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# Recent problems solved by 'elima'

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 Circles/132722: I am a little confused about diameters. I would be grateful for any assistance available. The problem states: A circular path around a lake has a diameter of 1,500 feet (ft). Pranotti jogs around the path 5 times for her morning run. How far does she run? Use 3.14 for pie and round your answer to the nearest foot.1 solutions Answer 97023 by elima(1433)   on 2008-03-19 13:21:08 (Show Source): You can put this solution on YOUR website!The diameter of a circle is the length across the center.The formula for circumference (which is the length around the circle); c=d c=15000 c=4710 So the distance around the pond is, 4710, since he went around it 5 times we multiply; 4710(5)=23550ft :)
 expressions/132720: x2-4(x-y) given x=8 y=3 A)60 B)44 C)84 D)46 so 63-4(8-3) didn't match any of these answers. Did I do this correctly? Thank you so much.1 solutions Answer 97014 by elima(1433)   on 2008-03-19 12:39:39 (Show Source): You can put this solution on YOUR website!You made one little mistake; = 64 so it would be; 64-4(8-3)=64-32+12 32+12=44 so the answer is B :)
 Numbers_Word_Problems/132719: The difference between six times a number and 9 is equal to five times the sum of the number and 2.find the number1 solutions Answer 97010 by elima(1433)   on 2008-03-19 12:30:17 (Show Source): You can put this solution on YOUR website!The difference between six times a number and 9 is equal to five times the sum of the number and 2.find the number ========================== 6x-9 = 5(x+2) 6x-9 = 5x+10 6x-5x=10+9 x=19 :)
 Percentage-and-ratio-word-problems/132718: 2.5% equals what decimal number, & fraction?1 solutions Answer 97008 by elima(1433)   on 2008-03-19 12:18:47 (Show Source): You can put this solution on YOUR website!2.5%= = 2.5% = .025 :)
 Expressions-with-variables/132549: Solve for W V=LWH Solve for Z w/x=y/z Help!1 solutions Answer 96894 by elima(1433)   on 2008-03-18 13:39:44 (Show Source): You can put this solution on YOUR website!Solve for W V=LWH divide each side by l and h so we get the w by itself; Solve for Z multiple each side by x and z; w/x=y/z zw = yx now divide each side by w; :)
 Linear-equations/132545: This question is from textbook algebra math 009 Sorry, I thnk I confussed thing when I plac an = at the end. The equation is: 3(4x+2)= 2(1x+5)+8, SOORY! But I'm going to study that one as well, I see it is an equation also that I just might have, thank you. But, don't stop.1 solutions Answer 96892 by elima(1433)   on 2008-03-18 13:35:27 (Show Source): You can put this solution on YOUR website!3(4x+2)= 2(1x+5)+8, distribute the 3 and the 2; 12x+6=2x+10+8 subtract 6 and 2x from each side; 12x-2x=10+8-6 10x=12 divide each side by 10; x=12/10 :)
 Equations/132544: This question is from textbook Intermediate Algebra 10y-5=4y-251 solutions Answer 96889 by elima(1433)   on 2008-03-18 13:29:41 (Show Source): You can put this solution on YOUR website!10y-5=4y-25 Subtract 4y and add 5 to each side; 10y-4y=-25+5 6y=-20 divide each side by 6; y=-20/6= -3 1/3 :)
 Quadratic_Equations/132529: Determine whether the following equations have a solution or not? Justify your answer. p2 - 4p + 4 = 0 1 solutions Answer 96887 by elima(1433)   on 2008-03-18 13:18:20 (Show Source): You can put this solution on YOUR website!p2 - 4p + 4 = 0 (p-2)(p-2)=0 p-2=0 p=2 Yes it has a solution; 4-8+4 = 0 :)
 Polynomials-and-rational-expressions/132524: This question is from textbook Mc Dougal Littrll Algebera 1 6x+5x+1=01 solutions Answer 96886 by elima(1433)   on 2008-03-18 13:13:20 (Show Source): You can put this solution on YOUR website!6x+5x+1=0 collect like terms; 11x+1=0 subtract 1 from both sides; 11x=-1 divide each side by 11; x=-1/11 :)
 Numeric_Fractions/132523: I need help with this problem and would appreciate if anyone could help me solve it. Thank you. n + 5 3/10=8 1/10, find the value of n.1 solutions Answer 96885 by elima(1433)   on 2008-03-18 13:10:46 (Show Source): You can put this solution on YOUR website!n + 5 3/10=8 1/10 Subtract 5 3/10 from each side; n= 8 1/10 - 5 3/10 n= 2 4/5 :)
 Pythagorean-theorem/132521: If the area of a square is 169 square centimeters, what is the length of the diagnal? 1 solutions Answer 96883 by elima(1433)   on 2008-03-18 13:05:41 (Show Source): You can put this solution on YOUR website!If the area of a square is 169 square centimeters, what is the length of the diagnal? formula for area of square; take the square root of each side; 13=s so the sides of the square are 13, now we can use Pythagoreans thereom to find the diagonal; take square root of each side; 26 = c so diagonal = 26 :)
