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# Recent problems solved by 'Alan3354'

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 Trigonometry-basics/425048: Use an appropriate half-angle formula to find the exact value of the expression. cos(-112.5) I did the problem and got sqrt(2-sqrt(2))/(2) and its wrong. Help me solve this and find my mistake. Please and thank you!1 solutions Answer 296105 by Alan3354(30992)   on 2011-03-21 13:09:49 (Show Source): You can put this solution on YOUR website!cos(a/2) = ± sqrt( (1+cos(a))/2) cos(-225) = -sqrt(2)/2 ----------------------- cos(-112.5) = sqrt(0.5 - sqrt(2))/4) = sqrt(0.5 - sqrt(2))/2 =~ -0.38268
 Linear-equations/425005: Is (2, 0) a solution of 2x - y = 4? 1 solutions Answer 296093 by Alan3354(30992)   on 2011-03-21 11:04:50 (Show Source): You can put this solution on YOUR website!Sub 2 for x and 0 for y. Does it equal 4?
 Angles/425000: The sum of three consecutive odd integers is 132. Find the three integers.1 solutions Answer 296090 by Alan3354(30992)   on 2011-03-21 10:56:57 (Show Source): You can put this solution on YOUR website!132/3 = 44 3 integers are 42, 44 & 46. There are not 3 consecutive odd integers that add to 132. The sum of 3 consecutive odd integers will be an odd number divisible by 3.
 Numbers_Word_Problems/424972: one number exceeds another by 1, the sum of the numbers is 67, what are the numbers?1 solutions Answer 296084 by Alan3354(30992)   on 2011-03-21 09:50:27 (Show Source): You can put this solution on YOUR website!67/2 = 33.5, the center --> 33 & 34
 Inverses/424970: I am not sure if this equation was done right. Here it is 1/3+1/2 ------- 5/9-1/3 Do I add the first equation to get that answer, subtract the second equation and take both answers and Divide them? Here is what I have on my sheet: 1/3+1/2 2/6+3/6 5/6 -------= -------= ---=5/6 * 9/2 = 5/6 * 27/6 = 45/12 ? 5/9-1/3 5/9-3/9 2/9 Is this any where close to being right?1 solutions Answer 296082 by Alan3354(30992)   on 2011-03-21 09:44:48 (Show Source): You can put this solution on YOUR website!It's correct, but 45/12 = 15/4. BTW, it's not an equation, it has no equal sign. It's a simplification problem.
 Inequalities/424647: How do you solve 15h+30<10h-451 solutions Answer 295990 by Alan3354(30992)   on 2011-03-20 20:31:48 (Show Source): You can put this solution on YOUR website!15h+30<10h-45 Subtract 10h from both sides 5h+30<-45 Subtract 30 5h < -75 Divide by 5 h < -15
 Evaluation_Word_Problems/424625: Simplify expression. (2x^2)(yx^3)(2yx^3) I've got an answer of 4x^8y^2. Is this answer correct? Please show steps.1 solutions Answer 295953 by Alan3354(30992)   on 2011-03-20 17:44:55 (Show Source): You can put this solution on YOUR website!Simplify expression. (2x^2)(yx^3)(2yx^3) = =
 Quadratic_Equations/424632: any help would be appreciated thank you completing the square x squared+5x=81 solutions Answer 295950 by Alan3354(30992)   on 2011-03-20 17:42:57 (Show Source): You can put this solution on YOUR website!duplicate
 Polynomials-and-rational-expressions/424645: Hello, Here's my problem: Find the product. (4m+2n)^2 I can see the answer in my book is: 16m^2+16mn+4n^2 My dilemma is the middle term. I don't understand the process of determining the middle term. Can you help me please? Thanks, Mariah1 solutions Answer 295947 by Alan3354(30992)   on 2011-03-20 17:33:38 (Show Source): You can put this solution on YOUR website!Find the product. (4m+2n)^2 = (4m+2n)*(4m+2n) = 4m*(4m+2n) + 2n(4m+2n) = = -------------------------- a = 4m, b = 2n
 Quadratic_Equations/424630: completing the square x squared+5x=8any help would be appreciated thank you1 solutions Answer 295943 by Alan3354(30992)   on 2011-03-20 17:04:35 (Show Source): You can put this solution on YOUR website!completing the square x squared+5x = 8
 Polynomials-and-rational-expressions/424421: I need help on this one: (x)/(x+5)-(5)/(x-5)=(x^(2)+25)/(x^(2)-25) I come up with no solution, I am not sure this is right. Can anyone help me solve?1 solutions Answer 295879 by Alan3354(30992)   on 2011-03-20 09:42:11 (Show Source): You can put this solution on YOUR website!(x)/(x+5)-(5)/(x-5) = (x^2+25)/(x^2-25) Multiply thru by x^2-25 -10x-25 = 25 -10x = 50 x = -5 ---------- x=-5 makes the DENs = 0, so it's not allowed no solution
 Equations/424419: SOMEONE please help me with this problem: A formula for velocity is: v=√2as+u^2 Rearrange the above formula to make 'a' the subject. Thanks! 1 solutions Answer 295878 by Alan3354(30992)   on 2011-03-20 09:24:23 (Show Source): You can put this solution on YOUR website!What's under the radical? 2 ? 2as ? 2as + u^2 ?
