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 Polynomials-and-rational-expressions/633139: show me the work and answer to (4pq)(-p2q3)1 solutions Answer 398679 by ewatrrr(10682)   on 2012-07-30 10:51:10 (Show Source): You can put this solution on YOUR website! ``` Hi, | Note: ```
 Quadratic_Equations/633140: If X= 6+8+12 Y= 9+13+7 So what is the value of X square Y square. 1 solutions Answer 398675 by ewatrrr(10682)   on 2012-07-30 10:48:06 (Show Source): You can put this solution on YOUR website! ``` Hi, RE TY: Perhaps did not understand Your question: X^2 = 676 and Y^2 = 841, are You wanting the product ? If X= 6+8+12 = 26 Y= 9+13+7 = 29 Then X^2 = Y^2 = ```
 Linear_Equations_And_Systems_Word_Problems/633138: If 3 chairs and 1 table cost rs.900 and 5 chairs and 3 table cost rs.2100, then the cost of 4 chairs and 1 table is?1 solutions Answer 398674 by ewatrrr(10682)   on 2012-07-30 10:44:37 (Show Source): You can put this solution on YOUR website! ``` Hi, 3 chairs and 1 table cost rs.900 and 5 chairs and 3 table cost rs.2100 Let x and y represent the cost of a chair and a table respectively 3x + y = 900 5x + 3y = 2100 |Multiplying the 1st Eq by 3 and subtracting from 2nd EQ -4x = -600 x = 150, chair cost. Table Cost is rs. 450 and...cost of 4 chairs and 1 table is? = rs. 1050 ```
 test/633014: Write the equation of a parabola with vertex (1,-9) and directrix y=-9-71 solutions Answer 398665 by ewatrrr(10682)   on 2012-07-30 08:06:30 (Show Source): You can put this solution on YOUR website! ``` Hi, parabola with vertex (1,-9) and directrix y = -9-7 Note: The standard form is , where the focus is (h,k + p) and Directrix is y = (k-p) p = 7, 4p = 28 , standard form is , Vertex form: y = 1/28(x-1)^2 - 9 the vertex form of a Parabola opening up(a>0) or down(a<0), where(h,k) is the vertex and x = h is the Line of Symmetry ```
 Matrices-and-determiminant/632917: Solve the following system of equations by using the inverse of the coefficent Matrix (AX=B) x+3y=-9 5x+8y=-31 i also need the ordered pair solution1 solutions Answer 398549 by ewatrrr(10682)   on 2012-07-29 15:15:09 (Show Source): You can put this solution on YOUR website! ``` Hi, Note: Post each question separately, not necessary to use pictures, just list Eqs with the following instructions: Solve the system of equations by using the inverse of the coefficient matrix. x+3y = -9 5x+8y = -31 = -7 Note: How the above numbers flipped and the 2 minuses = (1/-7) and... Ordered pair (-3,-2) the solution for this system of equations Checking our answer using the Elimination Method: x+3y= -9 5x+8y= -31 |multiplying 1st EQ by 5 and Subtracting from the 2nd EQ -7y = 14 y = -2 and x = -3 as (x,y) Ordered pair (-3,-2) the solution for this system of equations ```
 Rational-functions/632913: solve rational inequality. write the solution set in interval notation. (x-3)(x+7)/x-4<=0 1 solutions Answer 398545 by ewatrrr(10682)   on 2012-07-29 14:51:31 (Show Source): You can put this solution on YOUR website! ``` Hi, <=0}}} { x | x ≤ -8 or 3 ≤ x < 4}}} Note graph of ```
 Numeric_Fractions/632908: what fraction of an hour is 35 minutes?1 solutions Answer 398544 by ewatrrr(10682)   on 2012-07-29 14:39:22 (Show Source): You can put this solution on YOUR website! ``` Hi, what fraction of an hour is 35 minutes? ```
 Money_Word_Problems/632909: what is a better investment: 1000.00 at 3 percent for 20 years or \$500.00 at 7 percent for 20 years?1 solutions Answer 398543 by ewatrrr(10682)   on 2012-07-29 14:36:45 (Show Source): You can put this solution on YOUR website! ``` Hi, 1000(1.03)^20 = \$1806.11 500(1.07)^20 = \$1934.84 ```
 Permutations/632886: In how many ways can 3 boys and 5 girls be arranged in a row so that all the 3 boys are together1 solutions Answer 398540 by ewatrrr(10682)   on 2012-07-29 14:27:10 (Show Source): You can put this solution on YOUR website! ``` Hi, In how many ways can 3 boys and 5 girls be arranged in a row so that all the 3 boys are together I. letting the 3 boys be considered 1 unit II. and taking into consideration: they, themselves can be arranged 6 different ways ways ```
