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# Recent problems solved by 'Alan3354'

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 Exponential-and-logarithmic-functions/480320: what is x^2= -111 solutions Answer 328971 by Alan3354(30993)   on 2011-08-10 20:25:48 (Show Source): You can put this solution on YOUR website!It's a quadratic equation in x.
 Linear-equations/480329: x+4=y y-x=-3 determine whether the graphs of the equations are perpendicular lines1 solutions Answer 328969 by Alan3354(30993)   on 2011-08-10 20:15:51 (Show Source): You can put this solution on YOUR website!They're not, they're parallel.
 Equations/480276: Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 8x + 11y = -50 -32x – 44y = -2001 solutions Answer 328959 by Alan3354(30993)   on 2011-08-10 19:15:58 (Show Source): You can put this solution on YOUR website!The left side of the 2nd eqn is -4 times the 1st eqn. --> inconsistent, no solution. ------------ If you graph them, the lines are parallel. No intersection, no solution.
 Percentage-and-ratio-word-problems/480294: how do you calculate 6% per anum on \$1800.00 for 1 year1 solutions Answer 328957 by Alan3354(30993)   on 2011-08-10 19:12:43 (Show Source): You can put this solution on YOUR website!1800*0.06 = \$108 That's how I'd do it.
 Permutations/480306: A typical Social Security number is 555-47-5593. How many Social Security numbers are possible if the first two digits cannot be 0? 1 solutions Answer 328954 by Alan3354(30993)   on 2011-08-10 19:11:14 (Show Source): You can put this solution on YOUR website!It's 9 digits ------------- For the 1st 2, it's 1 of 9, the other 7 are 1 of 10 --> 9*9*10E7 = = 810,000,000
 Linear-equations/480216: Solve the following linear equation X/2=-51 solutions Answer 328935 by Alan3354(30993)   on 2011-08-10 17:22:07 (Show Source): You can put this solution on YOUR website!Multiply by 2
 Graphs/480266: What does "y > 4x – 2; y < = –3x – 1" look like on a graph ? Or even how to graph it .1 solutions Answer 328934 by Alan3354(30993)   on 2011-08-10 17:20:20 (Show Source): You can put this solution on YOUR website!dl the FREE graph software at http://www.padowan.dk and find out
 Linear-equations/480268: find the slope and the y-intercept of the line y=2x+51 solutions Answer 328933 by Alan3354(30993)   on 2011-08-10 17:19:35 (Show Source): You can put this solution on YOUR website!x = 0 gives the y-int y = 0 gives the x-int ---------
 Triangles/480261: The legs of a right triangle are 4 units and 7 units long. To the nearest whole number, what is the length of the hypotenuse?1 solutions Answer 328930 by Alan3354(30993)   on 2011-08-10 17:06:02 (Show Source):
 Rectangles/480227: Please help me solve this: find the length of a rectangle with area 56m^2 and width 8m1 solutions Answer 328927 by Alan3354(30993)   on 2011-08-10 16:55:00 (Show Source): You can put this solution on YOUR website!What sort of help do you need?
 Length-and-distance/480229: Add 86°14’23”+ 16°53’10” Thank you1 solutions Answer 328926 by Alan3354(30993)   on 2011-08-10 16:54:28 (Show Source): You can put this solution on YOUR website!Add the degrees Add the minutes Add the seconds --------------- If the seconds or minutes >60, adjust it.
 Equations/480236: I need help solving this please. Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 7x - 6y = -88.5 -28x + 24y = -3541 solutions Answer 328925 by Alan3354(30993)   on 2011-08-10 16:52:47 (Show Source): You can put this solution on YOUR website!The 2nd equation is -4 times the 1st. --> dependent --> no unique solution. an infinite number of solutions fit.
 Complex_Numbers/480237: I need help solving this. x^2 + 18x-4=0 What does x equal?1 solutions Answer 328924 by Alan3354(30993)   on 2011-08-10 16:50:46 (Show Source): You can put this solution on YOUR website!What sort of help?
 test/480255: 3x-2y=6 6x-4y=141 solutions Answer 328923 by Alan3354(30993)   on 2011-08-10 16:49:51 (Show Source): You can put this solution on YOUR website!duplicate
 test/480254: 3x-2y=12 6x-4y=141 solutions Answer 328922 by Alan3354(30993)   on 2011-08-10 16:49:11 (Show Source): You can put this solution on YOUR website!3x-2y=12 6x-4y=14 --> 3x-2y=7 -------------------- 3x-2y=12 3x-2y=7 ----------- 3x-2y can't be both 12 & 7. --> inconsistent. If you graph them, the lines are parallel. No intersection, no solution.
 percentage/480231: Why is pie chart called a pie chart?1 solutions Answer 328921 by Alan3354(30993)   on 2011-08-10 16:47:15 (Show Source): You can put this solution on YOUR website!It's round, and separated into slices. ---------- Or, "pie are round, cornbread are square" ?? But that's for area, nm.
