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# Recent problems solved by 'Alan3354'

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 Graphs/455017: Graph the following equations (use points to help you graph) y=-x+2 y=-5x-6 solution=(__,__)?1 solutions Answer 312396 by Alan3354(31513)   on 2011-05-28 13:12:17 (Show Source): You can put this solution on YOUR website!y=-x+2 y=-5x-6 ----------- They're straight lines so you need 2 points. y=-x+2 Pick 2 values of x and find y, any 2 values x = 0, y = 2 (0,2) x = 4, y = -2 (4,-2) Plot the 2 points, draw a line thru them. Do the same for the other eqn The intersection is the solution of the system. ----------------- dl the FREE graph software at http:www.padowan.dk Use INS and type -x + 2, then INS and -5x - 6 --------- The solution=(__,__) is not a big butt.
 Equations/454933: write an equation of the line containing the given point and parallel to the given line. Express your answer in the form y=mx+b (5,8); x+2y=3 I am not getting this for some reason can any one help? thank you so much.1 solutions Answer 312353 by Alan3354(31513)   on 2011-05-28 07:11:20 (Show Source): You can put this solution on YOUR website!write an equation of the line containing the given point and parallel to the given line. Express your answer in the form y=mx+b (5,8); x+2y=3 --------------- The slope of lines parallel is the same, only the y-intercept is different. Sub 5&8 for x & y: 5 + 2*8 = 21 x + 2y = 21 is the equation. --------------------- y = (-1/2)x + 21/2 in slope-intercept form
 Age_Word_Problems/454963: I need help on this question. I know the answer but i dont understand how to get to it...thanks if you could reply this THE QUESTION IS: When i was 14 my mother was 41, and she is now twice as old as am. how old am i? the answer is 27 i know but how do u get to it...thanks, RACHEL 1 solutions Answer 312351 by Alan3354(31513)   on 2011-05-28 07:07:03 (Show Source): You can put this solution on YOUR website!The age difference will always be 27. For the mother to be 2x, it has to be 27 & 54.
 Equations/454967: Hey i really need help with this maths problem Heres the question: For what values of x is the following undefined. 2x-7/4x^2-161 solutions Answer 312349 by Alan3354(31513)   on 2011-05-28 07:03:38 (Show Source): You can put this solution on YOUR website!The values that make the denominator zero.
 Linear-systems/454936: find the solution of system of equations seperate x and y x-2y=-23 x-y=71 solutions Answer 312348 by Alan3354(31513)   on 2011-05-28 07:01:59 (Show Source): You can put this solution on YOUR website!x-2y=-23 x-y=7 ------ Subtract -y = -30 You can finish it.
 Travel_Word_Problems/454939: A LEIBHERR t282b the world's largest dump trucks is hauling debris at a mining site .on its first trip it hauls away 360 tons of rubble .on its second trip it hauls away 300 tons of rubble .if it hauls an average of 350 tons of rubble for all three trips, how much rubble did it haul on its last trip?{A full 5-step solution is not required ,but do show your work} 1 solutions Answer 312347 by Alan3354(31513)   on 2011-05-28 07:00:07 (Show Source): You can put this solution on YOUR website!Hint: 3 trips with an average of 350 per trip = a total of 1050 tons.
 Problems-with-consecutive-odd-even-integers/454962: if the sum of two consecutive odd integer is 76 find the number1 solutions Answer 312346 by Alan3354(31513)   on 2011-05-28 06:56:25 (Show Source): You can put this solution on YOUR website!76/2 = 38, the center --> 37 & 39
 Probability-and-statistics/454961: 1 solutions Answer 312345 by Alan3354(31513)   on 2011-05-28 06:55:18 (Show Source): You can put this solution on YOUR website!I think it's 1 problem per post. That's more than 1.
 Probability-and-statistics/454960: 1 solutions Answer 312344 by Alan3354(31513)   on 2011-05-28 06:54:41 (Show Source): You can put this solution on YOUR website!Show your efforts.