 t e s t/632892: Solve the following system of equations by using the inverse of the coefficent i need the answers for these 3 problems in the screenshot here and i also need the complete equation soultion in ordered pair format please that will be the 2nd part Question1: http://tinypic.com/view.php?pic=21ams69&s=6 Question2: http://tinypic.com/view.php?pic=242wu55&s=6 Question3: http://tinypic.com/view.php?pic=2gxdyx4&s=6 and last but not least the last part of these questions is i need to find the ordered pair of each please here is an example of the next step the problem that is on the left of the screen is what it looks like http://oi47.tinypic.com/2cpx6l0.jpg1 solutions Answer 398539 by ewatrrr(10682)   on 2012-07-29 14:16:29 (Show Source): You can put this solution on YOUR website! ``` Hi, Note: Post each question separately, not necessary to use pictures, just list Eqs with the following instructions: Solve the system of equations by using the inverse of the coefficient matrix. x+2y = -12 2x+2y = -16 = -2 = (1/-2) and... Ordered pair (-4,-4) the solution for this system of equations Checking our answer using the Elimination Method: x+2y = -12 2x+2y = -16 |Subtracting 1st EQ from the 2nd x = -4 and y = -4 as (x,y) Ordered pair (-4,-4) the solution for this system of equations ```
 Probability-and-statistics/632884: Hi, I have no idea how to solve this problem. In fact, I'm completely confused...can someone help me out? Thank you very much!! Consider the probability distribution shown below and answer the following questions. Show calculations for each computation. x -4 -3 -2 -1 0 1 2 3 4 P(x) 0.02 0.07 .10 .15 .3 .18 .10 .06 .02 Answer Calculations Calculate μ Calculate σ^2 and σ 1 solutions Answer 398532 by ewatrrr(10682)   on 2012-07-29 12:53:22 (Show Source): You can put this solution on YOUR website! ``` Hi, Previously Posted Calculate the Expected Value(Sum of PX) = μ = 0 Then Calculate the Variance(Sum of P[X-μ]^2) = 2.94 σ = X P PX P[X-μ]^2 -4 0.02 -0.08 0.32 Note: -3 0.07 -0.21 0.63 -2 0.1 -0.2 0.4 -1 0.15 -0.15 0.15 0 0.3 0 0 1 0.18 0.18 0.18 2 0.1 0.2 0.4 3 0.06 0.18 0.54 4 0.02 0.08 0.32 Sum 0 2.94 ```
 Probability-and-statistics/632891: Hi! Can someone please help me with this problem? I have no idea how to do this and I am completely confused. Thank you very much for your help! Consider the probability distribution shown below and answer the following questions. Show calculations for each computation. x -4 -3 -2 -1 0 1 2 3 4 P(x) 0.02 0.07 .10 .15 .3 .18 .10 .06 .02 Calculate μ Calculate σ^2 and σ 1 solutions Answer 398526 by ewatrrr(10682)   on 2012-07-29 12:38:42 (Show Source): You can put this solution on YOUR website! ``` Hi, Calculate the Expected Value(Sum of PX) = μ = 0 Then Calculate the Variance(Sum of P[X-μ]^2) = 2.94 SD = X P PX P[X-μ]^2 -4 0.02 -0.08 0.32 -3 0.07 -0.21 0.63 -2 0.1 -0.2 0.4 -1 0.15 -0.15 0.15 0 0.3 0 0 1 0.18 0.18 0.18 2 0.1 0.2 0.4 3 0.06 0.18 0.54 4 0.02 0.08 0.32 Sum 0 2.94 ```
 Probability-and-statistics/632879: Billie wishes to test the hypothesis that overweight individuals tend to eat faster than normal-weight individuals. To test this hypothesis, she has two assistants sit in a McDonald’s restaurant and identify individuals who order the Big Mac special for lunch. The Big Mackers as they become known are then classified by the assistants as overweight, normal weight, or neither overweight nor normal weight. The assistants identify 10 overweight and 10 normal weight Big Mackers. The assistants record the amount of time it takes them to eight the Big Mac special. 