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# Recent problems solved by 'rfer'

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 Travel_Word_Problems/392660: How long would it take a train traveling 45 miles per hour to get 15 miles?1 solutions Answer 278703 by rfer(12660)   on 2011-01-10 10:43:00 (Show Source): You can put this solution on YOUR website!t=D/r t=15/45 D=0.33 hr=20 min
 Triangles/392475: A garden has the shape of an isosceles right triangle. the length of the hypotenuse is 24 feet. what is the area of the garden? I need help!!1 solutions Answer 278564 by rfer(12660)   on 2011-01-09 21:01:28 (Show Source): You can put this solution on YOUR website!24^2=a^2+b^2 576=a^2+b^2 576=288+288 sqrt 288=16.97 a=1/2LW a=.5*16.97*16.97 a=144 sqft
 Coordinate-system/392488: graph the equation x+2y=61 solutions Answer 278562 by rfer(12660)   on 2011-01-09 20:54:57 (Show Source): You can put this solution on YOUR website!y=-1/2x+3 b=3 (0,3) slope m=-1/2 second point (2,2)
 Expressions-with-variables/392396: multiply (s+(1)/(5))(s+(1)/(2))I have s^2+7/10s+1/101 solutions Answer 278560 by rfer(12660)   on 2011-01-09 20:46:59 (Show Source): You can put this solution on YOUR website!Looks good that is what I got
 test/392399: 11/14 - 1/2 = a - 1/71 solutions Answer 278557 by rfer(12660)   on 2011-01-09 20:43:54 (Show Source): You can put this solution on YOUR website!11/14-7/14=a-2/14 4/14=a-2/14 6/14=a 3/7=a
 Graphs/392411: I'm confused about graphing y=1/3x-11 solutions Answer 278555 by rfer(12660)   on 2011-01-09 20:39:17 (Show Source): You can put this solution on YOUR website!y intercept = -1 (0,-1) slope m=1/3 plot y int first then use m three right and one up for second point 2nd poit at (3,0)
 Polynomials-and-rational-expressions/392423: How to simpilify this expression(3/10x^3-3/10x-1/2)-(-1/10x^3+3/10x-1/2)through subtraction?1 solutions Answer 278549 by rfer(12660)   on 2011-01-09 20:33:57 (Show Source): You can put this solution on YOUR website!3/10x^3-3/10x-1/2 1/10x^3-3/10x+1/2 ----------------- 4/10x^3-6/10x reduce ---------------- 2/5x^3-3/5x
 Linear-systems/392474: find the slope-intercept equationof the line that had the given characteristics slope 4 and y- interceot (0,3)1 solutions Answer 278546 by rfer(12660)   on 2011-01-09 20:27:32 (Show Source): You can put this solution on YOUR website!y=4x+3
 Travel_Word_Problems/392469: ONe Sunday afternoon the Martin family went for a drive for 2 2/3 hours. If they averaged 42 miles per hour, how many miles did they travel?1 solutions Answer 278544 by rfer(12660)   on 2011-01-09 20:26:33 (Show Source): You can put this solution on YOUR website!2 2/3*42= 8/3*42=112 miles
 Percentage-and-ratio-word-problems/392471: Joey bought a secondhand bike. He paid 2/3 of the original price for it. How much did he pay if it orginally cost \$300.00?1 solutions Answer 278543 by rfer(12660)   on 2011-01-09 20:24:14 (Show Source): You can put this solution on YOUR website!300*2/3=600/3=200
 Divisibility_and_Prime_Numbers/392433: what is the time of the loan if: Balance =\$5000 Principal= \$4000 Interest rate = 5%1 solutions Answer 278541 by rfer(12660)   on 2011-01-09 20:23:06 (Show Source): You can put this solution on YOUR website!I=prt I/pr=t 1000/4000*.05= 1000/200=5 yrs
 Distributive-associative-commutative-properties/392463: i am trying to figure out how to solve equations using fractions like...5/7m - 2 -6/7m= -131 solutions Answer 278540 by rfer(12660)   on 2011-01-09 20:19:37 (Show Source): You can put this solution on YOUR website!5/7m-2-6/7m=-13 -1/7m=-11 m=-11/(-1/7) m=-11*-7/1 m=77
 Linear-equations/392440: The points (-2,11) and (6,3) lie on the same line. What is the x-intercept of the line?1 solutions Answer 278537 by rfer(12660)   on 2011-01-09 20:16:12 (Show Source): You can put this solution on YOUR website!m=3-11/6--2 m=-7/8 ---------------- y=mx+b 3=-7/8*6+b 3=-42/6+b 3=-7+b b=10 ----------------- y=-7/8x+10 0-10=-7/8x x=11.43 (11.43,0)
 Miscellaneous_Word_Problems/392459: a rectangular sheet of plywood is seven times longer than it is wide. Write and simplify an expression for the perimeter of the rectangular in terms of the width w.1 solutions Answer 278533 by rfer(12660)   on 2011-01-09 20:07:02 (Show Source): You can put this solution on YOUR website!p=2w+2(7w) p=16w
