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# Recent problems solved by 'rfer'

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 Proportions/508077: what is the fraction notation for the ratio of 8640 to 144001 solutions Answer 340853 by rfer(12660)   on 2011-10-02 17:52:26 (Show Source): You can put this solution on YOUR website!=3/5
 Numbers_Word_Problems/508013: The product of 5 and Y is greater thank or equal to the difference of Y and 161 solutions Answer 340837 by rfer(12660)   on 2011-10-02 16:12:54 (Show Source): You can put this solution on YOUR website!5y >= y-16 4y >= -16 y >= -16/4 y >= -4
 Circles/507993: Find the exact and approsimate circumference and area of the given circle. Diameter of circle is 14 m. 1 solutions Answer 340835 by rfer(12660)   on 2011-10-02 16:10:59 (Show Source): You can put this solution on YOUR website!c=3.14*14 c=43.96 m --------- a=3.14*r^2 a=3.14*7^2 a=153.86 m
 Percentage-and-ratio-word-problems/508008: An appliance store advertises 10% off all of its dishwashers. You paid \$576.00 for the dishwasher. FInd its original price.1 solutions Answer 340833 by rfer(12660)   on 2011-10-02 16:08:04 (Show Source): You can put this solution on YOUR website!576/0.9=\$640
 Numbers_Word_Problems/507994: the algebraic expression 30 minus a number h1 solutions Answer 340832 by rfer(12660)   on 2011-10-02 16:07:01 (Show Source): You can put this solution on YOUR website!=30-h
 Linear-equations/508006: write an equation of the line containing the specified point and parallel to the indicated line (0,-5) y= 4x+31 solutions Answer 340831 by rfer(12660)   on 2011-10-02 16:04:48 (Show Source): You can put this solution on YOUR website!y=mx+b -5=4*0+b b=-5 --------- y=4x-5
 Money_Word_Problems/507996: A man bought 50 thousand Australian Dollars in January 2007 at A\$1 = S\$1.2789 and put it in a bank that pays a compound interest of 7.6% per annum compounded every 3 months. a. How much A\$ will he have in the bank account in January 2007 ? My answer :: A = 50000(1+7.6/400)^8 A= A\$ 58125.07 b. He exchanged all the A\$ into S\$ in January 2009 at the rate of A\$1 = S\$0.9876. Calculate the amount gain/loss for the investment, giving your answer in S\$ correct to the nearest 50 cents. I can't get part b correctly. I've tried to convert both AS\$50k and A\$58125.07 into S\$ using both rate in Jan 2007 and 2009. But I still can't get it correctly. Please help me :)1 solutions Answer 340830 by rfer(12660)   on 2011-10-02 16:03:07 (Show Source): You can put this solution on YOUR website!A=50000(1+0.076/4)^8 A=50000(1.019)^8 A=5000*1.1625 A=58,125.07 (A\$) ------------- 58125.07/0.9876=58,854.80 (\$US)
 decimal-numbers/505951: if 3 times a number is increased 0.2, the result is 23. Find the number.1 solutions Answer 340040 by rfer(12660)   on 2011-09-28 12:46:43 (Show Source): You can put this solution on YOUR website!3x+0.2=23 3x=23-0.2 3x=22.8 x=22.8/3 x=7.6
 Percentage-and-ratio-word-problems/505973: you are asked to administer 85 mg of Lidocaine. Lidocaine is packaged 25 mg in 5 ml. how many ML do you administer? show work1 solutions Answer 340039 by rfer(12660)   on 2011-09-28 12:45:06 (Show Source): You can put this solution on YOUR website!83/25=3.32 3.32*5=16.6 ml
 Percentage-and-ratio-word-problems/505975: aspirin are provided in 60 mg tablets. you need to give your patient 240 mg. how many tablets do you give? show work1 solutions Answer 340038 by rfer(12660)   on 2011-09-28 12:43:24 (Show Source): You can put this solution on YOUR website!240/60=4 aspirin
 Numeric_Fractions/505907: How do I simplify [8(7-20-4]-[9-(9-8)]1 solutions Answer 340037 by rfer(12660)   on 2011-09-28 12:42:24 (Show Source): You can put this solution on YOUR website![8*-17]-[9-1] -136-1=-137
 Percentage-and-ratio-word-problems/505971: DETERMINE IF THE FOLLOWING PROPORTION IS EQUAL (SHOW WORK) 4/8=8/161 solutions Answer 340036 by rfer(12660)   on 2011-09-28 12:38:50 (Show Source): You can put this solution on YOUR website!4/8=1/2 8/16=1/2 1/2=1/2
 Percentage-and-ratio-word-problems/505972: solve for a missing component in the following 48/x = 120/10 (show work)1 solutions Answer 340035 by rfer(12660)   on 2011-09-28 12:37:57 (Show Source): You can put this solution on YOUR website!120x=48*10 120x=480 x=480/120 x=4
 Age_Word_Problems/505945: one apple cost 8 \$ how many apple can be purchase in 50 \$1 solutions Answer 340034 by rfer(12660)   on 2011-09-28 12:36:57 (Show Source): You can put this solution on YOUR website!50/8=6.25 answer=6 apples can by a part of an apple.