 Probability-and-statistics/454959: 1 solutions Answer 312343 by Alan3354(31513)   on 2011-05-28 06:53:56 (Show Source): You can put this solution on YOUR website!It's not likely anyone will do 20 problems.
 logarithm/454968: 4+5e^-x = 0 all I can come up with is there is no solution or x = .223 I don't have a good feeling about either one, I'm just stumped on this one. I would appreciate any help I can get! Thanks!!1 solutions Answer 312342 by Alan3354(31513)   on 2011-05-28 06:52:20 (Show Source): You can put this solution on YOUR website!4+5e^-x = 0 5e^-x = -4 e^-x = -4/5 No solution
 percentage/454869: The market bought grapes for \$0.87 a pound and sold them for \$1.15 a pound. What is the percent of increase rounded to the nearest tenth?1 solutions Answer 312288 by Alan3354(31513)   on 2011-05-27 19:32:55 (Show Source): You can put this solution on YOUR website!Difference = 115 - 87 = \$0.38 Use 87 as the base because that's the price to start 38/87 = 0.43678 --> 43.7%
 Graphs/454864: use rational exponents to write x^1/2*y^1/8*z^1/6 as a singel radical expression1 solutions Answer 312286 by Alan3354(31513)   on 2011-05-27 19:29:33 (Show Source): You can put this solution on YOUR website!use rational exponents to write x^1/2*y^1/8*z^1/6 as a singel radical expression LCD of 2, 8 and 6 = 24 = = =
 Functions/454860: I'm confused about this problem [2(r-s)]2?1 solutions Answer 312284 by Alan3354(31513)   on 2011-05-27 19:24:22 (Show Source): You can put this solution on YOUR website!Me too. You didn't say what the problem is, what you want to do.
 Radicals/454834: How do you solve this step by step? I haven't quite understood radicals yet.1 solutions Answer 312235 by Alan3354(31513)   on 2011-05-27 16:12:16 (Show Source): You can put this solution on YOUR website!It's not an equation, so you don't solve it. = ----------------- Divide the exponents by 2
 Complex_Numbers/454700: solve (3+7i)-(-8+6i) and show work1 solutions Answer 312215 by Alan3354(31513)   on 2011-05-27 12:00:02 (Show Source): You can put this solution on YOUR website!solve (3+7i)-(-8+6i) and show work ------------ Equations are solved, this is not one. Add them. (3+7i)-(-8+6i) = (3+7i) + (8-6i) Add the 3 & 8 = 11 7i - 6i = i --> 11 + i
 Geometry_Word_Problems/454764: Suppose there are two cubes, with the first cube having a side of h, and the second cube having a side of 5h. What is the relation of the volume of the first cube to the volume of the second1 solutions Answer 312212 by Alan3354(31513)   on 2011-05-27 11:50:56 (Show Source): You can put this solution on YOUR website!Volume = h^3 Volume is a function of the cube of the linear dimension. 5*s ---> 5^3*s = 125 times
 Travel_Word_Problems/454757: Hi there, my question is "To prevent turbulences caused by wake vortices, starting aircraft have to maintain a minimum distance of 12.25 miles from airborne aircraft. What is this converted into seconds assuming an average take off speed of 175mph?" Laymans terms and the relevant algebra would be a huge help! Regards Pete M1 solutions Answer 312211 by Alan3354(31513)   on 2011-05-27 11:45:39 (Show Source): You can put this solution on YOUR website!12.25 miles/175 mph = 0.07 hours = 0.07*60*60 = 252 seconds ------------- It's to prevent damage from turbulence, it doesn't prevent turbulence.
 Rate-of-work-word-problems/453590: How many hours would it take 3 men to paint 11000 sf of space? 1 solutions Answer 312056 by Alan3354(31513)   on 2011-05-26 16:20:11 (Show Source): You can put this solution on YOUR website!It's not possible to paint space.
