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# Recent problems solved by 'rfer'

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 Numeric_Fractions/429277: find the area of a circle whose radius is 8cm. USE II=22/7 rather than using 3.14.1 solutions Answer 298208 by rfer(12676)   on 2011-03-30 18:03:54 (Show Source): You can put this solution on YOUR website!A=22/7*8^2 A=1408/7 A=201.14 sq ft
 Surface-area/429276: I'm studying for my ACT, and I have no idea how to even begin to do this problem: A square is circumscribed about a circle with a 7-foot radius. What is the area of the square, in square feet?1 solutions Answer 298207 by rfer(12676)   on 2011-03-30 18:01:19 (Show Source): You can put this solution on YOUR website!The diameter and therfore the sides are 14 ft A=LW A=14^2 A=196 sq ft including the area of the circle. Area of the circle is A=pir^2 A=3.14*7^2 A=153.86 sq ft
 Proportions/429265: If you can read 18 pages in 27 minutes, how long will it take you to read 24 pages1 solutions Answer 298205 by rfer(12676)   on 2011-03-30 17:57:17 (Show Source): You can put this solution on YOUR website!18/27=24/x 18x=648 x=36 min
 Probability-and-statistics/429270: what will the be probability of a blue card is drawn at random from a bag containing 2 whites cards, 1 red card, and 7 blue cards1 solutions Answer 298204 by rfer(12676)   on 2011-03-30 17:55:04 (Show Source): You can put this solution on YOUR website!7/10, 70%
 test/429273: 8 times a number,x,decreased by y1 solutions Answer 298203 by rfer(12676)   on 2011-03-30 17:54:04 (Show Source): You can put this solution on YOUR website!8x-y=
 Exponential-and-logarithmic-functions/428913: simplify each number (-8)2/3 1 solutions Answer 297999 by rfer(12676)   on 2011-03-29 20:33:42 (Show Source): You can put this solution on YOUR website!-5 1/3
 Numeric_Fractions/428839: 3 3/4 divided by 1/101 solutions Answer 297992 by rfer(12676)   on 2011-03-29 20:04:06 (Show Source): You can put this solution on YOUR website!15/4*10/1=150/4=37 1/2
 Radicals/428854: simplify √81/1001 solutions Answer 297991 by rfer(12676)   on 2011-03-29 20:01:47 (Show Source): You can put this solution on YOUR website!0.9
 Angles/428849: please help me solve this question: Two angles are complementary. The measure of one angle is 2° more than seven times the measure of the other. Find the measure of each angle.1 solutions Answer 297990 by rfer(12676)   on 2011-03-29 20:00:51 (Show Source): You can put this solution on YOUR website!x+7x+2=90 8x=88 x=11 7x+2=79
 Rectangles/428856: What is the perimeter of a rectangle that is 15cm wide and 44cm long?1 solutions Answer 297988 by rfer(12676)   on 2011-03-29 19:56:09 (Show Source): You can put this solution on YOUR website!P=2*15+2*44
 Surface-area/428895: How do you find the surface area on a 5th grade level?1 solutions Answer 297987 by rfer(12676)   on 2011-03-29 19:53:13 (Show Source): You can put this solution on YOUR website!Area=length times width A=LW
 Evaluation_Word_Problems/428460: Connie Spent \$3 less than twice what Brenda spent. Connie spent \$81. How much did Brenda spend?1 solutions Answer 297822 by rfer(12676)   on 2011-03-29 00:36:24 (Show Source): You can put this solution on YOUR website!2x-3=81 2x=84 x=\$42
 Probability-and-statistics/428477: A card is drawn from a standard deck of cards. What is the probability the card will be a king or less than a six?1 solutions Answer 297821 by rfer(12676)   on 2011-03-29 00:31:13 (Show Source): You can put this solution on YOUR website!24/52=6/13=46%
 Parallelograms/428512: A parallelogram had two sides of 34 and 27 what are the other sides?1 solutions Answer 297820 by rfer(12676)   on 2011-03-29 00:25:31 (Show Source): You can put this solution on YOUR website!34 and 27
 Equations/428449: -31=8-6p-7p1 solutions Answer 297804 by rfer(12676)   on 2011-03-28 21:45:43 (Show Source): You can put this solution on YOUR website!-39=-13p p=3
 Equations/428443: simplyfy 6-{3-2[5-(-10)]+7]1 solutions Answer 297798 by rfer(12676)   on 2011-03-28 21:33:26 (Show Source): You can put this solution on YOUR website!+40
