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# Recent problems solved by 'rfer'

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 Human-and-algebraic-language/455688: A farmer wants to fence in three sides of a rectangular field with 1,000 feet of fencing. The other side of the rectangle will be the river. If the enclosed area is to be maximized, find the dimensions of the field.1 solutions Answer 312836 by rfer(12730)   on 2011-05-30 21:15:47 (Show Source): You can put this solution on YOUR website!1000/3=333.33 ft each side for max area
 Rectangles/455691: i have a rectangle. how does it relate to the golden ratio. it is 32 by 47 inches1 solutions Answer 312835 by rfer(12730)   on 2011-05-30 21:14:07 (Show Source): You can put this solution on YOUR website!32/1=x/1.618 x=51.78 The proportions do not fit the golden ratio as shown above.
 Money_Word_Problems/455654: I need help solving this word problem. I have spent the last half an hour trying out different things and cannot get the math right. Please help. Four hundred people attended a recent concert. Admission was \$10 for each adult and \$5 for each child. Ticket receipts totaled \$3250. How many children and how many adults attended the concert? All I have is: People = 400 Adult = \$10 Child = \$5 Total = \$3250.1 solutions Answer 312829 by rfer(12730)   on 2011-05-30 20:53:13 (Show Source): You can put this solution on YOUR website!a+c=400 a=400-c 10a+5c=3250 10(400-c)+5c=3250 4000-10c+5c=3250 -5c=-750 c=150 children 400-150=250 adults ------------------- 250*10=\$2500 150*5=\$750 Total=\$3250
 Equations/455651: can you help me solve using addition and multiplication principles 2/3 _ x/5 < 4/151 solutions Answer 312826 by rfer(12730)   on 2011-05-30 20:47:24 (Show Source): You can put this solution on YOUR website!-x/5 < 4/15-10/15 -x/5 < -6/15 -x < -5/15*5/1 -x < -25/15 x > 25/15 x > 1 2/3
 Travel_Word_Problems/455639: 2 people are traveling toward eachother and the distance apart is 278 miles, 1 person goes 50 mph and the other 60 mph. how much time till they meet eachother?1 solutions Answer 312824 by rfer(12730)   on 2011-05-30 20:43:40 (Show Source): You can put this solution on YOUR website!approach speed 110 278/110=2.53 hrs=2 hrs 32 min
 Evaluation_Word_Problems/455655: solve. 3x + (-4) = 261 solutions Answer 312821 by rfer(12730)   on 2011-05-30 20:36:02 (Show Source): You can put this solution on YOUR website!3x=26+4 3x=30 x=10
 Angles/455668: An angle is 50°. Which angle has the largest measurement? A. an angle congruent to the original angle B. the complement of the original angle C. the supplement of the original angle D. original angle 1 solutions Answer 312815 by rfer(12730)   on 2011-05-30 20:30:56 (Show Source): You can put this solution on YOUR website!C) 180-50=130 degrees
 Linear-equations/455629: The average salary for computer programmer is 7740 less than twice the average salary for carpenters. Combined, their average salaries are 99,000 . Determine the average salary for each of these jobs 1 solutions Answer 312793 by rfer(12730)   on 2011-05-30 18:14:11 (Show Source): You can put this solution on YOUR website!(99000+7740)/3=\$35,580 Carpenter (2*35580)-7740=\$63,420 Programer
 Volume/455607: a barrel has a radious of 1.5 ft and a height of 4 ft. calculate the volume1 solutions Answer 312790 by rfer(12730)   on 2011-05-30 18:05:30 (Show Source): You can put this solution on YOUR website!V=Pir^2h V=3.14*1.5^2*4 V=28.26 cu ft
 Probability-and-statistics/455617: In a shipment of 40 Stoves, 2 R defected. what percent is defected?1 solutions Answer 312788 by rfer(12730)   on 2011-05-30 18:02:57 (Show Source): You can put this solution on YOUR website!2/40=0.05=5%
 Quadratic_Equations/455605: what is the answer to 6xsquared-24=01 solutions Answer 312777 by rfer(12730)   on 2011-05-30 17:17:27 (Show Source): You can put this solution on YOUR website!6x^2-24=0 6x^2=24 x^2=4 x=2
 Miscellaneous_Word_Problems/455585: 1. Each year, I plant a fruit/vegetable garden in the spring. I grow a variety of things, but my BIG plantings are of tomatoes and peppers. However, getting my seeds to sprout is not as easy as you’d think…. A. This year, I seeded both peppers and tomatoes, using a total of 120 seeds. Write an equation to show this. B. I sowed nine times as many tomato seeds as pepper seeds. Write an equation to show this. C. How many tomato seeds did I plant? D. How many pepper seeds did I plant? 1 solutions Answer 312776 by rfer(12730)   on 2011-05-30 17:16:19 (Show Source): You can put this solution on YOUR website!B) x+9x=120 10x=120 D)x=12 peppers C)9x=108 toma6tos
 Geometry_Word_Problems/455593: The length of a rectangle is six times its width. If the area of the rectangle is 294in , find its perimeter1 solutions Answer 312775 by rfer(12730)   on 2011-05-30 17:12:46 (Show Source): You can put this solution on YOUR website!6x^2=294 x^2=49 x=7 -------------- 2*7+2*42= 14+84=98 in
