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Recent problems solved by 'rfer'

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Average/351334: 2-(-b)=-6 can you help me find the answer? 1 solutions Answer 251053 by rfer(12657)   on 2010-10-03 18:04:22 (Show Source): You can put this solution on YOUR website! 2+b=-6 b=-8

Numeric_Fractions/351338: what is 4-2/5*1/2*3-1/2 please show work 1 solutions Answer 251051 by rfer(12657)   on 2010-10-03 18:03:00 (Show Source): You can put this solution on YOUR website! 4-2/10-1/2 40/10-2/10-5/10=33/10=3 3/10

Distributive-associative-commutative-properties/351339: Can someone please help me. This is due tonight and it is the only one that I cannot get. The question Explain the distributive property and use it to rewrite the expression 7(5x+4y) 1 solutions Answer 251050 by rfer(12657)   on 2010-10-03 18:00:17 (Show Source): You can put this solution on YOUR website! just multiply through by 7 35x+28y

Sequences-and-series/351198: find a number whos product with 9 is the same as its sum with 56 1 solutions Answer 251033 by rfer(12657)   on 2010-10-03 16:09:09 (Show Source): You can put this solution on YOUR website! 9x=x+56 8x=56 x=7

Finance/351268: Marisa and lisa earned a total of $65 babysitting during the month of november. Marisa earned $5 more than 1/2 of whatlisa earned. How much didthey each earn? 1 solutions Answer 251032 by rfer(12657)   on 2010-10-03 16:07:12 (Show Source): You can put this solution on YOUR website! x+.5x+5=65 1.5x=60 x=$40 .5x+5=$25

Geometry_Word_Problems/351205: I have to figure out the largest shape that can be done with a perimeter of 200 meters? 1 solutions Answer 251031 by rfer(12657)   on 2010-10-03 16:04:29 (Show Source): You can put this solution on YOUR website! a square is always the largest 200/4=50 m each side

Triangles/351197: find the length to the nearest tenth of the unknown leg of a right triangle with a hypotenuse of 16 inches and one leg measuring 9 inches? 1 solutions Answer 251030 by rfer(12657)   on 2010-10-03 16:02:12 (Show Source): You can put this solution on YOUR website! 256-81=175 sq rt 175=13.2 in

Equations/351202: Lisa paid 71.35 on shoes, during a 40% off sale. What was the regular price? 1 solutions Answer 251029 by rfer(12657)   on 2010-10-03 16:00:19 (Show Source): You can put this solution on YOUR website! 71.35/0.60=$118.92

Quadratic_Equations/351208: factor r^2+14r+49 1 solutions Answer 251028 by rfer(12657)   on 2010-10-03 15:58:49 (Show Source): You can put this solution on YOUR website! (r+7)(r+7)

Travel_Word_Problems/351207: A train covers its 75 mile route in 1.2 hours What is it's speed? 1 solutions Answer 251027 by rfer(12657)   on 2010-10-03 15:57:43 (Show Source): You can put this solution on YOUR website! r=D/t r=75/1.2 r=62.5 mph

Linear-systems/351262: What is the answer to 11/2x - 4/5x = 47/10 1 solutions Answer 251024 by rfer(12657)   on 2010-10-03 15:53:20 (Show Source): You can put this solution on YOUR website! 11/2x-4/5x=47/10 find common denominator 55/10x-8/10x=47/10 47/10x=47/10 x=(47/10)/(47/10) x=47/10*10/47 x=470/470 x=1

Money_Word_Problems/351259: lola spends one third of her allowance on movies.she spends $8 at the movies. write and solve an equation to determine lola's weekly allowance. 1 solutions Answer 251023 by rfer(12657)   on 2010-10-03 15:49:54 (Show Source): You can put this solution on YOUR website! 8/(1/3)=x 8*3/1=24/1=$24

test/351210: A roof rises 4.5ft over a horizontal distance of 14.42ft. What is the slope of the roof to the nearest hundredth? 1 solutions Answer 251022 by rfer(12657)   on 2010-10-03 15:46:43 (Show Source): You can put this solution on YOUR website! 4.5/14.42=0.31

Equations/351222: v=1/3Bh for B E=1/2 mv(3)cubed for M 1 solutions Answer 251021 by rfer(12657)   on 2010-10-03 15:43:59 (Show Source): You can put this solution on YOUR website! v/(1/3h)=B E/(1/2v^3)=M

decimal-numbers/351211: Please help me solve this problem? Which of the following is the equivalent of 0.5%? a) 1/20 b) 1/200 c) 1/2000 d) 1/5 e) 1/500 1 solutions Answer 251020 by rfer(12657)   on 2010-10-03 15:41:36 (Show Source): You can put this solution on YOUR website! remove the % sign 0.005 remove the decimal, make it a fraction 5/1000 reduce if possible 1/200 (B)