 test/428382: What is 5 over 12 plus 1 2 over 71 solutions Answer 297797 by rfer(12676)   on 2011-03-28 21:30:49 (Show Source): You can put this solution on YOUR website!5/12+12/7 35/84+144/84=179/84= 2 11/84
 test/428439: X+32=5x-12 what is x1 solutions Answer 297795 by rfer(12676)   on 2011-03-28 21:27:36 (Show Source): You can put this solution on YOUR website!44=4x x=11
 Average/428385: 2(x-3y)=1 solutions Answer 297794 by rfer(12676)   on 2011-03-28 21:26:32 (Show Source): You can put this solution on YOUR website!2x-6y
 Quadratic_Equations/428388: Solve for x 64(x^2) = 251 solutions Answer 297793 by rfer(12676)   on 2011-03-28 21:24:53 (Show Source): You can put this solution on YOUR website!x^2=25/64 x^2=0.39 x=0.6245
 Linear-equations/428416: what is the midpoint of the line segment whose endpoints are (5,-2) and (-3,7)1 solutions Answer 297791 by rfer(12676)   on 2011-03-28 21:18:35 (Show Source): You can put this solution on YOUR website!(1,2.5)
 Linear_Algebra/428417: c+2-2-5=5-21 solutions Answer 297790 by rfer(12676)   on 2011-03-28 21:15:23 (Show Source): You can put this solution on YOUR website!c=8
 Numeric_Fractions/428430: does 1 3/5=8/5? explain.1 solutions Answer 297788 by rfer(12676)   on 2011-03-28 21:10:47 (Show Source): You can put this solution on YOUR website!yes, the improper fraction is the same as the mixed number 1 3/5. 8 divided by 5= 1 3/5
 Linear-equations/428100: y = -2x-5 P(-8, 4) this is what i got b ut i dont think its right y-4= 2(x+8)1 solutions Answer 297687 by rfer(12676)   on 2011-03-28 15:13:01 (Show Source): You can put this solution on YOUR website!y=-2*-8-5 y=16-5 y=11 ---------- 4=-2x-5 2x=-9 x=4.5 I am not sure I understand your question, but this ordered pair does not fit this equation.
 Radicals/428174: How do I simplify 365 over 180 1 solutions Answer 297684 by rfer(12676)   on 2011-03-28 15:06:35 (Show Source): You can put this solution on YOUR website!365/180=2 1/36
 Geometry_Word_Problems/428182: perimeter of a retangles is 60. the length is 4 tims thw width. what is the length and width1 solutions Answer 297683 by rfer(12676)   on 2011-03-28 15:04:49 (Show Source): You can put this solution on YOUR website!2x+2(4x)=60
 Quadratic_Equations/428188: What is the y value of y = x^2 - 4x when the value of x is -1 negative 1 or the value of is ix 1 positive 1 are they the same? why or why not? can you show how you solved it? Thanks so much.1 solutions Answer 297682 by rfer(12676)   on 2011-03-28 15:03:38 (Show Source): You can put this solution on YOUR website!y=x^2-4x y=-1^2-4*-1 y=1+4 y=5 ----------- y=1^2-4*1 y=1-4 y=-3
 Money_Word_Problems/427966: Suppose that 5,700 is invested at 5% annual intrest rate, compounded monthly how much money will be in the account in 4 months? and in 3 years [round to the nearest cent] how many years will it take 7,000 to grow to 11,500 if it is invested at 9% compounded quarterly? and compounded daily?1 solutions Answer 297567 by rfer(12676)   on 2011-03-28 01:02:21 (Show Source): You can put this solution on YOUR website!A=5700(1+0.05/12)^4 A=5700(1+0.05/12)^12*3 11500=7000(1+0.09/4)^4n 11500=7000(1+0.09/365)^365n
 Miscellaneous_Word_Problems/428013: Two trains going in opposite directiosn leave at the same time.Train B travels 5 mph faster than train A. In 5 hours the trains are 425 miles apart.Find the speed of each. Thanks.1 solutions Answer 297566 by rfer(12676)   on 2011-03-28 00:55:29 (Show Source): You can put this solution on YOUR website!425/5=85 mph total x+x+5=85 2x=80 x=40 mph x+5=45 mph
 Human-and-algebraic-language/428002: x / (1,000,000 + x) =.301 solutions Answer 297564 by rfer(12676)   on 2011-03-28 00:53:16 (Show Source): You can put this solution on YOUR website!x=.3(1000000+x) x=300000+.3x .7x=300000 x=428,571
 Expressions-with-variables/427992: 5 (x -3) = 3(x +2)1 solutions Answer 297562 by rfer(12676)   on 2011-03-28 00:50:42 (Show Source): You can put this solution on YOUR website!5x-15=3x+6 2x=21 x=10.5