 Equations/132492: 2x=3x+21 solutions Answer 96882 by elima(1433)   on 2008-03-18 12:50:44 (Show Source): You can put this solution on YOUR website!2x=3x+2 subtract 2 from both sides; 2x-2=3x subtract 2x from both sides; -2=3x-2x -2=x :)
 Quadratic_Equations/131608: it says to use a table of values to graph the function y=x^2-31 solutions Answer 96165 by elima(1433)   on 2008-03-12 13:24:46 (Show Source): You can put this solution on YOUR website!You choose a value for one of the variables and solve the equation to find the other. y=x^2-3 x | y ------ 0 | 1 | 2 | Now you solve the equation to find what y equals; y=0-3 y=-3 x | y ------- 0 | -3 y=1-3 y=-2 x |y ----- 0 |-3 1 |-2 Now you do the last :)
 Finance/131589: 2x+y=4 x-y=21 solutions Answer 96164 by elima(1433)   on 2008-03-12 13:18:13 (Show Source): You can put this solution on YOUR website!2x+y=4 x-y=2 ============ y=2+x 2x+2+x=4 3x=2 y=4- y=-8/3 :)
 Radicals/131577: This question is from textbook algebra 1 (califonia edition) ummm im trying to solve these for homework but even if i read hoe to do the equations i cant solve it umm i dont know if this is a lot of problems but if it is can you answer two but work it out so i can figure it out?????1 solutions Answer 96162 by elima(1433)   on 2008-03-12 13:06:56 (Show Source): You can put this solution on YOUR website!We do not all have this book o you should post the problem. If there are a lot, then post a couple and we can show how it is worked out. :)
 Linear-equations/131576: Find the y intercept of the line 6x-4y=-24 Choices are: 6 -4 -6 41 solutions Answer 96161 by elima(1433)   on 2008-03-12 13:04:01 (Show Source): You can put this solution on YOUR website!Find the y intercept of the line 6x-4y=-24 Choices are: 6 -4 -6 4 -------------------- First put this in slope-intercept form; 6x-4y=-24 -4y=-24-6x y=6+x y=x+6 your y intercept = 6 :)
 Equations/131571: Please help me solve this equation. 6a^2-4=5a1 solutions Answer 96159 by elima(1433)   on 2008-03-12 12:50:54 (Show Source): You can put this solution on YOUR website!I assume you need it factored? (2a+1)(3a-4) Hope I'm not to late :)
 decimal-numbers/123546: 34,0001 solutions Answer 90669 by elima(1433)   on 2008-01-30 09:23:44 (Show Source): You can put this solution on YOUR website!I'm not sure what you want to do, you need to post some instructions. :)
 Geometry_Word_Problems/123553: This question is from textbook prentice hall mathematics The perimeter of a rectangle is 114 ft.Its length is 3 more than 2x its width.Find the dimensions of the rectangle.1 solutions Answer 90665 by elima(1433)   on 2008-01-30 08:52:56 (Show Source): You can put this solution on YOUR website!The perimeter of a rectangle is 114 ft.Its length is 3 more than 2x its width.Find the dimensions of the rectangle. perimeter=2L+2w L=2w+3 114=2(2w+3)+2w 114=4w+6+2w Subtract 6 from both sides and collect like terms; 108=6w divide each side by six: 18=w L=2(18)+3 L=39 :)
 Geometry_Word_Problems/117652: The length of a rectangular playing field is 5ft less than twice its width.If the perimeter of the playing field is 230ft find the length and width of the field.1 solutions Answer 85892 by elima(1433)   on 2007-12-21 13:49:20 (Show Source): You can put this solution on YOUR website!P=2W+2L L=2w-5 230=2w+2(2w-5) 230=2w+4w-10 230=6w-10 240=6w 40=width Length=2(40)-5 L=80-5 L=75 :)
 Systems-of-equations/115307: This question is from textbook Beginning Algebra Multiply. (x- 1/3)(x+ 1/3) x minus one-third multiplied by x plus one-third I am not sure how to begin 1 solutions Answer 83902 by elima(1433)   on 2007-12-07 15:50:36 (Show Source): You can put this solution on YOUR website!You use the foil method; f=first o=outside i=inside l=last (x- 1/3)(x+ 1/3) (x)(x)+(x)(1/3)-(1/3)(x)-(1/3)(1/3) :)
 Graphs/115290: Please help. Solve the system by graphing. x - 2y = 8 x + y = -1 Thanks JMS1 solutions Answer 83901 by elima(1433)   on 2007-12-07 15:45:43 (Show Source): You can put this solution on YOUR website!Solve the system by graphing. x - 2y = 8 x + y = -1 ========================== first put them in slope intercept form; x-2y=8 -2y=-x+8 y=1/2x+8 ----------- x+y=-1 y=-x-1 =========== now we graph :)