 Volume/454481: What is the volume of a cone that has a radius of 2 mm and a hight of 10 mm?1 solutions Answer 312055 by Alan3354(31513)   on 2011-05-26 16:19:14 (Show Source):
 Pythagorean-theorem/454419: If AB = 4 inches, which does AC equal? (on a 30, 60, 90 triangle) A. 2 inches B. 4 inches C. 6 inches D. 8 inches 1 solutions Answer 312052 by Alan3354(31513)   on 2011-05-26 16:13:29 (Show Source): You can put this solution on YOUR website!It depends on which angles are opposite sides AB and AC
 Circles/454473: what is circumfrance and the area if the radius is 9 3/4 ?1 solutions Answer 312050 by Alan3354(31513)   on 2011-05-26 16:05:37 (Show Source): You can put this solution on YOUR website!C = 2*pi*r Area = pi*r^2
 Square-cubic-other-roots/454475: Cube root equations how do you solve cube root equations? Such as: cube root 16 times cube root 4y to the 3rd power? tinaboileau19@gmail.com1 solutions Answer 312048 by Alan3354(31513)   on 2011-05-26 15:55:43 (Show Source): You can put this solution on YOUR website!how do you solve cube root equations? Such as: cube root 16 times cube root 4y to the 3rd power? ---------------- like that? 1st, it's not an equation, there's no equal sign, so there's nothing to solve. It can be simplified some. = = = 4y
 Linear-equations/454476: I am struggling to find out the slope of the following; 2y - x = 3 I get to y = 1/2x, but am not getting the right answer for the y-intercept.1 solutions Answer 312046 by Alan3354(31513)   on 2011-05-26 15:52:09 (Show Source): You can put this solution on YOUR website!2y - x = 3 Solve for y 2y = x + 3 y = (1/2)x + 3/2 slope = 1/2 y-int = 3/2
 Systems-of-equations/454328: what is the Y and X intercept for the following equation Y=x^3-16x i thought i should use foil to find X so i set y=0 but i am stuck trying to factor x^1 solutions Answer 311970 by Alan3354(31513)   on 2011-05-26 09:17:00 (Show Source): You can put this solution on YOUR website! x = 0 ------------ x = ± 4
 Rational-functions/454306: A plane flies 400 miles in 5 hours against the wind and returns the 400 miles in 2 hours with the wind. What is the speed of the wind?1 solutions Answer 311961 by Alan3354(31513)   on 2011-05-26 07:43:27 (Show Source): You can put this solution on YOUR website!400/5 = 80 mph 400/2 = 200 mph -------------- Windspeed = (200-80)/2 = 60 mph
 Quadratic-relations-and-conic-sections/454238: (x+6)^2_______(y-4)^2 -------------- + ---------------- = 1 ___12__________ 16 this is a ellipse formula. find the vertices and foci coordintes. (the dash marks are fractions, the underscores are nothing, it wouldnt let me format it properly. THANKS FOR TRYING!1 solutions Answer 311938 by Alan3354(31513)   on 2011-05-25 23:33:28 (Show Source): You can put this solution on YOUR website! Use braces { and }, 3 on each end, to format. Long axis is "vertical", parallel to the y-axis (16>12) Center at (-6,4) Distance from center to foci = sqrt(16 - 12) = 2 Foci at (-6,2) and (-6,6) ----------------------- Vertices at center +/- sqrt(16) vertically --> (-6,0) & (-6,8) Vertices at center +/- sqrt(12) horizontally --> (-6-sqrt(12),4) & (-6+sqrt(12),4)
 Quadratic-relations-and-conic-sections/454235: Formula for an ellipse= (x+1)^24(y+3)^2=1 what are the vertices and foci of this ellipse1 solutions Answer 311936 by Alan3354(31513)   on 2011-05-25 23:17:31 (Show Source): You can put this solution on YOUR website!Formula for an ellipse= (x+1)^24(y+3)^2=1 what are the vertices and foci of this ellipse ------------- Do you mean (x+1)^2 + 4(y+3)^2=1 ? (x+1)^2/1 + (y+3)^2/0.25 = 1 a^2 = 1, b^2 = 1/4 Center at (-1,-3), long axis parallel to the x-axis ----------------- Distance to foci = sqrt(a^2 - b^2) = sqrt(0.75) Foci at (-1-sqrt(0/75),-3) and (-1+sqrt(0.75,-3) ---------- Vertices 1 unit from center parallel to x-axis and 1/2 unit vertical --> (-2,-3) and (0,-3) and (-1,-3.5) and (-1,-2.5)
 Trigonometry-basics/454237: what is the phase shift and period of the following: y=-3sin(4x+pi/2) 1 solutions Answer 311934 by Alan3354(31513)   on 2011-05-25 22:59:01 (Show Source): You can put this solution on YOUR website!Shift = -pi/2 Period = pi/8
 Radicals/454144: I am trying to understand how to further reduce : 6 over 3rd root 3 can and how can I do this ?1 solutions Answer 311904 by Alan3354(31513)   on 2011-05-25 19:38:43 (Show Source):