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# Recent problems solved by 'rfer'

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 Graphs/226539: Find the slope and the y-intercept y=3.1x-6 The slope is ?1 solutions Answer 168668 by rfer(12657)   on 2009-10-14 14:40:39 (Show Source): You can put this solution on YOUR website!y=mx+b slope=m=3.1 y int=b=-6
 Probability-and-statistics/226527: Eight people were asked how many immediate family members they have. The results were: {5,2,4,4,3,6,7,7}. If one of the eight people was selected at random, what is the chance of selecting an even number or less than 4? Thank you for your help!!1 solutions Answer 168666 by rfer(12657)   on 2009-10-14 14:39:07 (Show Source): You can put this solution on YOUR website!even number= 4/8=1/2 under 4=2/8=1/4
 Graphs/226536: Find the slope and the y-intercept of the line. Write the fractional answer in lowest terms. y=-1/4x-8/5 The slope is ?1 solutions Answer 168665 by rfer(12657)   on 2009-10-14 14:37:07 (Show Source): You can put this solution on YOUR website!y=mx+b m= slope=-1/4 b= y int=-8/5=-1 3/5
 Quadratic_Equations/226528: how do i graph x+2y=-2 useing intercept method?1 solutions Answer 168662 by rfer(12657)   on 2009-10-14 14:35:03 (Show Source): You can put this solution on YOUR website!y int when x=0 (0,-1) x int when y=0 (-2.0) ------------ x+2y=-2 0+2y=-2 y=-1 ------------ x+2(0)=-2 x=-2
 Miscellaneous_Word_Problems/226237: A developer paid \$47,567.89 for 14 acres of land. How much was paid for 1 acre? Round to the nearest cent.1 solutions Answer 168554 by rfer(12657)   on 2009-10-13 22:47:12 (Show Source): You can put this solution on YOUR website!47567.89/14=\$3397.71 per acre
 Average/226260: A test is worth three times as much as a quiz. If a student has test grades of 85 and 92, and quiz grades of 82, 75, and 95, what is the student's average grade? Looking for the set-up formula and solution. Thank you.1 solutions Answer 168553 by rfer(12657)   on 2009-10-13 22:41:29 (Show Source): You can put this solution on YOUR website!your just looking for average (85+92+82+75+95)/5= 492/5=85.8
 Inequalities/226283: help my solve this problem:glenda has a \$40 gift certificate to a cafe that sells her favorite tuna sandwitch for \$3.75 after tax.what are the possible numbers of tuna sandwiches glenda can buy.1 solutions Answer 168551 by rfer(12657)   on 2009-10-13 22:33:53 (Show Source): You can put this solution on YOUR website!40/3.75>10
 Probability-and-statistics/226290: Nine households had the following number of children per household: 1, 7, 0, 4, 1, 8, 8, 5, 3 Find the mean, median, mode, range, and midrange for these data. 1 solutions Answer 168550 by rfer(12657)   on 2009-10-13 22:29:33 (Show Source): You can put this solution on YOUR website!range=8 mean=33/8=4.125 median=3+5=8/2=4 mode=1,8
 Equations/226205: Please help me solve this equation: 3(2x-1)-11= -2 (1-x) I thought I had done it right a number of times, but when I plugged in the number I said was equal to x, it was completely wrong! All I know for sure is the Distributive Property has to be done first.1 solutions Answer 168509 by rfer(12657)   on 2009-10-13 20:08:07 (Show Source): You can put this solution on YOUR website!3(2x-1)-11=-2(1-x) 6x-3-11=-2+2x 4x=12 x=3
 Geometry_Word_Problems/226058: The area of a square is equal to the perimeter of an equilateral triangle. If the triangle has legs of length 12, what is the length of one side of the square? 1 solutions Answer 168471 by rfer(12657)   on 2009-10-13 17:32:55 (Show Source): You can put this solution on YOUR website!3*12=36 sq rt 36=6
 Equations/226073: Lorrie bought 3 1/5 lb of basil and 4 1/2 of oregano. How many pounds of herbs did she buy in total?1 solutions Answer 168470 by rfer(12657)   on 2009-10-13 17:30:32 (Show Source): You can put this solution on YOUR website!3 1/5+4 1/2 3 2/10+4 5/10=8 7/10 lbs
 Equations/226083: Linda walked 5/6 mi to the park and then another 1/9 mi to the cafe. How far did she walk in total?1 solutions Answer 168468 by rfer(12657)   on 2009-10-13 17:27:08 (Show Source): You can put this solution on YOUR website!5/6+1/9 25/36+4/36=29/36 mi
 Numeric_Fractions/226084: what is 1 1/4-3/41 solutions Answer 168467 by rfer(12657)   on 2009-10-13 17:23:49 (Show Source): You can put this solution on YOUR website!1 1/4-3/4 5/4-3/4=2/4=1/2
 Equations/226087: Arrange the three fractions from least to greatest. 1/2, 5/6, 3/71 solutions Answer 168466 by rfer(12657)   on 2009-10-13 17:22:09 (Show Source): You can put this solution on YOUR website!3/7, 1/2, 5/6