 Travel_Word_Problems/455604: Car travels 60mph. How far will it travel in 2 1/2 hours1 solutions Answer 312774 by rfer(12730)   on 2011-05-30 17:10:10 (Show Source): You can put this solution on YOUR website!D=rt D=60*2.5 D=150 miles
 Complex_Numbers/455602: solve (x-5)2/3+3(x-5)1/3-4=0 1 solutions Answer 312773 by rfer(12730)   on 2011-05-30 17:09:17 (Show Source): You can put this solution on YOUR website!2/3x-10/3+x-5-4=0 5/3x=37/3 x=(37/3)/(5/3) x=37/3*3/5 x=22 1/5
 Inequalities/455600: the answerto -6x/5<-3x+21 solutions Answer 312765 by rfer(12730)   on 2011-05-30 16:50:02 (Show Source): You can put this solution on YOUR website!-6x<-15x+10 9x<10 x<10/9 x<1 1/9
 Length-and-distance/455596: Given the slope of a line is -3 and passes through the point (1,4), find the equation of the line in slope-intercept form? - What is the y -intercept? - What is the x- intercept?1 solutions Answer 312764 by rfer(12730)   on 2011-05-30 16:47:44 (Show Source): You can put this solution on YOUR website!4=-3*1+b b=7 y=-3x+7 --------------- x int=(2 1/3,0) y int=(0,7)
 Linear-equations/455579: How do I find the slope of a line when given an equation, such as, y=-3x-4?1 solutions Answer 312752 by rfer(12730)   on 2011-05-30 15:50:16 (Show Source): You can put this solution on YOUR website!y=mx+b m=slope m=-3
 Linear-equations/455581: How do I slove an inequality, such as, -14<7(4-6p)? Also, how do I graph its solution?1 solutions Answer 312750 by rfer(12730)   on 2011-05-30 15:48:56 (Show Source): You can put this solution on YOUR website!-14<28-42p -42<-42p 1>p
 Angles/455490: what is the supplement of an angle with measure 23 degrees1 solutions Answer 312712 by rfer(12730)   on 2011-05-30 13:10:18 (Show Source): You can put this solution on YOUR website!180-23=157 degrees
 Probability-and-statistics/455528: Of 31 college sophomores at Crocodile Community College, 15 preferred pepperoni pizza, 11 preferred supreme, and 5 preferred cheese. If we picked a college sophomore at Crocodile Community College at random, what is the probability that he or she would prefer pepperoni? Give solution exactly in reduced fraction form. 1 solutions Answer 312711 by rfer(12730)   on 2011-05-30 13:08:16 (Show Source): You can put this solution on YOUR website!15/31=
 Polynomials-and-rational-expressions/455375: Evaluate the polynomial for x=-4 2x^2-3x+31 solutions Answer 312664 by rfer(12730)   on 2011-05-30 00:14:45 (Show Source): You can put this solution on YOUR website!2*-4^2-3*-4+3 32+12+3=47
 Graphs/455369: Write the slope intercept equation for the line containing the given pair of points (-3,5) and (-1,-3), show all work.1 solutions Answer 312663 by rfer(12730)   on 2011-05-30 00:11:58 (Show Source): You can put this solution on YOUR website!m=(-3-5)/(-1--3) m=-8/2 m=-4 ------------ y=mx+b -3=-4*-1+b -3=4+b b=-7 ----------- y=-4x-7
 Average/455379: I need help with this, please. Find the equation of the line having the given slope and containing the given point. Express your answer in the form x=a,y=b or y=mx + b m= -2, (9,0)1 solutions Answer 312662 by rfer(12730)   on 2011-05-30 00:08:56 (Show Source): You can put this solution on YOUR website!y=mx+b 0=-2*9+b b=18 ----------- y=-2x+18
 Graphs/455396: determine slope of the line (-4, -2) and (-1,-1)1 solutions Answer 312661 by rfer(12730)   on 2011-05-30 00:05:45 (Show Source): You can put this solution on YOUR website!m=(-1--2)/(-1--4) m=1/3
 Volume/455350: Find the volume of a cone with radius 9m and height 6m. Use 3.141 solutions Answer 312629 by rfer(12730)   on 2011-05-29 20:24:47 (Show Source): You can put this solution on YOUR website!V=(3.14*9^2*6)/3 V=1526/3=508.7 cu m
 test/455349: A number decreased by 6 is 7. Find the number 1 solutions Answer 312626 by rfer(12730)   on 2011-05-29 19:56:27 (Show Source): You can put this solution on YOUR website!13-6=7
 Finance/455329: This is my question: At an auction, a lucky wealthy collector paid \$7,000,000 for three paintings: a Monet, a Picasso, and a van Gogh. The Monet cost \$800,000 more than the Picasso. The price of the van Gogh was \$200,000 more than twice the price of the Monet. What was the price of each painting? Thank you for your assistance.1 solutions Answer 312623 by rfer(12730)   on 2011-05-29 19:41:37 (Show Source): You can put this solution on YOUR website!x+(x+800)+2(x+800)+200=7000 x+x+800+2x+1600+200=7000 4x=7000-2600 4x=4400 x=1,100,000 P x+800=1,900,000 M 2*1900000+200000=4,000,000 V
 Mixture_Word_Problems/455330: Find an equation of variation in which y varies directly as x and the following is true. y=400 when x=60 a. x= 20/17y b. y= 3/20x c. y= 20/3x d. x= 340y 1 solutions Answer 312620 by rfer(12730)   on 2011-05-29 19:29:35 (Show Source): You can put this solution on YOUR website!C)y=20/3x
 Linear-equations/455340: -3x+8+10+-61 solutions Answer 312618 by rfer(12730)   on 2011-05-29 19:27:09 (Show Source): You can put this solution on YOUR website!-3x+12
 Linear-equations/455341: -3x+8+10+-6x1 solutions Answer 312617 by rfer(12730)   on 2011-05-29 19:26:23 (Show Source): You can put this solution on YOUR website!-9x+18