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# Recent problems solved by 'rfer'

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 Angles/311166: Find the supplementary angle of the given angle. 148.7˚1 solutions Answer 222546 by rfer(12657)   on 2010-06-03 21:35:50 (Show Source): You can put this solution on YOUR website!180-148.7=31.3 degrees
 Travel_Word_Problems/311178: if you travel at an average speed of 50 miles per hour, how far will you travel in 5 (3/5) hours? 1 solutions Answer 222544 by rfer(12657)   on 2010-06-03 21:34:25 (Show Source): You can put this solution on YOUR website!50*5.8=290 miles
 Square-cubic-other-roots/310811: how do you solve this problem: square root of 25 divided by the square root of 1281 solutions Answer 222300 by rfer(12657)   on 2010-06-02 20:57:33 (Show Source): You can put this solution on YOUR website!do the math first 128/25=5.12 sq rt 5.12= 2.2627
 Linear-equations/310806: write the slope intercept equation for the line containing the givwn pair of points. (2,3) and (4,1)1 solutions Answer 222298 by rfer(12657)   on 2010-06-02 20:54:44 (Show Source): You can put this solution on YOUR website!y=-x+5
 Equations/310425: The realtion between Celsius and Fahrenheit scale of temperatures is given by:C=(5/9)(F - 32), or, F = (9/5)C +32. Calulate the temperature in Celsius if the temperature in Fahrenheit is 45 F. also, calculate the temperature in Fahrenheit if the temperature in Celsius is 98o C.1 solutions Answer 222047 by rfer(12657)   on 2010-06-01 21:48:59 (Show Source): You can put this solution on YOUR website!C=(5/9)(F-32) C=(5/9)(45-32) C=(5/9)*13 C=65/9 C=7.22 degrees
 Volume/310434: what is the volume of a cylinder if the diameter of its base is 6 yards and the height is 4 yards? 1 solutions Answer 222042 by rfer(12657)   on 2010-06-01 21:44:55 (Show Source): You can put this solution on YOUR website!pir^2h 3.14*3^2*4 V=113.04 cu yrds
 Evaluation_Word_Problems/310516: the use seante has 100 memebers after a certain election, there were 4 more democrats than Republicans with no other parties represented how many members of each party were ther in the senate1 solutions Answer 222039 by rfer(12657)   on 2010-06-01 21:41:52 (Show Source): You can put this solution on YOUR website!x+x+4=100 2x=96 x=48 R x+4=52 D
 Percentage-and-ratio-word-problems/310401: Find two numbers whose sum is 160 and that have the ratio 5:3.1 solutions Answer 221952 by rfer(12657)   on 2010-06-01 18:08:26 (Show Source): You can put this solution on YOUR website!5x+3x=160 8x=160 x=20 5x=100 3x=60
 Linear_Equations_And_Systems_Word_Problems/310439: If a saleman is paid a fixed weekly salary of \$400 plus a commission of 8% of his total sales revenue, how can it be written in a linear function expressing the saleman's weekly income as a function of the amount of sales revenue at what rate does the saleman's income change with respect to the sale revenue?1 solutions Answer 221951 by rfer(12657)   on 2010-06-01 18:05:52 (Show Source): You can put this solution on YOUR website!400+.08sslea=wages
 Rectangles/310209: The perimeter of a rectangle is 48 and the width is half the length. What are its dimensions?1 solutions Answer 221841 by rfer(12657)   on 2010-05-31 21:18:59 (Show Source): You can put this solution on YOUR website!2x+2(2x)=48 2x+4x=48 6x=48 x=8 2x=16