 Points-lines-and-rays/424343: The diameter of a circle is 80" what is the circumference? 1 solutions Answer 295837 by Alan3354(30992)   on 2011-03-19 22:02:16 (Show Source):
 Graphs/424325: Find the standard equation of the circle through (-2,4) and (6,6)?1 solutions Answer 295836 by Alan3354(30992)   on 2011-03-19 21:31:21 (Show Source): You can put this solution on YOUR website!An infinite number of circles can pass thru 2 points.
 Graphs/424329: x + 2y = 5 and 2x + 4y = 7 are the graphs of these two equations perpendicular?1 solutions Answer 295835 by Alan3354(30992)   on 2011-03-19 21:30:16 (Show Source): You can put this solution on YOUR website!No, they're parallel. -------------- x + 2y = 5 --> 2x + 4y = 10
 Graphs/424327: find the slope-intercept equation of the line that has the given characteristics: Slope 6 and y-intercept (0, 5)1 solutions Answer 295834 by Alan3354(30992)   on 2011-03-19 21:28:59 (Show Source): You can put this solution on YOUR website!y = 6x + 5
 Equations/424331: Solve the following equation for m p=6n-5m/141 solutions Answer 295833 by Alan3354(30992)   on 2011-03-19 21:28:18 (Show Source): You can put this solution on YOUR website!p=6n-5m/14 What terms are divided by 14?
 Rectangles/424264: A square table measures 8 feet on each side . Which of the following tables has the same area? 1 solutions Answer 295820 by Alan3354(30992)   on 2011-03-19 19:19:52 (Show Source): You can put this solution on YOUR website!8*8 = 64 sq ft
 Expressions-with-variables/424110: Hi, I was wondering. How would this be solved I don't uderstand how to do this kind of problem ex: 2(x+5) + 4(x-3) = x -61 solutions Answer 295735 by Alan3354(30992)   on 2011-03-19 09:48:08 (Show Source): You can put this solution on YOUR website!2(x+5) + 4(x-3) = x -6 2x+10 + 4x-12 = x-6 6x-2 = x-6 5x-2 = -6 5x = -4 x = -4/5
 logarithm/424076: hie,pliz help me solve the folloeing simultaneous equations log(base3)x=y log(base9){2x-1}=y1 solutions Answer 295732 by Alan3354(30992)   on 2011-03-19 09:08:47 (Show Source): You can put this solution on YOUR website! --> ---------------- ----------------- x = 4x-2 x = 2/3 ---------- y =~ -0.369
 Linear-equations/423953: Do the equations x = 4y + 1 and x = 4y – 1 have the same solution? How might you explain your answer to someone who has not learned algebra? 1 solutions Answer 295664 by Alan3354(30992)   on 2011-03-18 20:52:59 (Show Source): You can put this solution on YOUR website!Each equation has an infinite number of solutions. It's not clear what you meant to ask.
