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# Recent problems solved by 'Alan3354'

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 Exponents/429584: Rewrite the expression using positive exponents 2x/y^-21 solutions Answer 298363 by Alan3354(30993)   on 2011-03-31 13:02:29 (Show Source): You can put this solution on YOUR website!Rewrite the expression using positive exponents 2x/y^-2 ----------------- Multiply NUM and DEN by y^2 = = -------------- As a shortcut, moving a factor or term from the NUM to the DEN or vice versa changes its sign.
 Square-cubic-other-roots/429560: I have to explain in one paragraph how to simplify, 1.) 16 1/2 2.) square root of 1001 solutions Answer 298357 by Alan3354(30993)   on 2011-03-31 12:54:48 (Show Source): You can put this solution on YOUR website!I have to explain in one paragraph how to simplify, 1.) 16 1/2 = 16.5 or 33/2 ?? ------------ 2.) square root of 100 = ± 10 10*10 = 100 (-10)*(-10) = 100 ----------- Short paragraphs.
 Trigonometry-basics/429492: cosx*tgx+sin2x=21 solutions Answer 298356 by Alan3354(30993)   on 2011-03-31 12:52:32 (Show Source): You can put this solution on YOUR website!Is sin2x sin(2x), or sin^2(x) ?? I assume tgx means tan(x)
 Age_Word_Problems/429575: find two consecutive even numbers whose sum is 66 1 solutions Answer 298353 by Alan3354(30993)   on 2011-03-31 12:39:54 (Show Source): You can put this solution on YOUR website!66/2 = 33, the center --> 32 & 34
 Problems-with-consecutive-odd-even-integers/429489: i am the largest of three consecutive numbers whose product is 366 1 solutions Answer 298333 by Alan3354(30993)   on 2011-03-31 10:41:18 (Show Source): You can put this solution on YOUR website!i am the largest of three consecutive numbers whose product is 366 ------------ =~ 7 the middle 6*7*8 = 336 7*8*9 = 504 ------------- I think you meant 336
 Numeric_Fractions/429538: 1/7 + 12/x1 solutions Answer 298325 by Alan3354(30993)   on 2011-03-31 10:12:44 (Show Source): You can put this solution on YOUR website!Do you have a question?
 Radicals/428450: Hello. I am having serious difficulties with the following problem; I must have tried solving it a few times, but my answer is still very different from the book. Please help me solve it. Thank you. [(x-y)/({(x)^(3)*y}-{2(x)^(2)*(y)^(2)}+{x*(y)^(3)})]^(1/2)1 solutions Answer 297807 by Alan3354(30993)   on 2011-03-28 22:04:10 (Show Source): You can put this solution on YOUR website!There's nothing to solve, it's not an equation. Maybe you want to simplify it ? ---------------- = = = =
 Exponential-and-logarithmic-functions/428452: ln2.5x=101 solutions Answer 297806 by Alan3354(30993)   on 2011-03-28 21:49:48 (Show Source): You can put this solution on YOUR website!ln(2.5x)=10 Is that what you mean? ---------- x =~ 8810.586
 Square-cubic-other-roots/428433: how do u get 289 times 48? 1 solutions Answer 297805 by Alan3354(30993)   on 2011-03-28 21:46:02 (Show Source): You can put this solution on YOUR website!I use a calculator
 Surface-area/428438: what is the length and width of a rectangle whose area is 648 1 solutions Answer 297803 by Alan3354(30993)   on 2011-03-28 21:45:22 (Show Source): You can put this solution on YOUR website!Not enough info There are an infinite number of solutions L*W = 648 1*648 2*324 3*216 4*162 etc
 Linear-systems/428377: 2x+y=41 1 solutions Answer 297776 by Alan3354(30993)   on 2011-03-28 20:26:01 (Show Source): You can put this solution on YOUR website!Do you have a question?
 Polynomials-and-rational-expressions/428393: Factor each polynomial twice 12x^ - 28x - 241 solutions Answer 297775 by Alan3354(30993)   on 2011-03-28 20:25:24 (Show Source): You can put this solution on YOUR website!what is 12x^ ?? What's the exponent?