 Mixture_Word_Problems/310181: University Theater sold 494 tickets for a play. Tickets cost \$25 per adult and \$10 per senior citizen. If total reciepts were \$7100, how many senior citizen tickets were sold?1 solutions Answer 221840 by rfer(12657)   on 2010-05-31 21:17:22 (Show Source): You can put this solution on YOUR website!a+s=494 a=494-s 25a+10s=7100 25(494-s)+10s=7100 12350-25s+10s=7100 -15s=-5250 s=350 350*10=\$3500 494-350=144 adults 144*25=\$3600
 Angles/310141: If two complementary angles have measures in the ratio of 1 to 5. Find the measure of each angle? 1 solutions Answer 221838 by rfer(12657)   on 2010-05-31 21:11:18 (Show Source): You can put this solution on YOUR website!90/6=15 degrees 5*15=75 degrees
 Rectangles/310071: The perimeter of a rectangular park is 300 feet. The length of the park is 100 feet longer than the width. Find the length of the park.1 solutions Answer 221797 by rfer(12657)   on 2010-05-31 17:00:39 (Show Source): You can put this solution on YOUR website!2w+2(w+100)=300 2w+2w+200=300 4w=100 w=25 ft L=125 ft
 Miscellaneous_Word_Problems/310074: 2036 concert tickets were sold for a total of \$42,332. If students paid \$15 and nonstudents paid \$23, how many student tickets were sold?1 solutions Answer 221794 by rfer(12657)   on 2010-05-31 16:58:10 (Show Source): You can put this solution on YOUR website!s+ns=2036 ns=2036-s 15s+23ns=42332 15s+23(2036-s)=42332 15s+46828-23s=42332 -8s=-4496 s=562 ----------------- ns=2036-562 ns=1474 ------------- 15(562)+23(1474)=42332 8430+33902=42332
 Travel_Word_Problems/310103: Mildred left camp 4 hours after margret did. they travelled in oposite directions. mildred drove at 30 Miles an hour, margeret at 45 miles an hour. how many hours after mildred left are the two girls 630 miles apart?1 solutions Answer 221791 by rfer(12657)   on 2010-05-31 16:51:24 (Show Source): You can put this solution on YOUR website!M is 120 miles ahead moving apart at 75 mph 630-120=510 510/75=6.8 hrs 4+6.8=10.8 hrs=10 hrs 48 min
 Percentage-and-ratio-word-problems/309991: A salesman monthly gross pat consists of \$1,200 plus 20% of the dollar amount of his sales. If his gross pay for one month was \$2,500, what was the dollar amount of his sales for that month ? 1 solutions Answer 221759 by rfer(12657)   on 2010-05-31 12:14:45 (Show Source): You can put this solution on YOUR website!2500-1200=1300 1300/.2=\$6500
 Percentage-and-ratio-word-problems/310018: if 6 out of 35 students received A's, what percentage of the class did not receive A's?1 solutions Answer 221758 by rfer(12657)   on 2010-05-31 12:11:23 (Show Source): You can put this solution on YOUR website!29/35=.83 83%
 Rational-functions/310015: how do i find the ratio of 45:3151 solutions Answer 221756 by rfer(12657)   on 2010-05-31 12:09:53 (Show Source): You can put this solution on YOUR website!reduce like a fraction to 1/7 or 14.3% chance or 1:7 or one out of seven
 Money_Word_Problems/310050: please help, I don't know how to do this: find the value of \$2500 invested at 4.5% annual interest for 10 years if interest is compounded quarterly, continuously1 solutions Answer 221755 by rfer(12657)   on 2010-05-31 12:03:32 (Show Source): You can put this solution on YOUR website!A=P(1+r/n)^nt A=2500(1+.045/4)^4*10 A=2500(1.01125)^40 A=2500(1.5643769) A=\$3910.94 ----------------- A=Pe^rt A=2500(2.7183)^0.045*10 A=2500(1.5832277) A=\$3958.07