1.0 585.0 1.0 540.0 1.0 660.0 1.0 571.0 1.0 584.0 1.0 653.0 1.0 574.0 1.0 569.0 1.0 619.0 1.0 535.0 2.0 697.0 2.0 782.0 2.0 587.0 2.0 675.0 2.0 635.0 2.0 672.0 2.0 606.0 2.0 789.0 2.0 806.0 2.0 600.0 a) Compute an independent-samples t-test on these data. Report the t-value and the p values. Where the results significant? (Do the same thing you did for the t-test above, only this type when you go to compare means, click on independent samples t-test. When you enter group variable into grouping variable area, it will ask you to define the variables. Click define groups and place the number 1 into 1 and the number 2 into 2). b) What is the difference between the mean of the two groups? What is the difference is standard deviation? c) What is the null and alternative hypothesis? Do the data results lead you to reject or fail to reject the null hypothesis? d) What do the results tell you? 1 solutions Answer 398521 by ewatrrr(10682)   on 2012-07-29 11:44:49 (Show Source): You can put this solution on YOUR website! ``` Hi, : : t-Test: Two-Sample Assuming Unequal Variances 1 2 Mean 589 684.9 Variance 1816 6760.988889 SD 42.61455151 82.22523268 Observations 10 10 Hypothesized Mean Difference 0 df 14 t Stat -3.274546662 p = .0005 P(T<=t) one-tail 0.002767826 t Critical one-tail 1.76130925 P(T<=t) two-tail 0.005535651 t Critical two-tail 2.144788596 p= .016 .0005 < .016 , reject null hypothesis Group 1 eats faster than group 2 ```
 Expressions-with-variables/632866: Solve the following system algebraically: What I have tried: -> ; -> -> ; -> -> i multiplied every thing by 2 and got -> -> i multiplied every thing by 5 and got -> -> -> -> i plugged this number into the third top equation and got x=150, and plugged z and x into the second equation and got y=18. But when i plug these numbers into the first equation, the answer is wrong. I cannot figure out what I am doing wrong?1 solutions Answer 398520 by ewatrrr(10682)   on 2012-07-29 11:12:39 (Show Source): You can put this solution on YOUR website! ``` Hi, Note: general Procedure is to first the eliminate one of the variables using a pair of EQs |Multiplying 2nd Eq by 3 and adding to the first | Substituting for y and z x = -.5915 y = z = ```
 Linear-equations/632662: Find the slope and y intercept of the line in the given equation y= 2/3x-8 1 solutions Answer 398435 by ewatrrr(10682)   on 2012-07-28 16:36:06 (Show Source): You can put this solution on YOUR website! ``` Hi Find the slope and y intercept of the line in the given equation y= 2/3x-8 y = mx + b m = and y-intercept is - 8 ```
 �t�e�s�t/632693: The length of a computer case times its width is 1 solutions Answer 398434 by ewatrrr(10682)   on 2012-07-28 16:32:57 (Show Source): You can put this solution on YOUR website! ``` Hi, The length of a computer case times its width is ```
 Numbers_Word_Problems/632638: the smaller of two number is 9 less than the larger, and their sum is 38. Find the numbers 1 solutions Answer 398433 by ewatrrr(10682)   on 2012-07-28 16:29:46 (Show Source): You can put this solution on YOUR website! ``` Hi, , the smaller of two number is 9 less than the larger Question states*** y + x = 38 || y = x-9 (x-9) + x = 38 2x - 9 = 38 2x = 47 x = 47/2 0r and y = ( 9 less) and... + = 38 ```
 Numeric_Fractions/632711: Multipy Give you answer as a whole or mixed number 195*44/65*4/91 solutions Answer 398431 by ewatrrr(10682)   on 2012-07-28 16:17:31 (Show Source): You can put this solution on YOUR website! ``` Hi, ```
 Quadratic-relations-and-conic-sections/632706: Find the slopes of the asymptotes of the hyperbola with the equation 36 = 9x^2 – 4y^21 solutions Answer 398429 by ewatrrr(10682)   on 2012-07-28 16:09:50 (Show Source): You can put this solution on YOUR website! ``` Hi, 36 = 9x^2 – 4y^2 y = ± 3/2x Standard Form of an Equation of an Hyperbola opening right and left is: with C(h,k) and vertices 'a' units right and left of center, & Asymptotes Lines passing thru C(h,k), with slopes m = ± b/a ```
 Travel_Word_Problems/632681: I ride a bicycle 6.2 miles each morning. It takes me 40 minutes to travel this distance. What is my rate of travel?1 solutions Answer 398411 by ewatrrr(10682)   on 2012-07-28 13:50:50 (Show Source): You can put this solution on YOUR website! ``` Hi, 6.2 () miles taking 40min () ```