 Polynomials-and-rational-expressions/505952: 1. Factor out the greatest common factor from the expression 15x^5-9x^4 may I please get some help with this problem please.1 solutions Answer 340033 by rfer(12660)   on 2011-09-28 12:35:00 (Show Source): You can put this solution on YOUR website!=3x^4(5x-3)
 Polynomials-and-rational-expressions/505957: 6. Factor the expression into a product of binomials. 49x^2-42xy+9y^2 I don't know how to do this please help.1 solutions Answer 340032 by rfer(12660)   on 2011-09-28 12:32:43 (Show Source): You can put this solution on YOUR website!=(7x-3y)(7x-3y)
 Polynomials-and-rational-expressions/505966: 9. Factor the following expression completely: 45x^3y – 80xy can someone assist me with this?1 solutions Answer 340031 by rfer(12660)   on 2011-09-28 12:29:54 (Show Source): You can put this solution on YOUR website!=5xy(3x+4)(3x-4)
 Money_Word_Problems/505931: round 5.5% of \$60 to the nearest centh1 solutions Answer 340030 by rfer(12660)   on 2011-09-28 12:26:55 (Show Source): You can put this solution on YOUR website!60*0.055=3.3=\$3.30
 test/505947: 3/4y = 2/3y + 51 solutions Answer 340029 by rfer(12660)   on 2011-09-28 12:25:35 (Show Source): You can put this solution on YOUR website!9/12y-8/12y=5 1/12y=5 y=5/(1/12) y=5*12/1 y=60/1 y=60
 Linear-equations/505962: Find the x- and y- intercepts of -2x+4y=8. Use these intercepts to graph the line.1 solutions Answer 340028 by rfer(12660)   on 2011-09-28 12:23:02 (Show Source): You can put this solution on YOUR website!First put in slope intercept form. y=mx+b 4y=2x+8 y=2/4x+8/4 y=2/4x+2 -------------- slope m=2/4 y int b=2
 Expressions-with-variables/505736: simplify the expression -43 + (-21)1 solutions Answer 339975 by rfer(12660)   on 2011-09-27 23:14:05 (Show Source): You can put this solution on YOUR website!=-64
 Linear-systems/505775: How would I figure out: Find an equation for a line with the given properties: Equation for a line parallel to y= -2x containing the point (7,8) thank you!1 solutions Answer 339974 by rfer(12660)   on 2011-09-27 23:12:30 (Show Source): You can put this solution on YOUR website!8=-2*7+b 8=-14+b 8+14=b b=22 ----------- y=-2x+22
 Expressions-with-variables/505784: I need some help on this question,-8x+8=-6(2x+2)?1 solutions Answer 339971 by rfer(12660)   on 2011-09-27 23:09:38 (Show Source): You can put this solution on YOUR website!-8x+8=-12x-12 -8x+12x=-12-8 4x=-20 x=-20/4 x=-5
 Linear-equations/505790: what is the slope y=2x-2 1 solutions Answer 339969 by rfer(12660)   on 2011-09-27 23:07:15 (Show Source): You can put this solution on YOUR website!y=mx+b m=slope m=2
 Polynomials-and-rational-expressions/505361: 7(x+6)1 solutions Answer 339880 by rfer(12660)   on 2011-09-27 16:23:37 (Show Source): You can put this solution on YOUR website!7x+42
 absolute-value/505418: (-12)+4+(1/3)-(2/3) is equal to1 solutions Answer 339879 by rfer(12660)   on 2011-09-27 16:22:05 (Show Source): You can put this solution on YOUR website!-8-1/3 -24/3-1/3=-25/3=-8 1/3
 Expressions-with-variables/505369: how to solve this prolem 35mi/hr to ft/min1 solutions Answer 339878 by rfer(12660)   on 2011-09-27 16:19:58 (Show Source): You can put this solution on YOUR website!35/60=0.583 miles per min 5280 ft per mi 5280*0.583=3078.24 ft per min
 Equations/505387: 23b+9=4b+66 what dose b equal 1 solutions Answer 339874 by rfer(12660)   on 2011-09-27 16:13:26 (Show Source): You can put this solution on YOUR website!19b=66-9 19b=57 b=57/19 b=3
 Numbers_Word_Problems/504759: The sum of two numbers is 28. One number is three time the other. Find the numbers.1 solutions Answer 339715 by rfer(12660)   on 2011-09-26 17:43:22 (Show Source): You can put this solution on YOUR website!x+3x=28 4x=28 x=28/4 x=7 3x=21
 Numeric_Fractions/504818: -5/6=-3/4-1/2x1 solutions Answer 339714 by rfer(12660)   on 2011-09-26 17:42:02 (Show Source): You can put this solution on YOUR website!-5/6+3/4=-1/2x find common denominators then solve -20/24+18/24=-1/2x -2/18=-1/2x -1/9=-1/2x (-1/9)/(-1/2)=x x=-1/9*-2/1 x=2/9
 Expressions-with-variables/504758: How do I work out the probelm x over 36 = 1 over 18? I know I need to cross multiply but I need to understand the steps to get the answer. Thank you, Sarah1 solutions Answer 339713 by rfer(12660)   on 2011-09-26 17:38:09 (Show Source): You can put this solution on YOUR website!you are working a ratio. What one value is to another. x/36=1/18 18x=36*1 x=36/18 x=2 This makes since. 36 is double 18 and 2 is double 1 Does that help? Bob