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# Recent problems solved by 'rfer'

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 Angles/225534: i need help with this question " angle A is three times as large as its supplemeny, angle b"1 solutions Answer 168261 by rfer(12670)   on 2009-10-12 18:07:08 (Show Source): You can put this solution on YOUR website!x+3x=180 4x=180 x=45 degrees (B) 3x=135 degrees (A)
 Problems-with-consecutive-odd-even-integers/225530: what's the sales tax for \$9.75 if the tax rate is 3%?1 solutions Answer 168259 by rfer(12670)   on 2009-10-12 18:04:51 (Show Source): You can put this solution on YOUR website!9.75*.03=\$0.29
 Triangles/225524: A triangle has an Area of 27 square inches. The height of the triangle is 1 1/2 times its base. Find the base and height of the triangle.1 solutions Answer 168257 by rfer(12670)   on 2009-10-12 18:02:19 (Show Source): You can put this solution on YOUR website!27=.5(1.5x)x 27=.75x*x 27=.75x^2 36=x^2 x=6 in
 Surface-area/225526: if the height of a cylinder is 8in. and the radius is 2.5in what is the volume to the nearest cubic inch1 solutions Answer 168254 by rfer(12670)   on 2009-10-12 17:59:05 (Show Source): You can put this solution on YOUR website!V=pir^2(h) V=3.14(2.5^2)8 V=157 cu in
 Numbers_Word_Problems/225414: Translate but do not solve: Six times the difference between a value and twelve is equal to one-half that number.1 solutions Answer 168198 by rfer(12670)   on 2009-10-12 15:05:50 (Show Source): You can put this solution on YOUR website!6(x-12)=.5x
 Money_Word_Problems/225408: your friend works as a waitress at alocal resturaunt. her income consists of an hourly wage plus tips. on wednesday your friend earned \$25 in tips over a 5 hour period. on friday your friend earned \$30.76 in tips over a 3 hour period. how much is your friends hourly wage if your friend earned the same amount of money on wed. as on friday 1 solutions Answer 168195 by rfer(12670)   on 2009-10-12 15:00:41 (Show Source): You can put this solution on YOUR website!25+5x=30.76+3x 2x=5.76 x=\$2.88 per hr
 Numbers_Word_Problems/225413: Translate and solve: Thirty-five more than six time a nuber is the same as fifteen less than the same number. Find the missing value?1 solutions Answer 168193 by rfer(12670)   on 2009-10-12 14:57:05 (Show Source): You can put this solution on YOUR website!6x+35=x-15 5x=-50 x=-10
 Equations/225411: how do i solve this equation x-{x-[x-(x-1)]} what rule do i use please help?1 solutions Answer 168191 by rfer(12670)   on 2009-10-12 14:54:12 (Show Source): You can put this solution on YOUR website!It looks like the answer is +1 work your way from the inside out
 Equations/225393: Solve for x 5(x-100)=2(x-100)+21 1 solutions Answer 168188 by rfer(12670)   on 2009-10-12 14:44:08 (Show Source): You can put this solution on YOUR website!5(x-100)=2(x-100)+21 5x-500=2x-200+21 3x=321 x=107
 Graphs/225395: please help me find the y intercept and x intercept for this equation; 16y-4x=-81 solutions Answer 168187 by rfer(12670)   on 2009-10-12 14:41:25 (Show Source): You can put this solution on YOUR website!y int is when x=0 (0,-1/2) x int is when y=0 (2,0) 16y-4x=-8 16y-4(0)=-8 y=-1/2 ---------------- 16(0)-4x=-8 x=2
 Money_Word_Problems/225401: Nancy Johnson invested \$18,000. Part of it was invested at 3% annual simple interest, and the rest was invested at 4%. Her interest income for the first year was \$650. How much did she invest at each rate? This is what I tried: 3x + 4y = 650; y=18x 3(18y) + 4y = 650 54y + 4y = 650 = 58y =650, y=11.206896 I got lost from there because when that would make X something not nice. Please help me? 1 solutions Answer 168184 by rfer(12670)   on 2009-10-12 14:37:17 (Show Source): You can put this solution on YOUR website!.03x+.04(18000-x)=650 .03x+720-.04x=650 -.01x=-70 x=\$7000 in 3% 18000-x=\$11000 in 4%
 Polynomials-and-rational-expressions/225367: -6x=42 2(n-3)=241 solutions Answer 168176 by rfer(12670)   on 2009-10-12 13:28:58 (Show Source): You can put this solution on YOUR website!-6x=42 x=-42/6 x=-7 ---------- 2(n-3)=24 2n-6=24 2n=30 n=15
 test/225359: it costs matt a little more than 4 dollars a day to feed his dog. how much does it cost him to feed his dog for a year?1 solutions Answer 168175 by rfer(12670)   on 2009-10-12 13:27:05 (Show Source): You can put this solution on YOUR website!365*4 x>\$1460
 Human-and-algebraic-language/225364: Joe's gas tank is 1/2 full.After he adds 5 gallons it is 5/6 full. How many gallons can Joe's tank hold?1 solutions Answer 168173 by rfer(12670)   on 2009-10-12 13:23:46 (Show Source): You can put this solution on YOUR website!5=2/6 2.5=1/6 2.5*6=15 gal