 Miscellaneous_Word_Problems/423954: six plus an unknonwn number is equal to twelve decreased by the unknonwn number. what is the number?1 solutions Answer 295641 by Alan3354(30992)   on 2011-03-18 19:44:39 (Show Source): You can put this solution on YOUR website!six plus an unknonwn number is equal to twelve decreased by the unknonwn number. what is the number? -------------------- 6 + n = 12 - n 6 + 2n = 12 2n = 6 n = 3
 Square-cubic-other-roots/423989: Express in terms of i: √(-28)1 solutions Answer 295638 by Alan3354(30992)   on 2011-03-18 19:34:32 (Show Source): You can put this solution on YOUR website!sqrt(-28) = +/- i*sqrt(28) = +/- 2i*sqrt(7)
 Proportions/423966: solve using long division. then check. (-30+6y^3-28y+y^2)+(2y-5) I tried it and think I got it, at least the check turned out. just need to know if I showed my work correctly.1 solutions Answer 295637 by Alan3354(30992)   on 2011-03-18 19:32:50 (Show Source): You can put this solution on YOUR website!There's no division sign ??
 Polynomials-and-rational-expressions/423982: A launched rocket has an altitude, in meters, given by the polynomial h+vt-4.9^2, where h is the height, in meters, from which the launch occurs, at velocity v meters per second, and t is the number of seconds for which the rocket is airborne. If a rocket is launched from the top of a tower 100 meters high with an initial upward speed of 20 meters per second, what will its height be after 2 seconds. Its height will be__meters?1 solutions Answer 295636 by Alan3354(30992)   on 2011-03-18 19:30:22 (Show Source): You can put this solution on YOUR website! A launched rocket has an altitude, in meters, given by the polynomial h+vt-4.9^2, where h is the height, in meters, from which the launch occurs, at velocity v meters per second, and t is the number of seconds for which the rocket is airborne. If a rocket is launched from the top of a tower 100 meters high with an initial upward speed of 20 meters per second, what will its height be after 2 seconds. -------------- I think it's h(t) = h + vt - 4.9t^2 h(2) = 100 + 20*2 - 4.9*4 h(2) = 120.6 meters ----------------- PS This is not a rocket, rockets have thrust and don't fall ballistically. This is just a projectile that is launched and has no power of its own.
 Geometry_Word_Problems/423976: can you suck my dickkkkkk! ID LIKE YOU TO SUCK MY MOTHERFUCKING DICCKK(: Thannx giirl. <3 I love you. Call meeee, 810 235 3592. -Cierra Ilancia Da'Nai Turner, lolzxxx. I want you to suck on my motherfucking diccckkk. :DDDDDDDDDDD BUHBYYYEE. :)1 solutions Answer 295635 by Alan3354(30992)   on 2011-03-18 19:25:09 (Show Source): You can put this solution on YOUR website!Your dick is probably as small as your brain.
 logarithm/423961: WHAT IS Log4-Log10 1 solutions Answer 295623 by Alan3354(30992)   on 2011-03-18 18:22:37 (Show Source): You can put this solution on YOUR website!log(4) - log(10) = log(4/10) = log(0.4) --------------- or = log(4) - 1
 Surface-area/423969: how 2 find area of circle using 22/7 1 solutions Answer 295622 by Alan3354(30992)   on 2011-03-18 18:21:25 (Show Source):
 Equations/423973: what is an equation1 solutions Answer 295621 by Alan3354(30992)   on 2011-03-18 18:20:46 (Show Source): You can put this solution on YOUR website!duplicate
 Equations/423972: what is an equation 1 solutions Answer 295620 by Alan3354(30992)   on 2011-03-18 18:20:27 (Show Source): You can put this solution on YOUR website!It's a statement setting 2 (usually 2, sometimes more) things equal. equal, equate, equation. --------------------------- –noun 1. the act of equating or making equal; equalization: the symbolic equation of darkness with death. 2. equally balanced state; equilibrium. 3. Mathematics . an expression or a proposition, often algebraic, asserting the equality of two quantities.
 Graphs/423922: Given the linear equation y = -x – 4, find the y-coordinates of the points (-1), (2, ), and (-3, ). Please show all of your work. Plot these points and graph the linear equation1 solutions Answer 295615 by Alan3354(30992)   on 2011-03-18 17:13:04 (Show Source): You can put this solution on YOUR website!Given the linear equation y = -x – 4, find the y-coordinates of the points (-1), (2, ), and (-3, ). Please show all of your work. Plot these points and graph the linear equation ------------------- y = -x - 4 Sub the values for x: @ x = -1: y = 1 - 4 = -3 --> (-1,-3) @ x = 2: y = -2 - 4 = -6 --> (2,-6) @ x = -3: y = 3 - 4 = -1 --> (-3,-1) ----------------