 Polynomials-and-rational-expressions/428354: how do you factor a^2-5a+6 please explain how or show how, thankyou1 solutions Answer 297763 by Alan3354(30993)   on 2011-03-28 19:45:00 (Show Source): You can put this solution on YOUR website!The form will be (a - f)*(a - g) -------------------- Look at the factors of 6 It's either 1 & 6 or 2 & 3 The signs will be the same, since it's a +6 Both will be negative, since it's -5a
 Probability-and-statistics/428232: a couple plans to have 5 children. what is the probability of having exactly two boys?1 solutions Answer 297760 by Alan3354(30993)   on 2011-03-28 19:42:27 (Show Source): You can put this solution on YOUR website!There are 32 possible combinations of 5 children, ---------- GGGGG GGGGB GGGBG GGGBB GGBGG GGBGB GGBBG GGBBB GBGGG etc --------- 8 of the combinations have exactly 2 boys 8/32 = 1/4
 Expressions-with-variables/428361: Give an equation of a line perpendicular to the line y = 4x having the same y-intercept 1 solutions Answer 297759 by Alan3354(30993)   on 2011-03-28 19:38:42 (Show Source): You can put this solution on YOUR website!The y-int is zero. The slope is the negative inverse of 4, = -1/4 --> y = -x/4
 Polynomials-and-rational-expressions/428306: how do you fiend factorization 1 solutions Answer 297736 by Alan3354(30993)   on 2011-03-28 18:22:34 (Show Source): You can put this solution on YOUR website!In most cases, the instructor finds it and asks you to do the work.
 Volume/428305: a car traveled 23 miles east and then 18 miles north. how far is the car from the starting point?1 solutions Answer 297735 by Alan3354(30993)   on 2011-03-28 18:21:36 (Show Source): You can put this solution on YOUR website!It's Pythagoras again. You take it from there.
 Radicals/428230: how do you simplify a raadical expression like the square root of 200, mandi.williford@yahoo.com thank you 1 solutions Answer 297703 by Alan3354(30993)   on 2011-03-28 16:34:47 (Show Source):
 Triangles/428179: If 3/8 of the perimeter of an equilateral triangle is 6ft, what is the length of one side? and how did you get the answer?1 solutions Answer 297688 by Alan3354(30993)   on 2011-03-28 15:26:09 (Show Source): You can put this solution on YOUR website!(3/8)*p = 6 (1/8)*p = 2 p = 16 ------------ One side = p/3 = 16/3 ft
 Parallelograms/428192: What is the distance between points A(-2,2) and B(1,6) please and thank you1 solutions Answer 297686 by Alan3354(30993)   on 2011-03-28 15:11:36 (Show Source): You can put this solution on YOUR website!It's Pythagoras again. Can you finish it?