 Equations/392457: y+3=1 / 2(x-5) put in standard form1 solutions Answer 278531 by rfer(12660)   on 2011-01-09 20:04:37 (Show Source): You can put this solution on YOUR website!y+3=.5x-2.5 -.5x+y=-5.5 0.5x-y=5.5
 Travel_Word_Problems/392441: john has to attend a meeting 110 miles away from home. the meeting starts at 10 a.m. if john drives at an average speed of 50 miles per hour at what time should he laeve home to be at the meeting just in time1 solutions Answer 278529 by rfer(12660)   on 2011-01-09 20:02:56 (Show Source): You can put this solution on YOUR website!110/50=2.2 hrs=2 hr 12 min 7:48 am
 Polynomials-and-rational-expressions/392455: How to factor this expression t^2-4t-45 completely?1 solutions Answer 278525 by rfer(12660)   on 2011-01-09 19:58:30 (Show Source): You can put this solution on YOUR website!(t-9)(t+5)
 Equations/392391: x-5=-11 solutions Answer 278495 by rfer(12660)   on 2011-01-09 18:19:07 (Show Source): You can put this solution on YOUR website!x=+4
 Graphs/392359: (0,4),y=-4x+5 1 solutions Answer 278494 by rfer(12660)   on 2011-01-09 18:18:37 (Show Source): You can put this solution on YOUR website!y=-4x+4
 Polynomials-and-rational-expressions/392377: Mulitply: (2x + 1 )(3x^2 + 2x) Mulitply and simplify: (x - 4)^21 solutions Answer 278493 by rfer(12660)   on 2011-01-09 18:17:09 (Show Source): You can put this solution on YOUR website!A) 6^3+7x^2-2x B) x^2-8x+16 remember FOIL
 Average/392381: I'm having trouble, multiply (-7.8)(8)(-4)1 solutions Answer 278492 by rfer(12660)   on 2011-01-09 18:13:38 (Show Source): You can put this solution on YOUR website!+249.6 you have 2 minus signs so answer is positive
 Polynomials-and-rational-expressions/392360: Divide and simplify this polynomial, 7^9/7^7?1 solutions Answer 278491 by rfer(12660)   on 2011-01-09 18:12:07 (Show Source): You can put this solution on YOUR website!7^2
 Average/392379: How do I find the reciprocal of 1/2(10-5) 1 solutions Answer 278490 by rfer(12660)   on 2011-01-09 18:10:47 (Show Source): You can put this solution on YOUR website!=2.5 reciprocal =1/2.5
 Average/392378: how do I perform the indicated operation of -2-(-25) -------- -4-(-4)1 solutions Answer 278489 by rfer(12660)   on 2011-01-09 18:08:57 (Show Source): You can put this solution on YOUR website!-2-(-25)=+23 -4-(-4)=0
 Average/392385: how do I add -61 + (-34)1 solutions Answer 278488 by rfer(12660)   on 2011-01-09 18:07:29 (Show Source): You can put this solution on YOUR website!-61-34=-95 just move down the number line
 Linear-equations/392361: 8. Which of the following is the equation in slope-intercept form of the line through the points (1, 4) and (–1, –7)? (2 points)1 solutions Answer 278487 by rfer(12660)   on 2011-01-09 18:06:02 (Show Source): You can put this solution on YOUR website!m=-7-4/-1-1 m=-11/-2 m=5.5 ------------------- y=mx+b -7=5.5*-1+b -7=-5.5+b b=-1.5 ---------------- y=5.5x-1.5
 Polynomials-and-rational-expressions/392374: How to simplify this expression, (2^7)^8?1 solutions Answer 278485 by rfer(12660)   on 2011-01-09 17:53:00 (Show Source): You can put this solution on YOUR website!2^56
 Travel_Word_Problems/392369: Two cyclists start biking from a trail's start 3 hours apart. The second cyclist travels at 10 miles per hour and starts 3 hours after the first cyclist who is traveling a 6 miles per hour. How much time will pass before the second cyclist catches up with the first from the time the second cyclist started biking?1 solutions Answer 278484 by rfer(12660)   on 2011-01-09 17:52:20 (Show Source): You can put this solution on YOUR website!18 mi lead overtake at 4 mph 18/4=4.5 hrs
 Angles/392370: simplify - 77xz/ 253xz 1 solutions Answer 278483 by rfer(12660)   on 2011-01-09 17:50:26 (Show Source): You can put this solution on YOUR website!-7/23
 Expressions-with-variables/392364: Evaluate each expression for n=6 and n=15. N+15____ _____ 5*n____ _____ n/3 _____ _____ n-5____ _____ Do I just 6+15= and then 15+15= and write the answer in the blank space?1 solutions Answer 278482 by rfer(12660)   on 2011-01-09 17:49:13 (Show Source): You can put this solution on YOUR website!yes a)=21 30 b)=30 75 c)=2 5 d)=1 10
 Numbers_Word_Problems/392362: Seven less than 4 times the square of a number is 18. Find the number.1 solutions Answer 278480 by rfer(12660)   on 2011-01-09 17:42:03 (Show Source): You can put this solution on YOUR website!4x^2-7=18 4x^2=25 x^2=6.25 x=2.5