 Geometry_proofs/115274: I do not understand how inscribed angles in a circle works. My teacher asks me questions like to find angles of the stuff in a circle, then i get confused. she says that some are congruent and such, it is difficult for me. We use conjectures from the book Discovering Geometry, An inductive approach, and we are in the circle section. We are supposed to learn by our selfs using these conjecture. Please help1 solutions Answer 83899 by elima(1433)   on 2007-12-07 15:34:16 (Show Source): You can put this solution on YOUR website!I am not sure what you are specifically asking. I'd like to help, maybe you could post a problem and we can try and answer it by explaining the steps. :)
 Inequalities/115219: Trying to solve the inequality -6 less than or equal to 1/4(3-x)less than or equal to 12. Although I know the correct answer I need to see the steps to solve because my answer come out wrong. thanks for the help1 solutions Answer 83898 by elima(1433)   on 2007-12-07 15:18:10 (Show Source): You can put this solution on YOUR website!-6 less than or equal to 1/4(3-x)less than or equal to 12. =================================================================\\ :)
 Equations/115170: Allen bought 20 stamps at the post in 37 cents and 20 cents denominations. If the total cost of the stamps was \$7.06, how many 37 cents did Allen buy?1 solutions Answer 83896 by elima(1433)   on 2007-12-07 15:03:24 (Show Source): You can put this solution on YOUR website!Allen bought 20 stamps at the post in 37 cents and 20 cents denominations. If the total cost of the stamps was \$7.06, how many 37 cents did Allen buy? ========================================================================== x+y=20 .37x+.20y=7.06 ------------------- y=20-x .37x+.20(20-x)=7.06 .37x+4-.20x=7.06 .37x-.2x=7.06-4 .17x=3.06 x=18 18+y=20 y=20-18 y=2 Allen bought 18 37 cent stamps :)
 Equations/115168: Find the mean and the median. -2,-7/4,3/4,4,91 solutions Answer 83889 by elima(1433)   on 2007-12-07 14:26:53 (Show Source): You can put this solution on YOUR website! median= number that falls exactly in the middle: mean = :)
 Equations/114983: x=3y+7 x+y=-5 Could someone show me step by step. I am not clear on how to do this yet.1 solutions Answer 83674 by elima(1433)   on 2007-12-06 11:46:07 (Show Source): You can put this solution on YOUR website!Since you do not give any directions of how the teacher wants it solved, I will go ahead and solve it by substitution; x=3y+7 x+y=-5 ============ Since we already have one of the equations solved for x, lets substitute x in the other equation with that; (3y+7)+y=-5 4y+7=-5 4y=-12 y=-3 ------------------- now we have what y =, so we can use that in either equation and solve for x; x=3(-3)+7 x=-9+7 x=-2 ------------------- Let me know if you need it solved another way :)
 Proportions/114693: 2h-6=2 _____ _ 6 31 solutions Answer 83501 by elima(1433)   on 2007-12-05 12:48:01 (Show Source): You can put this solution on YOUR website! (3)(2h-6)=(6)(2) 6h-18=12 6h=30 h=5 :)
 Inequalities/114694: The solution of the inequality 2x^2-3x-2<0 is1 solutions Answer 83500 by elima(1433)   on 2007-12-05 12:43:29 (Show Source): You can put this solution on YOUR website! :)
 Equations/113561: Order the ratios from least to greatest. 1. 9/4, 5 to 2, 13:6 , 10/3 ,20 : 7 Any help with this equation would be Greatly appreciated.1 solutions Answer 82636 by elima(1433)   on 2007-11-30 18:38:42 (Show Source): You can put this solution on YOUR website! 9/4, 5 to 2, 13:6 , 10/3 ,20 : 7 ================================== You can right all of them as fractions; They are all improper fractions; 2, 2, 2,3,2; Now lets order them and put them back into ratios; 2,2,2,2,3 ,,,, :)
 Linear_Algebra/113541: Please help. Please understand that I am not sure what topic to pick for this question but i really need help, please. Solve the following system of linear inequality by graphing 3x - y ≤ 6 x ≥ 1 y ≤ 3 Thanks JMS1 solutions Answer 82634 by elima(1433)   on 2007-11-30 18:16:00 (Show Source): You can put this solution on YOUR website!3x - y ≤ 6 x ≥ 1 y ≤ 3 ==================== First put the first equation in slope-intercept form; 3x - y ≤ 6 I am unable to graph a vertical line, so I've done two, y≥3x-6 and y ≤3. The third line x ≥1, will e the vertical line running thru the 1 one the x-axis. All lines are solid and you shade the area x ≥ 1 to the right of the line, y ≤ 3 the area below the line and y ≥3x-6 the area to the left and up. I hope you understand all this. :)