 Expressions-with-variables/428159: Solve using the elimination method. Show all work. 4x + 8y = 16 -2x + 5y = 551 solutions Answer 297675 by Alan3354(30993)   on 2011-03-28 14:31:49 (Show Source): You can put this solution on YOUR website!4x + 8y = 16 -2x + 5y = 55 ---------- 2x + 4y = 8 eqn 1 x 1/2 -2x + 5y = 55 --------------- Add 9y = 63 y = 7 ------ x = -10
 logarithm/428156: solve for T using the rules of logarithms, round answer to three decimal places: 6^T=5^T+11 solutions Answer 297670 by Alan3354(30993)   on 2011-03-28 14:23:03 (Show Source): You can put this solution on YOUR website!If the exponent of 5 is t+1, t*log(6) = (t+1)*log(5) = tlog(5) + log(5) tlog(6) - t*log(5) = log(5) t = log(5)/(log(6) - log(5)) = log(5)/log(1.2) t =~ 8.827
 Polynomials-and-rational-expressions/428154: Divide. Can you help with this.1 solutions Answer 297666 by Alan3354(30993)   on 2011-03-28 14:11:43 (Show Source): You can put this solution on YOUR website!Divide all terms by 5 Then by x Then by y
 Polynomials-and-rational-expressions/428150: I have worked this problem at least six times on paper. This particular area is giving me a headache. Please help. Find the polynomial with the lowest degree having the following zeros -2, 2-i A)x^3+6x^2+10 B)6x^2+13x+10 C)x^3+6x^2+13x+10 D)x^3+2x+3x-10 E)None of the above1 solutions Answer 297661 by Alan3354(30993)   on 2011-03-28 14:01:37 (Show Source): You can put this solution on YOUR website!Find the polynomial with the lowest degree having the following zeros -2, 2-i -------- Complex roots always occur in pairs, so add 2+i as a zero --> (x+2)*(x-2-i)*(x-2+i) = = --> E --------------- A)x^3+6x^2+10 B)6x^2+13x+10 C)x^3+6x^2+13x+10 D)x^3+2x+3x-10 E)None of the above
 Volume/428145: how much water a pan hold in the metric unit1 solutions Answer 297658 by Alan3354(30993)   on 2011-03-28 13:42:22 (Show Source): You can put this solution on YOUR website!Small ones hold less than big ones. To be more specific, you'll have to give more info.
 logarithm/428146: I am trying to rewrite 1/(e^x + e^-x) in the form e^x/(e^2x + 1) Its for an improper integral problem. This form is in the solution manual so that it will fit easily into an arctan format. I'm not sure how to rewrite it from form 1 to form 2.1 solutions Answer 297657 by Alan3354(30993)   on 2011-03-28 13:40:31 (Show Source): You can put this solution on YOUR website!It's as you show. The NUM and DEN are multiplied by e^x
 Geometry_Word_Problems/428075: Here are the dimensions of three rectangles. Which one of them is most square? 114’ × 99’ 455’ × 494’ 284’ × 265’1 solutions Answer 297632 by Alan3354(30993)   on 2011-03-28 11:40:32 (Show Source): You can put this solution on YOUR website!Rectangles are either squares or not squares. There is no "most square." The other tutor showed which one is most nearly square.
 Percentage-and-ratio-word-problems/428113: Please help me solve this proportion. 1 solutions Answer 297631 by Alan3354(30993)   on 2011-03-28 11:35:14 (Show Source): You can put this solution on YOUR website!9/5 = 3/x Cross multiply 9x = 15 x = 5/3
 Expressions-with-variables/428063: I am supposed to solve using the substitution method. 5x-6y=-20 5x+45=y Here is what I have tried and I think it is wrong. I switched the 2nd equation so that it read y=5x+45. It was then, 5x-6y=-20 y=5x+45 Here is how I worked it out 5x-6(5x+45)=-20 5x-30x-270=-20 -35x-270+270=-20+270 -35x=250 and I divided both sides by -35 and got 7.14 but I know this is wrong and I do not know where or what I did wrong. 1 solutions Answer 297600 by Alan3354(30993)   on 2011-03-28 09:01:33 (Show Source): You can put this solution on YOUR website!I am supposed to solve using the substitution method. 5x-6y=-20 5x+45=y Here is what I have tried and I think it is wrong. I switched the 2nd equation so that it read y=5x+45. It was then, 5x-6y=-20 y=5x+45 Here is how I worked it out 5x-6(5x+45)=-20 5x-30x-270=-20 -35x-270+270=-20+270 ************** Should be -25x then x = -10 y = -5
 Triangles/427902: If the area of a right triangle is 15, what is its perimeter?1 solutions Answer 297508 by Alan3354(30993)   on 2011-03-27 20:07:32 (Show Source): You can put this solution on YOUR website!Not enough info.
 logarithm/427906: express 3logx-2logy as a single logarithm1 solutions Answer 297506 by Alan3354(30993)   on 2011-03-27 20:05:09 (Show Source): You can put this solution on YOUR website!3log(x)-2log(y) = =