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richwmiller answered: 9132 problems
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Probability-and-statistics/285509: Can someone help me PLEASE, I am completely stuck and I can not even think on where to begin, I have tried and tried and come up with different answers each time. A teacher wishes to compare two different groups of students with respect to their mean time to complete a standardized test. The time required is determined for each group. The data summary is given below. Test the claim at = 0.10, that there is no difference in variance. Give the critical region, test statistic value, and conclusion for the F test. n1 = 40 s1 = 44 n2 = 60 s2 = 74 = 0.10 I need to find the · State the null and alternate hypotheses.Determine which test statistic applies, and calculate it.Determine the critical region. State your decision: Should the null hypothesis be rejected?” You are given the following data. Test the claim that there is a difference in the means of the two groups. Use = 0.01. Group A Group B = 7 = 10 = 12 = 11 = 66 = 92 State the null and alternate hypotheses Determine which test statistic applies, and calculate it Determine the critical value(s). State your decision: Should the null hypothesis be rejected? I need these answers A.S.A.P. please I am already having a very hard time with this class and my teachers patience is wearing very thing, Thank you sooooo very much for your time 1 solutions Answer 207090 by richwmiller(9143)   on 2010-03-26 19:04:45 (Show Source): You can put this solution on YOUR website! If you tried and tried so much why don't you tell us what you tried so we can guide you? Do not I repeat Do not ever tell us you need an answer asap on this website. Everyone needs their answers as soon as possible. You are wearing our patience thin. What makes you so special?

Systems-of-equations/285635: Having trouble solving , my instructions are just "solve the equation". 1 solutions Answer 207088 by richwmiller(9143)   on 2010-03-26 18:59:50 (Show Source): You can put this solution on YOUR website! So what was your problem?

Numbers_Word_Problems/285689: Could you please set up this word problem? So I may then solve it. If three times the smaller of two consecutive integers is added to four times the larger, the result is 116. Find the smaller integer. please use x as your variable. 1 solutions Answer 207087 by richwmiller(9143)   on 2010-03-26 18:53:55 (Show Source): You can put this solution on YOUR website! two consecutive integers two numbers one after the other x and x+1 the smaller is x 3x+4*(x+1)=116 If three times 3x the smaller of two consecutive integers is added + to four times the larger 4(x+1), the result = is 116.

Circles/285687: The manager of a sandwich shop is planning to make a cirlce graph showing the types of sandwiches sold in one day. The table below summarizes these data. Sandwiches Sold in One Day roast beef. 195 turkey-and-cheese 125 ham-and-cheese. 75 vegetable. 50 other. 55 what central angle should the manager use for the section representing the ham-and-cheese sandwich? 1 solutions Answer 207086 by richwmiller(9143)   on 2010-03-26 18:51:03 (Show Source): You can put this solution on YOUR website! Add up the different types sold and divide each type by that number to get the percentage. Let's say all totaled there arex sandwiches sold. Then there would be 195/x roast beef sold. Give that much of the circle to roast beef Do the same for ham and cheese 75/x

Linear-equations/285685: What is the effect on the graph of the equation y = x^2 + 1 when it is changed to y = x^2 + 5 1 solutions Answer 207085 by richwmiller(9143)   on 2010-03-26 18:47:30 (Show Source): You can put this solution on YOUR website! graph them and find out! Oh i forgot you want us to to the work.

Graphs/285644: Write an equation of the line containing the given point and parallel to the given line. Express the answer in the form y=mx+b (7,9); 7x+y=2. The equation of the line is y=. I have tried solving this and each time I get a different answer. Now I'm confused. 1 solutions Answer 207084 by richwmiller(9143)   on 2010-03-26 18:46:30 (Show Source): You can put this solution on YOUR website! So have you looked for similar problems or lessons ? No of course not. What have you done? You said you tried several attempts but without telling us anything.

Mixture_Word_Problems/285647: A pharmacist wants to make a solution that is 60% alcohol. On the shelf are two bottles of 40% and 20% strength alcohol. Explain the step(s) and the outcome of this mixture. 1 solutions Answer 207083 by richwmiller(9143)   on 2010-03-26 18:43:35 (Show Source): You can put this solution on YOUR website! You can't get stronger solutions than you start with, without evaporation or distilling.

Quadratic_Equations/285653: i need more than 1 problem please. heres the problems: evaluate: 3a + (k + 5b) - 9=? if a=7 & b=4 & k=10 find the 7th term in the sequence: 20 1/2, 23 1/3, 26 1/6 29... evaluate: -6a-4b= ? if a=5 and b=3?? please! thanks 1 solutions Answer 207082 by richwmiller(9143)   on 2010-03-26 18:33:06 (Show Source): You can put this solution on YOUR website! The rules are very clear one problem at a time not two not three. Not only that but the rules also say no similar problems. Why do you think you can ignore the rules? Because you put a whining please? Also limit yourself to 4 problems sent separately per day. Believe it or not because you hogged Stan's time for three problems, two people with real problems will not get their problems answered. Is that fair?

