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# Recent problems solved by 'rfer'

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 Travel_Word_Problems/392078: If Marna drives 60 miles per hour, how many miles will Marna drive in x hours?1 solutions Answer 278250 by rfer(12644)   on 2011-01-08 20:21:25 (Show Source): You can put this solution on YOUR website!60x=D
 Graphs/392079: How do you graph a line when you have y=-3/4(x)+101 solutions Answer 278249 by rfer(12644)   on 2011-01-08 20:20:11 (Show Source): You can put this solution on YOUR website!start from the y intercept (0,10) then use the slope 4 right 3 down from y int. and so on
 Money_Word_Problems/392020: Margie is buying a car . Her June monthly interest at 12.5 percent was 195 dollars. What was Margies principal balance at the beginning of June. Use 360 days.1 solutions Answer 278227 by rfer(12644)   on 2011-01-08 17:43:46 (Show Source): You can put this solution on YOUR website!195/(0.125/12)= 195/0.0104=18,750
 Travel_Word_Problems/392035: Right angel question: at the start of driving, if i drove 9 miles west then turned left and proceeded to drive 12 miles south to end, if i drove straight line distance from start end instead, what is the straight line distance from start to end? 1 solutions Answer 278224 by rfer(12644)   on 2011-01-08 17:39:19 (Show Source): You can put this solution on YOUR website!9^2+12^2=c^2 81+144=225 sqrt 225=15 miles
 Expressions-with-variables/392046: Can you help me? Muscle movers charge \$85 plus \$40hr to move households across town, champion moving charges \$60hr for cross town moves, for what lengths of time is champion more expensive? Shelly1 solutions Answer 278223 by rfer(12644)   on 2011-01-08 17:37:01 (Show Source): You can put this solution on YOUR website!85+40x=60x 85=20x x=4.25 hrs they become equal x > 4.25 hrs
 Expressions-with-variables/392045: Can you help me? If sally and rocky travel on motorcycles toward each other from chicago and indianapolis which are 350km apart and they are biking at the rates of 110km/h and 90km/h they started at the same time, in how many hrs will they meet. Shelly1 solutions Answer 278222 by rfer(12644)   on 2011-01-08 17:33:10 (Show Source): You can put this solution on YOUR website!approach speed is 200 350/200=1.75 hrs=1 hr 45 min
 Graphs/392043: I need to find an equation of the line for the given pair of points. I am not sure how to do so. Thank you. (1/4, -1/2) and (3/4, 1)1 solutions Answer 278220 by rfer(12644)   on 2011-01-08 17:31:23 (Show Source): You can put this solution on YOUR website!slope m=(1--1/2)/(3/4-1/4) m=1.5/.5 m=3 ---------------------- y=mx+b 1=3*.75+b 1=2.25+b b=1/2.25 b=11/25 ----------------------- y=3x+11/25
 Money_Word_Problems/391963: I have to pay £32,120 to the Inland Revenue and they have allowed me to pay this at 3% per annum on monthly declining amount ( interest payable on outstanding amount only ) over a 12 month period. They say that the total repayable is £35,628,09 with 12 monthly payments of £2,669.09. Is this correct at 3% 1 solutions Answer 278211 by rfer(12644)   on 2011-01-08 16:27:16 (Show Source): You can put this solution on YOUR website!I get 2720.36 per month
 Numeric_Fractions/391986: what is the answer to: 1/2T - 4T = -0.71 solutions Answer 278210 by rfer(12644)   on 2011-01-08 16:19:03 (Show Source): You can put this solution on YOUR website!-3.5t=-0.7 t=0.2
 Numbers_Word_Problems/391997: A rectangle has an area of 120 cm square. its length and width are whole numbers. a)What are the possibilities for the two numbers? b) Which possibility gives the smallest perimeter? 1 solutions Answer 278209 by rfer(12644)   on 2011-01-08 16:16:47 (Show Source): You can put this solution on YOUR website!A) 10 x 12 B) 44 cm
