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# Recent problems solved by 'rfer'

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 Coordinate-system/411657: where is 5/4 on a grid1 solutions Answer 289322 by rfer(12654)   on 2011-02-20 15:36:38 (Show Source): You can put this solution on YOUR website!Is this a y value , an X value or the slope?
 Money_Word_Problems/411696: what is the interest of 4,300 for a 12 months at 4.6%1 solutions Answer 289321 by rfer(12654)   on 2011-02-20 15:34:14 (Show Source): You can put this solution on YOUR website!I=P*r I=4300*0.046 I=198.80
 Functions/411709: y=0.15x+0.79 what is the y-intercept? 1 solutions Answer 289320 by rfer(12654)   on 2011-02-20 15:32:26 (Show Source): You can put this solution on YOUR website!y int = 0.79
 Numeric_Fractions/411694: (-2/3-7/3)(1/3-9/10) I need help by seeing how this is worked out1 solutions Answer 289319 by rfer(12654)   on 2011-02-20 15:31:23 (Show Source): You can put this solution on YOUR website!first, find common denominator (-2/3-7/3)(10/30-27/30) (-9/3)(-17/30)=153/90=1 7/10
 Parallelograms/411698: 6x-8=4x-21 solutions Answer 289317 by rfer(12654)   on 2011-02-20 15:26:59 (Show Source): You can put this solution on YOUR website!2x=6 x=3
 Linear-equations/411467: I am having trouble solving this problem for "slope intercept form" 5y=6x I know the form is y =mx+b but can't get this one figured out?1 solutions Answer 289226 by rfer(12654)   on 2011-02-19 20:44:29 (Show Source): You can put this solution on YOUR website!y=6/5x the y int =(0,0)
 Travel_Word_Problems/411410: Airspeed of a Plane Two ground observers are 20 mi apart. They communicate with each other by cell phone and note that a passenger plane has passed over each of them exactly 5 minutes apart. If this plane is flying into a 50-mi/h headwind, what is the airspeed of this plane? What I tried: Distance=Rate x Time 50-20= r x 12 Since time must be in hour i converted 5 minutes by dividing by 60 1 solutions Answer 289220 by rfer(12654)   on 2011-02-19 20:32:55 (Show Source): You can put this solution on YOUR website!50-20=0.083x 30/0.083=x x=375 mph
 Graphs/411463: 8x-(6x+8)=6 solve1 solutions Answer 289219 by rfer(12654)   on 2011-02-19 20:26:25 (Show Source): You can put this solution on YOUR website!8x-6x=6+8 2x=14 x=7
 Volume/411416: How do I find the height of a cone with an approximate volume of 134 cm3 and a radius of 4 cm?1 solutions Answer 289218 by rfer(12654)   on 2011-02-19 20:25:13 (Show Source): You can put this solution on YOUR website!V=pir^2h/3 134=3.14*16*h/3 134*3=50.24h h=134/50.24 h=2.67 cm
 Equations/411415: 5/9X+1/3=61 solutions Answer 289217 by rfer(12654)   on 2011-02-19 20:21:04 (Show Source): You can put this solution on YOUR website!5/9x=6-1/3 5/9x=5 2/3 x=17/3*9/5 x=153/15 x=10 1/5
 Geometry_Word_Problems/411460: ``how many linear feet of fencing would be needed to enclose a rectangular garden that measures 30 feet long by 8feet wide. explain how you got your answer.''1 solutions Answer 289215 by rfer(12654)   on 2011-02-19 20:17:51 (Show Source): You can put this solution on YOUR website!P=2W+2L P=2*8+2*30 p=76 ft
 Linear-equations/411402: Solve for x -1 = -1/2x - 41 solutions Answer 289214 by rfer(12654)   on 2011-02-19 20:16:05 (Show Source): You can put this solution on YOUR website!3=-1/2x 3*-2/1=x x=-6
 Graphs/411452: Find the slope if it exists, of the line containing the pair of points. (-5.1,2.8) and (-4.9,2.6) the slope is?1 solutions Answer 289212 by rfer(12654)   on 2011-02-19 20:13:10 (Show Source): You can put this solution on YOUR website!slope m=(2.6-2.8)/(-4.9--5.1) m=-.2/.2 m=-1
 Functions/411454: Given the function K(s)=2s+9, find each of the following. K(4)= K (-7)= K (6.6)=1 solutions Answer 289211 by rfer(12654)   on 2011-02-19 20:10:03 (Show Source): You can put this solution on YOUR website!k(4)=2*4+9 k(4)=8+9 k(4)=17
 Graphs/411457: find and equation of the line containing the given pair of points (2,3) and (6,5) y=?1 solutions Answer 289209 by rfer(12654)   on 2011-02-19 20:08:36 (Show Source): You can put this solution on YOUR website!y=x+1
 Quadratic_Equations/411426: Solving this equation graphically 2.5x^2 = 4.75x - 2.11 solutions Answer 289207 by rfer(12654)   on 2011-02-19 20:06:05 (Show Source): You can put this solution on YOUR website!2.5x^2-4.75x+2.1=0 zero's are 0.638, 1.26 axis of symmetry = 0.941
 Polynomials-and-rational-expressions/411450: (3z^4 -8)^2 cannot figure out how to find the product of this equation 1 solutions Answer 289205 by rfer(12654)   on 2011-02-19 19:52:21 (Show Source): You can put this solution on YOUR website!9z^8-24z^4-24z^4+64 =9z^8-48z^4+64
 test/411434: Henry received a 6% raise. If his old monthly salary was \$2,250, what is his monthly salary now? 1 solutions Answer 289204 by rfer(12654)   on 2011-02-19 19:50:25 (Show Source): You can put this solution on YOUR website!2250*1.06=2385
 Radicals/411439: Simplify: 5 radical 243 1 solutions Answer 289203 by rfer(12654)   on 2011-02-19 19:47:04 (Show Source): You can put this solution on YOUR website!Is it 5 time the sqrt of 243 or the 5th root of 243?