Points-lines-and-rays/285651: It has been a really long time since high school so I am not sure what to do or where to look to learn how to do this! Thanks Given two points (x1, y1) and (x2, y2), derive the equation of the line that passes through those two points and write it in the form y = mx + b. This is called the slope-intercept form of the equation of the line because the two parameters m and b represent the slope and y-intercept of the line. 1 solutions Answer 207081 by richwmiller(9143)   on 2010-03-26 18:24:01 (Show Source): You can put this solution on YOUR website! You can look in your math book. What a novel idea! You can look online. You can go to algebra.com and have someone else do it for you.

Equations/285485: 5p/7-18=-43 1 solutions Answer 207080 by richwmiller(9143)   on 2010-03-26 18:20:11 (Show Source): You can put this solution on YOUR website! nice equation! what is the numerator and denominator? Do you have a question? Did I tell you what a nice equation you have? You can be proud.

Polynomials-and-rational-expressions/285494: factor this polynomial: 4x^3-26x^2+48x 1 solutions Answer 207079 by richwmiller(9143)   on 2010-03-26 18:18:13 (Show Source): You can put this solution on YOUR website! coming soon a factor polynomial category. first factor 2x go ahead I'll wait.

Geometry_proofs/285672: i need to know the steps for doing proofs 1 solutions Answer 207078 by richwmiller(9143)   on 2010-03-26 18:16:37 (Show Source): You can put this solution on YOUR website! First sign up for a math class buy the book attend class do the homework

Rectangles/285671: What are the length and width of a rectangular cooking surface whose perimeter is 198 square inches? 1 solutions Answer 207077 by richwmiller(9143)   on 2010-03-26 18:15:30 (Show Source): You can put this solution on YOUR website! not enough info

Rational-functions/285596: Write an equation for the translation of y=2/x with the given asymptotes. x=1 y=1 and x = 5 y= 0.5 Help? 1 solutions Answer 207076 by richwmiller(9143)   on 2010-03-26 18:14:36 (Show Source): You can put this solution on YOUR website! x can't be zero since it is a denominator. Your x's and y's don't match the equation.

Square-cubic-other-roots/285668: simplify the square root of 225 1 solutions Answer 207075 by richwmiller(9143)   on 2010-03-26 18:11:52 (Show Source): You can put this solution on YOUR website! 10^2=100 20^2=400 it has to be something between 10 and 20 why not try your calculator? Every one has a calculator on their computer. Yes even you! Ok I'll be over to do it for you. Leave the lights on and leave a glass of milk.

Expressions-with-variables/285536: I need help figuring out this problem: Melanie can paint a certain barn by herself in x days. Her helper melissa can paint the same barn by herself in 2x days. write a rational expression for the fraction of the barn that they complete in one day by working together. Evaluate the expression for x=5. would it be written as 2x+5x 1 solutions Answer 206971 by richwmiller(9143)   on 2010-03-26 09:54:19 (Show Source): You can put this solution on YOUR website! r/x+r/2x=1 2r+r=2x 3r=2x r=2x/3 in one day they can do 3/(2x) It takes them r days working together. 3r/2=x 3r=2x if x=5 r/5+r/10=1 2r+r=10 3r=10 r=10/3 =3 1/3 days if one can do it in 5 days the other in 10 days together they can do it in 3 1/3 days in one day one does 1/5 and the other 1/10 2/10+1/10 they can do 3/10 in one day working together.

Equations/285472: which ordered pair are solutions? 3b + b = 8 1 solutions Answer 206916 by richwmiller(9143)   on 2010-03-25 22:25:43 (Show Source): You can put this solution on YOUR website! there is one solution b=2 no ordered pair

Graphs/285429: Write an equation of the line containing the given point and parallel to the given line. Express your answer in the form y=mx+b(4,5);x+7y=9 1 solutions Answer 206898 by richwmiller(9143)   on 2010-03-25 20:37:57 (Show Source): You can put this solution on YOUR website! no graphing involved find another category.

Quadratic_Equations/285433: Hello. My name is Mia. I don't know how to put the following question into a rational expression. Dr. Taylor can see 10 patients in 5 hours. At this rate, how long would it tke him to see 40 patients? 1 solutions Answer 206896 by richwmiller(9143)   on 2010-03-25 20:36:18 (Show Source): You can put this solution on YOUR website! 10 in 5 hours 20 in 10 30 in 15 40 in 20 or 40/10=4 5*4=20 At that rate the last 20 patients have died already.