 Miscellaneous_Word_Problems/225345: Company A rents copiers for a monthly charge of \$200 plus 8 cents per copy. Company B rents copiers for a monthly charge of \$400 plus 4 cents per copy. What is the number of copies above which Company A's charges are the higher of the two?1 solutions Answer 168172 by rfer(12670)   on 2009-10-12 13:20:21 (Show Source): You can put this solution on YOUR website!200+.08x=400+.04x .04x=200 x=5000 copies 200+.08*5000=\$600 400+.04*5000=\$600
 expressions/225046: How to simplify: 20*(-c)1 solutions Answer 168065 by rfer(12670)   on 2009-10-11 20:56:47 (Show Source): You can put this solution on YOUR website!-20c
 Miscellaneous_Word_Problems/225126: A plumer gave an estimate for the renovation of a kitchen. Her hourly pay is \$27 per hour and the plumbing parts will cost \$80. If her total estimate is \$404, how many hours does she expect this job to take?1 solutions Answer 168063 by rfer(12670)   on 2009-10-11 20:54:15 (Show Source): You can put this solution on YOUR website!404-80=324/27=12 hrs
 Surface-area/225121: A rancher is going to construct a new rectangular pen for his emu farm. If he has 5200 feet of fencing, what is the maximum area of the pen?1 solutions Answer 168061 by rfer(12670)   on 2009-10-11 20:52:03 (Show Source): You can put this solution on YOUR website!P=2w+2l a square is the largest area. 5200/4=1300 A=1300*1300 A=1,690,000sq ft
 expressions/225047: How to simplify: 20*(-c)1 solutions Answer 168060 by rfer(12670)   on 2009-10-11 20:47:08 (Show Source): You can put this solution on YOUR website!-20c
 Systems-of-equations/225066: 5[1/2x+1]=-10 is the answer x=-61 solutions Answer 168058 by rfer(12670)   on 2009-10-11 20:34:02 (Show Source): You can put this solution on YOUR website!5(1/2x+1)=-10 2.5x+5=-10 2.5x=-10-5 2.5x=-15 x=-6 Your a winner!!!!!!!!!! Bob
 expressions/225104: How to solve (3x4y)^21 solutions Answer 168053 by rfer(12670)   on 2009-10-11 20:25:16 (Show Source): You can put this solution on YOUR website!9x^2 16y^2
 Distributive-associative-commutative-properties/225111: 1/4(24-1/4) using distributive property ...thank you1 solutions Answer 168052 by rfer(12670)   on 2009-10-11 20:23:37 (Show Source): You can put this solution on YOUR website!1/4*96/4-1/4 96/16-4/16 92/16=5 3/4
 Triangles/225108: The hypotenuse of a right triangle is 5 inches. The lengths of the two legs are given by two consecutive integers. Find the lengths of the two legs.1 solutions Answer 168050 by rfer(12670)   on 2009-10-11 20:20:30 (Show Source): You can put this solution on YOUR website!This is a triple A good ole 3, 4, 5 triangle
 Rectangles/225080: if perimeter is 48 and width = 1/2 length +2 what are dimensions1 solutions Answer 168046 by rfer(12670)   on 2009-10-11 20:16:40 (Show Source): You can put this solution on YOUR website!P=2w+2L 48=2(.5L+2)+2L 48=L+4+2L 48=3L+4 44=3L L=14.66 w=9.33
 Miscellaneous_Word_Problems/225101: Please help me answer this question. Why must the rules for the order of operations be understood before solving an equation?1 solutions Answer 168039 by rfer(12670)   on 2009-10-11 20:07:00 (Show Source): You can put this solution on YOUR website!If you don't follow the rules of operations you will get the wrong answers.
 Quadratic_Equations/225082: graph the line containing the given pair of points and find the slope. (-4,2), (1,-3)1 solutions Answer 168037 by rfer(12670)   on 2009-10-11 20:05:16 (Show Source): You can put this solution on YOUR website!slope=m=1
 expressions/225089: what is 9p-3(5p+2)+61 solutions Answer 168035 by rfer(12670)   on 2009-10-11 20:02:26 (Show Source): You can put this solution on YOUR website!9p-3(5p+2)+6 9p-15p-6+6 -6p
 Numbers_Word_Problems/225091: I need to find two consecutive even intergers that sum 66.It would also help if i knew the formula to solving this.1 solutions Answer 168032 by rfer(12670)   on 2009-10-11 19:55:26 (Show Source): You can put this solution on YOUR website!x+2+x=66 2x=64 x=32 x+2=34
 Graphs/225028: solve. -6x is greater than or equal to -3.01 solutions Answer 168003 by rfer(12670)   on 2009-10-11 18:12:50 (Show Source): You can put this solution on YOUR website!x>=1/2
 real-numbers/225018: find the product of -3(-5)(-4X), justify the steps 1 solutions Answer 168002 by rfer(12670)   on 2009-10-11 18:11:32 (Show Source): You can put this solution on YOUR website!-3(-5)(-4x) +15(-4x) -60x
 test/225020: Find the equation of the line that contains the point (0, –7) and has the slope –5.1 solutions Answer 168000 by rfer(12670)   on 2009-10-11 18:08:10 (Show Source): You can put this solution on YOUR website!y=mx+b y=-5x-7