 Money_Word_Problems/411438: monthly payments of \$275.00 for 58 months on a loan of \$15,950.00 is what percent interest? Thank you, Char1 solutions Answer 289199 by rfer(12654)   on 2011-02-19 19:43:40 (Show Source): You can put this solution on YOUR website!0% interest
 Surface-area/411448: Stacey has a rectangular garden that measures 30 feet long by 8 feet wide. A plastic sheet will be placed on top of the soil to prevent weeds from growing. Find the area of this plastic sheet.1 solutions Answer 289198 by rfer(12654)   on 2011-02-19 19:41:09 (Show Source): You can put this solution on YOUR website!A=30*8 A=240 sq ft
 Exponents-negative-and-fractional/411443: write the number in standard notation 9 * 10 ^41 solutions Answer 289197 by rfer(12654)   on 2011-02-19 19:40:08 (Show Source): You can put this solution on YOUR website!90,000
 Unit_Conversion_Word_Problems/411447: how many linear feet of fencing would be needed to enclose a rectangular garden that measures 30 feet long by 8feet wide1 solutions Answer 289195 by rfer(12654)   on 2011-02-19 19:38:56 (Show Source): You can put this solution on YOUR website!2*8+2*30=76 ft
 Quadratic_Equations/411341: Solve using the quadratic formula: 2x^2-11x-2=01 solutions Answer 289171 by rfer(12654)   on 2011-02-19 14:18:36 (Show Source): You can put this solution on YOUR website!a=2, b=-11, c=-2 -------- (-b+-sqrtb^2-4ac)/2a (11+-sqrt 121+16)/4 (11+-11.7)/4 -.7/4=-0.175 22.7/4=5.675 y int =-2 axis of symetry= 2.75
 Reduction-of-unit-multipliers/411260: increase each of the following by32.5% 11, 119, 22100, 4, 32.5 increase each of the following by 43% 100101001, 98, .00943,8, 173.684211 solutions Answer 289167 by rfer(12654)   on 2011-02-19 14:06:38 (Show Source): You can put this solution on YOUR website!11*1.325=14.575 119*1.325=157.675 -------------------- 98*1*43=140.14 .00943*1.43=0.0134849 You try the others.
 Equations/411273: How do I write an equation for spending at least \$5.00 but not more than \$10.001 solutions Answer 289166 by rfer(12654)   on 2011-02-19 14:00:02 (Show Source): You can put this solution on YOUR website!5 =< x =< 10
 Equations/411325: Can someone please help me with this problem: square root of 278.676 1 solutions Answer 289165 by rfer(12654)   on 2011-02-19 13:53:01 (Show Source): You can put this solution on YOUR website!=16.69
 Equations/411326: Need help please with this problem. -36 3/21 solutions Answer 289164 by rfer(12654)   on 2011-02-19 13:52:05 (Show Source): You can put this solution on YOUR website!-37 1/2
 Equations/411333: I'm confused here. Can someone please help me out with this problem. 4square root of 6251 solutions Answer 289162 by rfer(12654)   on 2011-02-19 13:50:18 (Show Source): You can put this solution on YOUR website!4rt 625=5
 Exponents/411212: I need help please with problems where I'm solving for the square root of x. One question is the square root of X = 5. 1 solutions Answer 289101 by rfer(12654)   on 2011-02-19 01:36:48 (Show Source): You can put this solution on YOUR website!sqrt 25=5
 Distributive-associative-commutative-properties/411168: Evalute g-16 for g=251 solutions Answer 289100 by rfer(12654)   on 2011-02-19 01:35:51 (Show Source): You can put this solution on YOUR website!25-16=9