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# Recent problems solved by 'rfer'

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 Linear-equations/383475: write the equation of the line passing through A (-1,6) and (3,-4)? 1 solutions Answer 271504 by rfer(12644)   on 2010-12-09 01:12:13 (Show Source): You can put this solution on YOUR website!m=-4-6/3--1=-10/4 m=-2.5 -------------- y=mx+b -4=-2.5*3+b -4=-7.5+b b=3.5 --------- y=-2.5x+3.5
 Linear-equations/383429: Find the slope and Y intercept of (-4,3) (0,0) (1,-1) (3,-3)1 solutions Answer 271502 by rfer(12644)   on 2010-12-09 01:07:25 (Show Source): You can put this solution on YOUR website!slope m=-1 y int b=0
 Expressions-with-variables/383469: Find three consecutive numbers whose sum is 90.1 solutions Answer 271500 by rfer(12644)   on 2010-12-09 01:04:34 (Show Source): You can put this solution on YOUR website!x+x+1+x+2=90 3x=87 x=29 x+1=30 x+2=31
 Equations/383374: Jamal received a 20% discount when he purchased his computer. He paid \$920.00 What was the regular price of the computer?1 solutions Answer 271474 by rfer(12644)   on 2010-12-08 22:49:20 (Show Source): You can put this solution on YOUR website!920/0.80=1150
 Equations/383400: What is the answer to this equation 10g+5=11g 1 solutions Answer 271473 by rfer(12644)   on 2010-12-08 22:46:21 (Show Source): You can put this solution on YOUR website!subtract 10g g=5
 Equations/383407: 4x-1(2)=5x+41 solutions Answer 271472 by rfer(12644)   on 2010-12-08 22:44:45 (Show Source): You can put this solution on YOUR website!x=-6
 Miscellaneous_Word_Problems/383086: A shop sells compact disks for \$15 per piece. If each disk costs \$6 to the shop owner how much profit percent does the shop owner earn? 1 solutions Answer 271374 by rfer(12644)   on 2010-12-08 16:21:44 (Show Source): You can put this solution on YOUR website!9/6=1.50=150%
 Linear-equations/383146: 5x+3y=9 in function form1 solutions Answer 271373 by rfer(12644)   on 2010-12-08 16:15:45 (Show Source): You can put this solution on YOUR website!3y=-5x+9 y=-5/3x+3 f(x)=-5/3x+3
 Travel_Word_Problems/383135: A car travels at an average speed of 68miles per hour. How many miles does it travel in 5hours and 15minutes? 1 solutions Answer 271371 by rfer(12644)   on 2010-12-08 16:14:08 (Show Source): You can put this solution on YOUR website!68*5.25=357 miles
 Volume/382990: what is the total area of a cylinder with a radius of 6 ft. and a height of 10 ft. ?1 solutions Answer 271333 by rfer(12644)   on 2010-12-08 13:41:38 (Show Source): You can put this solution on YOUR website!A=3.14*6^2*10
 Equations/383028: Write the equation of the line with slope -4 and y- intercept (0,9) I cam e up with y=4x+9 just want to know if i did this right1 solutions Answer 271331 by rfer(12644)   on 2010-12-08 13:37:23 (Show Source): You can put this solution on YOUR website!slope m=-4 y=-4x+9 this slope goes down to the right
 expressions/383038: Evaluate: 100 / b when b = 41 solutions Answer 271330 by rfer(12644)   on 2010-12-08 13:34:50 (Show Source): You can put this solution on YOUR website!100/4=25
 test/382781: 1/3x-2/5=1/4(x+3) solve for x1 solutions Answer 271217 by rfer(12644)   on 2010-12-08 01:17:51 (Show Source): You can put this solution on YOUR website!1/3x-2/5=1/4x+3/4 4/12x-3/12x=15/20+8/20 1/12x=23/20 x=(23/20)/(1/12) x=23/20*12/1 x=276/20 x=13 4/5
 Functions/382802: Given the function k described by k(x) =x +10, find each of the following. K(0)= ___ ? 1 solutions Answer 271212 by rfer(12644)   on 2010-12-08 01:09:45 (Show Source): You can put this solution on YOUR website!k(0)=0+10 k(0)=10
 Linear-equations/382805: Write an equation of the line containing the given point and parallel of the given line. Express your answer in the form y=mx+b (5,9); 4x+y=31 solutions Answer 271211 by rfer(12644)   on 2010-12-08 01:08:30 (Show Source): You can put this solution on YOUR website!4*5+9=b 29=b y=-4x+29
 Polynomials-and-rational-expressions/382819: me and shaira go to mall we pay for the buss for 35.00 pesos when we arrive we go to the bookstore and we buy a record book for only 35.00 pesos then we buy a chocolate for 45.00 pesos then we buy a action figure toy for 90.00 pesos then we buy a book for only 100.00 pesos then we buy a clothes for only 1,200.00 the money we have is 10,000.00 pesos how much we will pay for all the billings and the change???? 1 solutions Answer 271209 by rfer(12644)   on 2010-12-08 01:03:31 (Show Source): You can put this solution on YOUR website!purchases = 1505 change= 10000-1505=8495.00