Equations/351234: The area of the shara desert is 7 times the area of the Gabe desert. If the sum of their areas is 4,000,000, squre miles find the area of each desert. 1 solutions Answer 251019 by rfer(12657)   on 2010-10-03 15:36:33 (Show Source): You can put this solution on YOUR website! x+7x=4000000 8x=4000000 x=500,000 7x=3,500,000

Angles/351229: the measure of two supplementary angles are in the ration of 1:4 . Find the number of degres in the smaller angle. 1 solutions Answer 251018 by rfer(12657)   on 2010-10-03 15:34:46 (Show Source): You can put this solution on YOUR website! x+4x=180 5x=180 x=36 degrees 4x=144 degrees

Equations/351252: A student is building a bookcase with stepped shelves for her dorm room. She buys a 48 inch board and wants to cut the board into 3 consecuive even integers. find the 3 board lengths. 1 solutions Answer 251017 by rfer(12657)   on 2010-10-03 15:33:23 (Show Source): You can put this solution on YOUR website! x+x+2+x+4=48 3x=42 x=14 x+2=16 x+4=18

Equations/351237: What is x 55x -3(9x +12) = -64 1 solutions Answer 251016 by rfer(12657)   on 2010-10-03 15:31:27 (Show Source): You can put this solution on YOUR website! 55x-27x-36=-64 28x=28 28x/28=28/28 x=1

Inverses/351236: need help with fraction x/5 = 19.5 ?? 1 solutions Answer 251015 by rfer(12657)   on 2010-10-03 15:28:47 (Show Source): You can put this solution on YOUR website! x/5=19.5 multiply by 5 5*x/5=19.5*5 x=97.5

Travel_Word_Problems/351251: a motorcyclist travels 150 miles in 2 1/2 hours on the freeway. How far can the motorcyclist travel in 30 minutes on rural roads if the rate of travel is half that on the freeway? 1 solutions Answer 251014 by rfer(12657)   on 2010-10-03 15:26:52 (Show Source): You can put this solution on YOUR website! 150/2.5=60 mph freeway (60/2)*.5=15 miles

Equations/351242: a 46 foot piece of rope is cut into three pieces so that the second piece is 3 times as long as the first piece, and the 3rd piece is 2 foot more than seven times the length of the first piece. Find the length of the three pieces. 1 solutions Answer 251013 by rfer(12657)   on 2010-10-03 15:24:51 (Show Source): You can put this solution on YOUR website! x+3x+7x+2=46 11x=44 x=4 3x=12 7x+2=30

Travel_Word_Problems/351246: mrs. williams is driving on the interstate at rate of 58 mi/hr. write an expression for the distance she will drive in x hr at this rate. 1 solutions Answer 251012 by rfer(12657)   on 2010-10-03 15:22:35 (Show Source): You can put this solution on YOUR website! D=58x

Equations/351248: In a recent election in NY for a seat in the U.S. house of representatives, Timothy Bishop recieved 35,650 more votes than opponent Italo Zanzi. If the total number of votes was 158,192, find the number of votes for each candidate 1 solutions Answer 251011 by rfer(12657)   on 2010-10-03 15:21:29 (Show Source): You can put this solution on YOUR website! x+x+35650=158192 2x=122542 x=61271 x+35650=96921

test/350921: in a sale the price of a shirt was reduced 20% to $600. caculate the price before the sale. 1 solutions Answer 250880 by rfer(12657)   on 2010-10-02 20:17:01 (Show Source): You can put this solution on YOUR website! 600/.8=750

Linear-equations/351010: I need to find the y-intecept for is equation -2x+2y=12. 1 solutions Answer 250878 by rfer(12657)   on 2010-10-02 20:14:24 (Show Source): You can put this solution on YOUR website! 2y=2x+12 y=x+6 y int=6 (0,6)

absolute-value/350990: -(-x) 1 solutions Answer 250876 by rfer(12657)   on 2010-10-02 20:13:08 (Show Source): You can put this solution on YOUR website! +x

Equations/350643: how do I translate 'the quotient of x+3 and 5y is the same as the product of x and y' into algebraic expression? 1 solutions Answer 250616 by rfer(12657)   on 2010-10-01 13:01:37 (Show Source): You can put this solution on YOUR website! (x+3)/5y=xy

Length-and-distance/350630: Twice the area of a square is 72 square miles. What is the length of each side of the square 1 solutions Answer 250615 by rfer(12657)   on 2010-10-01 13:00:21 (Show Source): You can put this solution on YOUR website! 72/2=36 sq rt 36=6

Exponents-negative-and-fractional/350406: five eighths divided by 2 and one half 1 solutions Answer 250496 by rfer(12657)   on 2010-09-30 20:40:06 (Show Source): You can put this solution on YOUR website! 5/8 / 5/2 5/8*2/5=10/40=1/4

Length-and-distance/350401: How many feet is 145 inches diagonal? Thanks!!! 1 solutions Answer 250495 by rfer(12657)   on 2010-09-30 20:38:28 (Show Source): You can put this solution on YOUR website! 145/12=12.08 ft