 Travel_Word_Problems/480071: An athlete decides to run the same distance in 1/4th less time that she usually took. By how much percent will she have to increase her average speed?1 solutions Answer 328864 by Alan3354(30993)   on 2011-08-10 11:34:38 (Show Source): You can put this solution on YOUR website!d = r1*t For 3/4 the time: d = r2*(3t/4) r1*t = r2*3t/4 r1 = r2*3/4 r2 = 4*r1/3 4/3 as fast, a 33 1/3% increase
 Polynomials-and-rational-expressions/480079: Factor out the greatest common factor. 16y^5-24y^4-40y^21 solutions Answer 328863 by Alan3354(30993)   on 2011-08-10 11:21:53 (Show Source): You can put this solution on YOUR website!Factor out the greatest common factor. 16y^5-24y^4-40y^2 ---------------------- Common with what? There's only one expression shown. It can be factored:
 Volume/480111: I have a cylinder with a 2.5 cm radius and a 6cm height . What is the total area of this cylinder?1 solutions Answer 328862 by Alan3354(30993)   on 2011-08-10 11:20:26 (Show Source): You can put this solution on YOUR website!I have a cylinder with a 2.5 cm radius and a 6cm height . What is the total area of this cylinder? ------------ Lateral area (the curved part) = 2*pi*r*h Top and bottom area = each
 Graphs/480085: i need help with graphing 6x-2y=01 solutions Answer 328861 by Alan3354(30993)   on 2011-08-10 11:17:50 (Show Source): You can put this solution on YOUR website!i need help with graphing 6x-2y=0 --------- y = 3x It's a straight line, so you need 2 points Pick 2 for x and find y. Plot the 2 points. Draw a line thru them.
 Systems-of-equations/480091: Find the slope-intercept form, standard form and point slope form of the equation of the line described A line with y-intercept of (0, -3) and x-intercept of (-5, 0)1 solutions Answer 328855 by Alan3354(30993)   on 2011-08-10 10:28:36 (Show Source): You can put this solution on YOUR website!Find the slope-intercept form, standard form and point slope form of the equation of the line described A line with y-intercept of (0, -3) and x-intercept of (-5, 0) ------------------ If the y-int is (0,A) and the x-int is (B,0), the eqn is Ax + By + AB = 0 ------------ -3x - 5y + 15 = 0 3x + 5y = 15 standard form ---------- y = (-3/5)x + 3 slope-intercept form -------------------------------- You can do it like this, too Find the slope, m = diffy/diffx = 3/-5 = -3/5 Use y = mx + b and either point to find b (we'll pretend we don't know it) -3 = (-3/5)*0 + b b = -3 --> y = (-3/5)x - 3 slope-int form 3x + 5y = 15
 Graphs/480074: find the slope if it exist y=-2.79x1 solutions Answer 328845 by Alan3354(30993)   on 2011-08-10 09:41:16 (Show Source): You can put this solution on YOUR website!m = -2.79
 Linear_Equations_And_Systems_Word_Problems/480060: Find the slope, if it exist, of the line containing the points (-1,1/2) and (-2,1/2).1 solutions Answer 328843 by Alan3354(30993)   on 2011-08-10 09:15:49 (Show Source): You can put this solution on YOUR website!There's on change in y, so slope = 0.
 Evaluation_Word_Problems/480031: The circle passes through the points (0,3),(2,4),(1,0). Find the equation of the circle 1 solutions Answer 328842 by Alan3354(30993)   on 2011-08-10 09:13:33 (Show Source): You can put this solution on YOUR website!One way to do this: Label the points, say A, B and C A(0,3) B(2,4) C(1,0) ----------- Find the perpendicular bisectors of AB and BC (any 2) Solve those 2 equations, the solution is the center of the circle, point P(x,y) ---------- Find the distance from P to A, B or C, that's the radius. --------- Then Px and Py are x & y of point P. ------------------- I prefer to use determinants, and I have an Excel sheet thst does them.
 Rectangles/480018: hi um i just want to no what is the area of a square which has a perimeter of 92 meters if you no it please may i have the answer thanx alot.1 solutions Answer 328839 by Alan3354(30993)   on 2011-08-10 08:57:29 (Show Source): You can put this solution on YOUR website!All 4 sides are equal length s = 92/4 -----------
 test/479922: A line passes through (1,-5) and (-3,7) write an equation for the line in point - slope form 1 solutions Answer 328808 by Alan3354(30993)   on 2011-08-09 22:43:19 (Show Source): You can put this solution on YOUR website!A line passes through (1,-5) and (-3,7) write an equation for the line in point - slope form ------------- m = diffy/diffx = 12/-4 m = -3 --------- y = mx + b Use either point -5 = -3 + b b = -2 --------- y = -3x - 2
 test/479959: The product of my 3 digit is 30. When you add my 1 digit and my 10 digit together the sum is my 100th digit. And my 1 digit is 3.1 solutions Answer 328806 by Alan3354(30993)   on 2011-08-09 22:39:05 (Show Source): You can put this solution on YOUR website!523
 Polynomials-and-rational-expressions/479942: Can you help me subtract 2x + 2w = 24 from -9 x + -2 w = -80 please thank you. 1 solutions Answer 328805 by Alan3354(30993)   on 2011-08-09 22:34:47 (Show Source): You can put this solution on YOUR website!-11x - 4w = -104
 Probability-and-statistics/479918: How many ways can you add three different even numbers to get a sum of 20? 1 solutions Answer 328804 by Alan3354(30993)   on 2011-08-09 22:33:38 (Show Source): You can put this solution on YOUR website!An infinite number. 4, 6 & 10 2, 6 & 12 0, 6 & 14 -10, 8 & 12 -20, 0, 40 -300, 12, 308 etc
 Rectangles/479967: what is the width of a rectangle with a perimeter of 70 feet if its lenght is 1 foot? 2 feet? l feet?1 solutions Answer 328803 by Alan3354(30993)   on 2011-08-09 22:29:20 (Show Source): You can put this solution on YOUR website!what is the width of a rectangle with a perimeter of 70 feet if its lenght is 1 foot? 34 feet --------- 2 feet? 33 feet ------- l feet? 35-L
 Inequalities/479903: how do you solve -6x=24?1 solutions Answer 328802 by Alan3354(30993)   on 2011-08-09 22:26:57 (Show Source): You can put this solution on YOUR website!Divide by -6