 Polynomials-and-rational-expressions/392030: Hi there! Can you please help me? (6x^3+19x^2+2x-3)/(x+3) Thank you so much!1 solutions Answer 278208 by rfer(12644)   on 2011-01-08 16:14:38 (Show Source): You can put this solution on YOUR website!Here is the answer 6x^2+x-1 R of 0 I can break it down on e-mail better than here. If you want that send me a reply. Bob
 Numeric_Fractions/392009: Divide 5 2/7 by 3 1/3. Write the result in simplest form.1 solutions Answer 278207 by rfer(12644)   on 2011-01-08 16:10:27 (Show Source): You can put this solution on YOUR website!(37/7)/(10/3)= 37/7*3/10=111/70= 1 41/70
 Polynomials-and-rational-expressions/392025: Hey I need help simplifying rational expressions that have polynomials on both the denominator and the numerator Thx1 solutions Answer 278206 by rfer(12644)   on 2011-01-08 16:07:26 (Show Source): You can put this solution on YOUR website!post a problem
 Distributive-associative-commutative-properties/391850: what property is used to derive the product of say 9X4 1 solutions Answer 278092 by rfer(12644)   on 2011-01-08 02:07:51 (Show Source): You can put this solution on YOUR website!associative properties of multiplication
 Length-and-distance/391857: Find the length of the segment with endpoints L(-2,4) and M(1,-3)1 solutions Answer 278090 by rfer(12644)   on 2011-01-08 02:04:33 (Show Source): You can put this solution on YOUR website!7.6 use a^2+b^2=c^2
 Linear-equations/391863: Find the slope and y-intercept for each line that has a slope and y-intercept. x+2y=31 solutions Answer 278088 by rfer(12644)   on 2011-01-08 01:59:21 (Show Source): You can put this solution on YOUR website!2y=-x+3 y=-1/2x+3 slope m=-1/2 y int b=3/2
 Miscellaneous_Word_Problems/391904: What are the steps to reach the fraction answer to P=2L+2W for L?1 solutions Answer 278087 by rfer(12644)   on 2011-01-08 01:56:14 (Show Source): You can put this solution on YOUR website!L=(P-2W)/2
 Travel_Word_Problems/391922: If Jill is driving at 65 miles per hour, what is her approximate speed in kilometers per hour? (1 mile, 1.6 kilometers)1 solutions Answer 278086 by rfer(12644)   on 2011-01-08 01:53:53 (Show Source): You can put this solution on YOUR website!65*1.6=104 kph
 Miscellaneous_Word_Problems/391923: In Sacramento, the temperature at noon was 35 degrees Celsius (C). What was the temperature in degrees Fahrenheit (F)? (F=9/5C+32)1 solutions Answer 278085 by rfer(12644)   on 2011-01-08 01:52:49 (Show Source): You can put this solution on YOUR website!F=9/5*35+32 F=63+32 F=95 degrees F
 Rectangles/391870: If the perimeter of a rectangle is 42" and its width is 6" find its length? 1 solutions Answer 278039 by rfer(12644)   on 2011-01-07 21:47:38 (Show Source): You can put this solution on YOUR website!(42-12)/2=15
 Geometry_Word_Problems/391812: Two sides of a triangle have the same length. The third side measures 7m less than twice the common length. The perimeter of the triangle is 13m. What are the lengths of the three sides?1 solutions Answer 278008 by rfer(12644)   on 2011-01-07 19:55:35 (Show Source): You can put this solution on YOUR website!2x+2x-7=13 4x=20 x=5 2x-7=3
 Linear-systems/391805: how do you solve/ write an equation in slope-intercept form for a line that passes through the given point and is parrel to the given line y=-1/2+4x;(-3,5) 1 solutions Answer 278006 by rfer(12644)   on 2011-01-07 19:53:36 (Show Source): You can put this solution on YOUR website!5=4*-3+b 5=-12+b b=17 ------------- y=4x+17