 test/382817: If I earned 1600 and I spend 224 and I invest 1000 I put the remaining in a savings what percent of my earnings did I put in a savings?1 solutions Answer 271205 by rfer(12644)   on 2010-12-08 00:56:04 (Show Source): You can put this solution on YOUR website!1600-224-1000=376 376/1600=0.235=23.5%
 Equations/382820: a+1 3/4 = 6 1/41 solutions Answer 271203 by rfer(12644)   on 2010-12-08 00:53:11 (Show Source): You can put this solution on YOUR website!a+7/4=25/4 a=25/4-7/4 a=18/4 a=4 1/2
 Geometry_Word_Problems/382822: Two angles are complementary. The measure of one is 9 more than twice the other. find the measure of each angle. 1 solutions Answer 271202 by rfer(12644)   on 2010-12-08 00:50:57 (Show Source): You can put this solution on YOUR website!x+2x+9=90 3x=81 x=27 2x+9=63
 Numbers_Word_Problems/382831: Use the clues to find each number. The product of its digits is 24. It is odd. The difference between its digits is 5.1 solutions Answer 271201 by rfer(12644)   on 2010-12-08 00:48:42 (Show Source): You can put this solution on YOUR website!-3*-8=24
 Miscellaneous_Word_Problems/382827: The perimeter of a square is 32 feet. What is the area of the square?1 solutions Answer 271198 by rfer(12644)   on 2010-12-08 00:46:53 (Show Source): You can put this solution on YOUR website!32/4=8 8^2=64 sq ft
 Probability-and-statistics/382708: John has made 80% of his free throws throughout his career.He has made 1500 successful free throws.How many attempts has he made?1 solutions Answer 271150 by rfer(12644)   on 2010-12-07 20:56:24 (Show Source): You can put this solution on YOUR website!1500/.8=1875
 Graphs/382613: Write an equation in slope-intercept form for the line that contains each pair of points below (6,22) and (2,14)1 solutions Answer 271148 by rfer(12644)   on 2010-12-07 20:53:37 (Show Source): You can put this solution on YOUR website!m=14-22/2-6 m=-8/-4 m=2 ----------------------- y=mx+b solve for b 14=2*2+b b=10 ------------------ y=2x+10
 Graphs/382598: Write an equation in slope-intercept for the line that fits this description: contains the origin and has a slope of 2/31 solutions Answer 271146 by rfer(12644)   on 2010-12-07 20:49:27 (Show Source): You can put this solution on YOUR website!y=2/3x
 Matrices-and-determiminant/382700: determine values of the variables, if possible 4[-a]+[-a]=[5] 2b -2b -2 c 51 solutions Answer 271145 by rfer(12644)   on 2010-12-07 20:47:23 (Show Source): You can put this solution on YOUR website!-4a-a=5 -5a=5 a=-1 ------------------ -2 the b goes away -------------
 Graphs/382610: Write an equation in slope-intercept form for the line that contains each pair of points below (-9,-1) and (3,7)1 solutions Answer 271143 by rfer(12644)   on 2010-12-07 20:45:13 (Show Source): You can put this solution on YOUR website!m=7--1/3--9 m=8/12 m=2/3 --------------------- y=mx+b 7=2/3*3+b 7=6/3+b 5=b ---------------- y=2/3x+5
 Triangles/382681: I was woundering if i can get help on solving for x with a triangle. 1 solutions Answer 271140 by rfer(12644)   on 2010-12-07 20:33:57 (Show Source): You can put this solution on YOUR website!post the question
 Polygons/382616: Okay, I have to find the area of a regular polygon. This question is: Find the area of a pentago with a side of 10 ft. I keep getting 216.5, but the answer is 172. How did I mess up?1 solutions Answer 271136 by rfer(12644)   on 2010-12-07 20:25:13 (Show Source): You can put this solution on YOUR website!Use the equation. A=1.72048*s^2 A=1.72048*10^2 A=1.72048*100 A=172.048 round off to A=172 This works for a regular pentagon
 Exponents/382627: -3x+10x+4-7X1 solutions Answer 271126 by rfer(12644)   on 2010-12-07 20:07:39 (Show Source): You can put this solution on YOUR website!If your 7X should be 7x then the answer is 4
 Graphs/382611: Write an equation in slope-intercept form for the line that contains each pair of points below (6,-9) and (3,-5)1 solutions Answer 271123 by rfer(12644)   on 2010-12-07 20:05:30 (Show Source): You can put this solution on YOUR website!m=-5--9/3-6 m=4/-3 m=-4/3 --------------- -5=-4/3(3)+b -5=-4+b b=-1 ------------------- y=-4/3x-1