 Equations/226088: 6x-4= 1 How do you solve this one?1 solutions Answer 168464 by rfer(12657)   on 2009-10-13 17:21:14 (Show Source): You can put this solution on YOUR website!6x-4=1 add 4 6x=5 divide by 6 x=5/6
 Equations/226077: A rectangle measures 4/7 inches by 3/5 inches. What is the perimeter of the book? (Use P= 2L + 2W) can you please assist me with this one?1 solutions Answer 168463 by rfer(12657)   on 2009-10-13 17:19:49 (Show Source): You can put this solution on YOUR website!P=2(4/7)+2(3/5) P=2(20/35)+2(21/35) P=40/35+42/35 P=82/35 P=2 12/35 in
 Equations/226068: 2/3x + 4/5= 9/10 I don't understand it at all...please help!1 solutions Answer 168460 by rfer(12657)   on 2009-10-13 17:07:33 (Show Source): You can put this solution on YOUR website!2/3x+4/5=9/10 find common denominator 20/30x+25/30=27/30 subtract 25/30 20/30x=2/30 divide by 20/30 to do that we invert and multiply x=(2/30)/(20/30) x=(2/30)(30/20) x=60/600 reduce fraction x=1/10
 Probability-and-statistics/226050: what is the probability of drawing an ace of diamonds rounded four decimal places1 solutions Answer 168458 by rfer(12657)   on 2009-10-13 17:01:34 (Show Source): You can put this solution on YOUR website!1/52=.0192=1.92%
 Human-and-algebraic-language/225958: Justify the step used in 4k-3=2k+5 1 solutions Answer 168403 by rfer(12657)   on 2009-10-13 13:50:36 (Show Source): You can put this solution on YOUR website!4k-3=2k+5 subtract 2k 2k-3=5 add 3 2k=8 divide by 2 k=4
 test/225966: Find the equation of the line that contains the points (0, –4) and (10, 3).1 solutions Answer 168401 by rfer(12657)   on 2009-10-13 13:48:36 (Show Source): You can put this solution on YOUR website!y=4/5x-4
 test/225964: Point (1, –2) , m = –5.1 solutions Answer 168400 by rfer(12657)   on 2009-10-13 13:46:42 (Show Source): You can put this solution on YOUR website!y=mx+b y=-5x+3
 Rectangles/225942: how do I calculate x if a rectangle has a perimeter of 66cm with a length of 10cm and a width of x-3cm laura1 solutions Answer 168399 by rfer(12657)   on 2009-10-13 13:44:45 (Show Source): You can put this solution on YOUR website!P=2L+2w 66=2(10)+2(x-3) 66=20+2x-6 52=2x x=26 width=x-3=23cm
 Numeric_Fractions/225926: what is 2/3 of \$392 dollars.1 solutions Answer 168391 by rfer(12657)   on 2009-10-13 13:08:56 (Show Source): You can put this solution on YOUR website!392*2/3=784/3=261 1/3
 expressions/225752: could you please tell me what the mathematical expression for "take x and increased it by the double of six".1 solutions Answer 168354 by rfer(12657)   on 2009-10-13 01:03:31 (Show Source): You can put this solution on YOUR website!x+12
 Linear-equations/225776: what would the graph look like if i were graphing y=4-2x 1 solutions Answer 168353 by rfer(12657)   on 2009-10-13 00:59:00 (Show Source): You can put this solution on YOUR website!slope of -2, y int +4 slope downward
 Equations/225782: a bus traveling at the rate of 30 miles per hour left the city at 11:45 a.m. A car following the bus at 45 miles per hour left the city at noon.At what time will the driver catch up with the bus? 1 solutions Answer 168352 by rfer(12657)   on 2009-10-13 00:56:59 (Show Source): You can put this solution on YOUR website!bus has 7.5 mi lead car overtaking at 15 mph 7.5/15=.5 hrs meeting time 11:45 am +30 min=12:15 pm
 Numeric_Fractions/225786: how i solve this please help ((6+4)(6+4))-(25x2)?1 solutions Answer 168349 by rfer(12657)   on 2009-10-13 00:51:50 (Show Source): You can put this solution on YOUR website!((6+4)(6+4))-(25x2) 10*10-50 100-50=50
 Angles/225750: Two angles are supplementary. One angle is 25 more than the other angle. Find the degree measure of the larger angle.1 solutions Answer 168332 by rfer(12657)   on 2009-10-12 21:34:51 (Show Source): You can put this solution on YOUR website!x+25+x=180 2x=155 x=77.5 degrees x+25=102.5 degrees
 expressions/225745: x-8=-81 solutions Answer 168331 by rfer(12657)   on 2009-10-12 21:32:34 (Show Source): You can put this solution on YOUR website!x-8=-8 add 8 x-8+8=-8+8 x=0
 expressions/225746: -72=8x-481 solutions Answer 168330 by rfer(12657)   on 2009-10-12 21:31:12 (Show Source): You can put this solution on YOUR website!-72=8x-48 -24=8x x=-3
 expressions/225749: 6v-28=501 solutions Answer 168328 by rfer(12657)   on 2009-10-12 21:29:39 (Show Source): You can put this solution on YOUR website!6v-28=50 6v=78 v=13