 Expressions-with-variables/391806: the sales price of a car is 12,590 wich is 20% off the original price . what is the original price?1 solutions Answer 278005 by rfer(12644)   on 2011-01-07 19:51:14 (Show Source): You can put this solution on YOUR website!12590/0.8=15,737.50
 Linear_Equations_And_Systems_Word_Problems/391799: If p is 90% of q then q is what percent of p1 solutions Answer 278004 by rfer(12644)   on 2011-01-07 19:49:58 (Show Source): You can put this solution on YOUR website!lets use some numbers p=100*0.90 p=90 -------------- q=100 100/90=1.11=111%
 Quadratic_Equations/391830: A rectangular skating rink measuring 30m by 20m is doubled in area by adding a strip at one end of the rink and a strip of the same width along one side of the rink. Find the width of the strips if the enlarged rink is still rectangular. I tried to set up: (x+20)(x+30)=1200 Got x=10 ??? Not sure??1 solutions Answer 278001 by rfer(12644)   on 2011-01-07 19:44:18 (Show Source): You can put this solution on YOUR website!Looks good to me. Good luck
 Expressions-with-variables/391813: the city council decided to add 0.3% tax on motel and hotel rooms. if a traveler spends the night in a motel room that cost \$55 before taxes ,how much will the ciity receive in taxes from him. please bread it down. thank you1 solutions Answer 277998 by rfer(12644)   on 2011-01-07 19:23:54 (Show Source): You can put this solution on YOUR website!55*0.003=\$1.98
 Expressions-with-variables/391836: Solve by the substitution method 8x-4y= -84 4x + 45 = y 6m+n=29 m-6n=48 4x+9y=51 -4x+y=19 5x+2y=-9 -5x+y=33 1 solutions Answer 277997 by rfer(12644)   on 2011-01-07 19:17:05 (Show Source): You can put this solution on YOUR website!8x-4(4x+45)=-84 8x-16x-180=-84 -8x=96 x=-12 ---------------- 8*-12-4y=-84 -96-4y=-84 -4y=12 y=-3 ---------------- 4*-12+45=-3
 Travel_Word_Problems/391382: Two planes travel a distance of 3000 miles in opposite direction. One plane travels at 200 mph while the other plane travels at 250 mph. How long does it take before the planes pass each other1 solutions Answer 277701 by rfer(12644)   on 2011-01-06 14:12:55 (Show Source): You can put this solution on YOUR website!approaching at 450 3000/450=6.67 hrs=6 hrs 40 min
 Equations/391394: Hello, Looking for some help with the following word problem. Looking for the total number of bolts in tool bin. Person #1 takes out 1/3. Person #2 takes out 1/4 after person #1 takes out 1/3. Person #3 takes out 2/3 after person #2 takes out 1/4. There are now 6 bolts remaining in the bin, what is the total number of bolts started with. Thanks a lot in advance for the help.1 solutions Answer 277700 by rfer(12644)   on 2011-01-06 14:10:56 (Show Source): You can put this solution on YOUR website!I hope I got this right. You work these backwards. 6 is 1/3 of the last bunch left 6/(1/3)=6*3/1=18 18/(3/4)=18*4/3=24 24/(2/3)=24*3/2=36 total Be sure to check my work Bob
 Linear-systems/391393: Brianna's family spent \$134 on 2 adult tickets and 3 youth tickets at an amusment park. Max's family spent \$146 on 3 adult tickets and 2 youth tickets. What is the price of a youth ticket?1 solutions Answer 277694 by rfer(12644)   on 2011-01-06 13:50:19 (Show Source): You can put this solution on YOUR website!3y+2a=134 a=67-1.5y 2y+3a=146 -------------- 2y+3(67-1.5y)=146 2y+201-4.5y=146 -2.5y=-55 y=22 tickets ------------------ 2(22)+3a=146 3a=102 a=34 tickets
 Equations/391198: define a variable, write an equation, and solve to find each number. Eighteen less than three times a number is twice the number 1 solutions Answer 277540 by rfer(12644)   on 2011-01-05 21:44:39 (Show Source): You can put this solution on YOUR website!3x-18=2x x=18