 39 2 X 3 X 13
 Expressions-with-variables/406985: How to translate two-thirds of a number into a variable expression?1 solutions Answer 287016 by rfer(12644)   on 2011-02-09 20:01:54 (Show Source): You can put this solution on YOUR website!2/3x
 Miscellaneous_Word_Problems/406997: burts burger barn sold 495 hamburgers today. The number sold with cheese was half the number sold without cheese. How many of each kind was sold 1 solutions Answer 287014 by rfer(12644)   on 2011-02-09 20:00:58 (Show Source): You can put this solution on YOUR website!495/3=165 w cheese 330 wo cheese
 Percentage-and-ratio-word-problems/406998: I have 3 1/3 bags of peanuts and i want to give 1/3 bag each to 15 people. Do I have enough peanuts? Can you please show me how you got the answer. Thank you1 solutions Answer 287010 by rfer(12644)   on 2011-02-09 19:59:17 (Show Source): You can put this solution on YOUR website!make in improper fraction 3 1/3 = 10/3 not enough, you need 15/3
 test/406965: find the slope of each line. 2x-5y=01 solutions Answer 287004 by rfer(12644)   on 2011-02-09 19:32:55 (Show Source): You can put this solution on YOUR website!-5y=-2x+0 y=2/5x slope m=2/5
 expressions/406869: 4(8-3w)=32-8(w+2)1 solutions Answer 286996 by rfer(12644)   on 2011-02-09 18:03:23 (Show Source): You can put this solution on YOUR website!32-12w=32-8w-16 -4w=-16 w=4
 Equations/406887: three fewer than 8 times a number is 59 what is the number1 solutions Answer 286995 by rfer(12644)   on 2011-02-09 18:01:23 (Show Source): You can put this solution on YOUR website!8x-3=59 8x=62 x=7.75
 Finance/406890: I AM GETTING -.2004 FOR THE FOLLOWING EQUATION... IS THIS CORRECT? L= (gt/p(1-d)(1+g))-1 L= (.1976*1.3289/.2001(1-.4912)(1+.1976))-11 solutions Answer 286994 by rfer(12644)   on 2011-02-09 17:58:32 (Show Source): You can put this solution on YOUR website!That is what I got also. Good luck. Bob
 Linear-equations/406902: 7x+8=11 solutions Answer 286993 by rfer(12644)   on 2011-02-09 17:53:30 (Show Source): You can put this solution on YOUR website!7x=-7 x=-1
 Miscellaneous_Word_Problems/406909: becky put 9,000 in a savings account at the end of 9 years, the account had earned \$5,265 in interest. At what annual simple interestrate did the account grow?1 solutions Answer 286992 by rfer(12644)   on 2011-02-09 17:52:55 (Show Source): You can put this solution on YOUR website!5265/9=585 per yr 585/9000=0.065=6.5%
 Money_Word_Problems/406725: Phyllis invested \$12,000, a portion earning a simple interest rate of 4 and 1/2% per year and the rest earning a rate of 4% per year. After one year the total interest earned on these investments was \$525. How much money did she invest at each rate?1 solutions Answer 286941 by rfer(12644)   on 2011-02-09 13:51:20 (Show Source): You can put this solution on YOUR website!0.045x+0.04(12000-x)=525 0.045x+480-0.04x=525 0.005x=45 x=9000 at 4.5% 12000-x=3000 at 4%
 Linear-equations/406769: A river drops 4 feet over a horizontal distance of 97 feet. Find the slope of this part of the river. Round your answer to two decimal places. 1 solutions Answer 286939 by rfer(12644)   on 2011-02-09 13:47:56 (Show Source): You can put this solution on YOUR website!-4/97=-0.04
 Graphs/406773: ok that helped just a little more help write an equation in slope intercept form for each line through (-4,1) with slope 1/2 and slope 2, y intercept (0,3) thanks for the help i apperciate it1 solutions Answer 286937 by rfer(12644)   on 2011-02-09 13:46:05 (Show Source): You can put this solution on YOUR website!1) 1=.5*-4+b 1=-2+b b=3 ---------------- y=1/2x+3 ----------- 2) y=2x+3