 Radicals/309672: Guy wire. If a guy wire of length 40 feet is attached to an antenna at a height of 30 feet, the how far from the base of the antenna is the wire attached to the ground?1 solutions Answer 221528 by rfer(12657)   on 2010-05-29 23:43:06 (Show Source): You can put this solution on YOUR website!40^2-30^2=a^2 1600-900=700 a=26.46 ft
 Radicals/309673: Long guy wires. The manufacturer of an antenna recommends that guy wires from the top of the antenna to the ground be attched to the ground at a distance from the base equal to the height of the antenna. How long would the guy wires be fore a 200-foot antenna?1 solutions Answer 221526 by rfer(12657)   on 2010-05-29 23:39:58 (Show Source): You can put this solution on YOUR website!282.84 ft
 Rate-of-work-word-problems/309685: The length of a new rectangular playing field is 6 yards longer than triple the width. If the perimeter of the rectangular playing field is 492 yards. What are the dimensions?1 solutions Answer 221525 by rfer(12657)   on 2010-05-29 23:37:55 (Show Source): You can put this solution on YOUR website!2x+2(3x+6)=492 2x+6x+12=492 8x=480 x=60 yds 3x+6=186 yds
 Word_Problems_With_Coins/309710: The St. Mark Community babecue served 250 dinners. Achilds plate cost \$3.50 and an adult plate is \$7.00. A total of \$1347.50 was collected. How many of each type of plate was served? Please show work. Thanks1 solutions Answer 221522 by rfer(12657)   on 2010-05-29 23:33:39 (Show Source): You can put this solution on YOUR website!c+a=250 c=250-a 3.5c+7a=1347.5 3.5(250-a)+7a=1347.5 875-3.5a+7a=1347.5 3.5a=472.5 a=135 adults c=250-135 c=115 children proof 3.5*115+7*135=\$ 402.5+945=\$1347.50
 expressions/309714: 2/3(7/8-4x)- 5/8= 3/81 solutions Answer 221519 by rfer(12657)   on 2010-05-29 23:26:24 (Show Source): You can put this solution on YOUR website!2/3(7/8-4x)-5/8=3/8 14/24-8x/3-5/8=3/8 14/24-8x/3=8/8 -8x/3=24/24-14/24 -8x/3=10/24 -8x=(10/24)(3/1) -8x=30/24 x=(30/24)/(-8/1) x=30/24*-1/8 x=-30/192 x=-5/32
 Linear-systems/309722: 3y+3(1-y)-y=61 solutions Answer 221518 by rfer(12657)   on 2010-05-29 23:18:42 (Show Source): You can put this solution on YOUR website!3y+3(1-y)-y=6 3y+3-3y-y=6 -y=3 y=-3
 Average/309723: 7y-3(y+6)=101 solutions Answer 221517 by rfer(12657)   on 2010-05-29 23:17:23 (Show Source): You can put this solution on YOUR website!7y-3(y+6)=10 7y-3y-18=10 4y=28 y=7
 Average/309725: 6y/8+12=841 solutions Answer 221516 by rfer(12657)   on 2010-05-29 23:16:15 (Show Source): You can put this solution on YOUR website!6y/8+12=84 6y/8=72 6y=576 y=96
 Average/309726: 2(3-4y)=-101 solutions Answer 221514 by rfer(12657)   on 2010-05-29 23:14:48 (Show Source): You can put this solution on YOUR website!2(3-4y)=-10 6-8y=-10 -8y=-16 y=2
 Average/309727: 6y+9+4y=-31 solutions Answer 221513 by rfer(12657)   on 2010-05-29 23:13:47 (Show Source): You can put this solution on YOUR website!6y+9+4y=-3 10y=-12 y=-1 1/5
 Evaluation_Word_Problems/308693: A driver who drives at a speed of r mph for t hr will travel d mi given by d=rt mi. How far will a driver travel at a speed of 57 mph for 8 hrs.1 solutions Answer 220737 by rfer(12657)   on 2010-05-26 12:13:10 (Show Source): You can put this solution on YOUR website!57*8=456 miles
 Inequalities/308480: what is greater -2 0r -51 solutions Answer 220573 by rfer(12657)   on 2010-05-25 18:52:29 (Show Source): You can put this solution on YOUR website!-2 is greater, it is nearer positive values