 real-numbers/632666: (72÷(-4)+3(-4))/(5-(-5))1 solutions Answer 398403 by ewatrrr(10682)   on 2012-07-28 13:10:05 (Show Source): You can put this solution on YOUR website! ``` Hi, If you meant: ```
 Graphs/632667: Find and label the vertex and the line of symmetry f(x) = -2(x+3)^2 1 solutions Answer 398402 by ewatrrr(10682)   on 2012-07-28 13:03:14 (Show Source): You can put this solution on YOUR website! ``` Hi, f(x) = -2(x+3)^2 V(-3,0) and line of symmetry is x = -3 Note: the vertex form of a Parabola opening up(a>0) or down(a<0), where(h,k) is the vertex and x = h is the Line of Symmetry ```
 Equations/632668: A bullet train leaves the station traveling west at 164 mph. a pigeon starts flying east at 40 mph. After two hours, how far apart are the pigeon and the train? I have a diagram and have solved the equation but have struggled with putting my info into a table. Please help. This is my start. rate(mph) train 164 pigeon 40 1 solutions Answer 398401 by ewatrrr(10682)   on 2012-07-28 12:56:32 (Show Source): You can put this solution on YOUR website! ``` Hi, Question states*** Traveling in opposite directions for 2 hours r t D= rt train 164 2 328 pigeon 40 2 80 After two hours, the pigeon and the train are 408 mi apart ```
 Equations/632665: Can you Help me with this equation: (-2/3)D-5/6=(3/4)D+(1/2)D+5/81 solutions Answer 398400 by ewatrrr(10682)   on 2012-07-28 12:47:23 (Show Source): You can put this solution on YOUR website! ``` Hi, |Multiplying thru by 24 so as all denominators = 1 |Solve for D ```
 Percentage-and-ratio-word-problems/632661: in a class of 28 students, 18 pass the final. what percent pass the exam?1 solutions Answer 398399 by ewatrrr(10682)   on 2012-07-28 12:41:11 (Show Source): You can put this solution on YOUR website! ``` Hi, in a class of 28 students, 18 pass the final: 18/28 = .6429 or 64.29% passed ```
 Graphs/632659: Could you help me solve a regression equation problem. profit=0.15x-28 slope1 solutions Answer 398396 by ewatrrr(10682)   on 2012-07-28 12:38:37 (Show Source): You can put this solution on YOUR website! ``` Hi, If I am understanding your question properly P = .15x -28 || As in y = mx + b, where m is the slope and b the y-intercept m = .15 ```
 Signed-numbers/632654: √(b²-4ac;) b = 3, a = -1, c = -21 solutions Answer 398393 by ewatrrr(10682)   on 2012-07-28 12:27:50 (Show Source): You can put this solution on YOUR website! ``` Hi b = 3, a = -1, c = -2 ```
 Money_Word_Problems/632643: Gino,Gary, Gerry and Gemo are going to be paid 847.00 pesos for serving in Mr Pere's gasoline STATION. They each worked 5 hours, except Gerry, Who was 45 minutes late. How much should each one paid? 1 solutions Answer 398390 by ewatrrr(10682)   on 2012-07-28 12:21:51 (Show Source): You can put this solution on YOUR website! ``` Hi each worked 5 hours, except Gerry, Who was 45 minutes late. (together worked ) Each earned: 847/19.25 = 44 pecos/hr Gino, 220 Gary, 220 Gerry, 176 + 11 = 187 Gemo, 220 ```
 Money_Word_Problems/632648: What are the repeating digits in the decimal equivalent of 19/31?1 solutions Answer 398389 by ewatrrr(10682)   on 2012-07-28 12:10:03 (Show Source): You can put this solution on YOUR website! ``` Hi, 19/31 = .612903225806451 ```
 Equations/632634: Given the equation y= -4/3 x + 1 find the coordinates of the point (-6), (-3), and (6,)1 solutions Answer 398378 by ewatrrr(10682)   on 2012-07-28 10:44:43 (Show Source): You can put this solution on YOUR website! ``` Hi, x y = (-4/3)x + 1 -6 9 -3 5 6 -7 Ordered Pairs: (-6,9), (-3,5), (6,-7) Plotting the coordinates and connecting with a line. Line is the graph ofy = (-4/3)x + 1 ```
 decimal-numbers/632621: Write in decimal form (3 x 10^1) + (4 x 10^0). 1 solutions Answer 398377 by ewatrrr(10682)   on 2012-07-28 10:37:00 (Show Source): You can put this solution on YOUR website! ``` Hi, Write in decimal form (3 x 10^1) + (4 x 10^0) 30 + 4 = 34 ```