 Angles/406775: Find the supplementary angles of the following : 23.71 solutions Answer 286935 by rfer(12644)   on 2011-02-09 13:43:38 (Show Source): You can put this solution on YOUR website!180-23.7=156.3 degrees
 test/406745: What is 22% of 60?1 solutions Answer 286930 by rfer(12644)   on 2011-02-09 13:18:20 (Show Source): You can put this solution on YOUR website!60*0.22=13.2
 Linear-systems/406522: There are 1712 students at Fitch. There are 72 more girls than boys. How many girls are there?1 solutions Answer 286847 by rfer(12644)   on 2011-02-08 22:56:37 (Show Source): You can put this solution on YOUR website!x+x+72=1712 2x=1640 x=820 boys x+72=892 girls
 Proportions/406531: In a bag of M&M's the ratio of red candies to green candies is 5:4. If there are 378 red and green candies, how many are red?1 solutions Answer 286845 by rfer(12644)   on 2011-02-08 22:53:39 (Show Source): You can put this solution on YOUR website!5x+4x=378 9x=378 x=42 5x=210 red
 Quadratic_Equations/406579: x + 5 = -17 1 solutions Answer 286843 by rfer(12644)   on 2011-02-08 22:51:03 (Show Source): You can put this solution on YOUR website!x=-22
 Percentage-and-ratio-word-problems/406555: The ratio of boys to girls in a class is 5 to 6. If there are 90 girls how many boys are there?1 solutions Answer 286842 by rfer(12644)   on 2011-02-08 22:50:36 (Show Source): You can put this solution on YOUR website!5/6=x/90 6x=450 x=75 boys
 Probability-and-statistics/406564: a student has the following grades on a math test. 65%, 90%, 85%. What is the highest possible average the student can receive if there will be one more test, and all four tests count equality?1 solutions Answer 286839 by rfer(12644)   on 2011-02-08 22:48:52 (Show Source): You can put this solution on YOUR website!(.65+.90+.85+1)/4=0.85=85%
 Quadratic_Equations/406577: Can you help with problem please. 9y + 2 = 20 1 solutions Answer 286837 by rfer(12644)   on 2011-02-08 22:46:15 (Show Source): You can put this solution on YOUR website!9y=18 y=2
 Travel_Word_Problems/406456: Jan ran 988 miles this year. If she ran the same # miles each week, what is the # of miles run each week? 1 solutions Answer 286792 by rfer(12644)   on 2011-02-08 19:37:45 (Show Source): You can put this solution on YOUR website!988/52=19 mi per wk
 Equations/406430: Solve: 1+4x=4x+1. If possible. 1 solutions Answer 286791 by rfer(12644)   on 2011-02-08 19:36:47 (Show Source): You can put this solution on YOUR website!0=0 no solution
 Equations/406434: solve: 2(4y-1)+2y=3 If possible1 solutions Answer 286789 by rfer(12644)   on 2011-02-08 19:34:56 (Show Source): You can put this solution on YOUR website!8y-2+2y=3 10y=5 y=5/10 y=1/2
 Graphs/406442: x/-5+6 is greater than or equal to -11 solutions Answer 286788 by rfer(12644)   on 2011-02-08 19:33:31 (Show Source): You can put this solution on YOUR website!x/-5+6 =>-1 x/-5 =-7 x => -7*-5 x => 35
 Linear_Equations_And_Systems_Word_Problems/406418: Luke has 5\$ more than sam. Together they have \$73. How much money does each boy have?1 solutions Answer 286784 by rfer(12644)   on 2011-02-08 18:57:42 (Show Source): You can put this solution on YOUR website!x+x+5=73 2x=68 x=34 x+5=39
 Distributive-associative-commutative-properties/406366: Can you help my understand this proble? F(x) = x to the second power + 5x - 1 x=3 1 solutions Answer 286783 by rfer(12644)   on 2011-02-08 18:56:47 (Show Source): You can put this solution on YOUR website!f(x)=x^2+5x-1 (x=3) f(3)=3^2+5*3-1 f(3)=23
 Polynomials-and-rational-expressions/406365: what is the answer of (4x-3)(2x-3)1 solutions Answer 286782 by rfer(12644)   on 2011-02-08 18:53:56 (Show Source): You can put this solution on YOUR website!8x^2-4x-6x+9 8x^2-10x+9