Polynomials-and-rational-expressions/285425: Having issues solving this one: (x-5)²-6(x-5)+8. I came up with the answer (x-11)(x+3) but that's not the right answer...please help. Used the u²+bu+c formula and Im missing something here. 1 solutions Answer 206895 by richwmiller(9143)   on 2010-03-25 20:32:35 (Show Source): You can put this solution on YOUR website! let's say u= (x-5) u^2-6u+8 factors are -4 and -2 (u-4)*(u-2) now substitute x-5 for u (x-5-4)*(x-5-2) (x-9)*(x-7) Which works. I can't for the life of me think how you got (x-11) and (x+3). if you had calculated out the original expression you should have gotten x^2-16x+63 which also factors to (x-9)(x-7)

Percentage-and-ratio-word-problems/285424: Six nurses raised $1000 fir charity. They made and unmade a bed 926 times. This took place on a hospital lawn over 24 hours. How many seconds were the nurses able to make and unmake a bed? 1 solutions Answer 206894 by richwmiller(9143)   on 2010-03-25 20:20:13 (Show Source): You can put this solution on YOUR website! (24*60*60)/926=93.30 seconds a little over a minute and one half 1.55 minutes

Quadratic_Equations/285392: how do you find zeroes in a quadratic function? 1 solutions Answer 206892 by richwmiller(9143)   on 2010-03-25 20:11:13 (Show Source): You can put this solution on YOUR website! The zeroes are the "answers" or roots. There are several ways. They are called zeroes because we set each factor equal to zero to find the roots

Exponents-negative-and-fractional/285416: Help me solve this problem: (9^3/5)^2/3 1 solutions Answer 206891 by richwmiller(9143)   on 2010-03-25 20:07:07 (Show Source): You can put this solution on YOUR website! It may seem like a problem to be solved to you but it is an expression and therefore has no solution. Expressions can be factored or simplified but not solved. Equations are solved. 3^(4/5)is the simplified form. 9^((3/5)*(2/3))=9^2/5=3^(2*(2/5))=3^(4/5)

Systems-of-equations/285405: solving systems using substitution y=4x+3 2x-3y+21 1 solutions Answer 206889 by richwmiller(9143)   on 2010-03-25 20:00:30 (Show Source): You can put this solution on YOUR website! there is only one equation otherwise substitute 4x+3 for y in the second but there is no second equation. Do you see an equal sign?

Radicals/285414: How do I factor 42-13t+t^2 1 solutions Answer 206888 by richwmiller(9143)   on 2010-03-25 19:57:02 (Show Source): You can put this solution on YOUR website! coming soon a special factoring category. factoring polynomials and finding prime factors. 42-13t+t^2 rearrange t^2-13t+42 1*42=42 find factors of 42 that add up to -13 -6 and -7 (t-7) (t-6)

Quadratic_Equations/285407: 1. Can some one solve this -x^2 + 4x + 4 1 solutions Answer 206886 by richwmiller(9143)   on 2010-03-25 19:53:14 (Show Source): You can put this solution on YOUR website! You stumped us all! It isn't an equation and so can't be solved! One problem at a time and no similar problems. What makes you special?

Graphs/285404: write an equation of the line containing the given point and perpendicular to the given line, Express your answer in the form y=mx+b (3,7);7x+y=8 1 solutions Answer 206885 by richwmiller(9143)   on 2010-03-25 19:49:51 (Show Source): You can put this solution on YOUR website! slope is -a/b =-7/1=-7 perpendicular slope is 1/7 7=3/7+b 49=3+7b 46=7b 46/7=b y=x/7+46/7 slope intercept form 7y=x+46 check 7=3/7+46/7 49=3+46 ok

Linear-equations/285402: Is there a simple way of remembering slope-intercept and point-intercept? Such as a word or phrase. Thank you 1 solutions Answer 206881 by richwmiller(9143)   on 2010-03-25 19:38:46 (Show Source): You can put this solution on YOUR website! What is it you want to remember? y=mx+b slope intercept m=slope b= y intercept What is the problem? You can remember all kinds of stuff to play video games and remember songs but you can't put a little math in your head?

Volume/285367: what is the volume for this problem height=10 centimeters, radius = 6.5 centimeters for a cylinder 1 solutions Answer 206879 by richwmiller(9143)   on 2010-03-25 19:33:39 (Show Source): You can put this solution on YOUR website! What is the volume of a cylinder? V=the area of the circle of the base times the height. V=pi*r^2*h pi=3.14 plug them in and solve for V

Divisibility_and_Prime_Numbers/285321: DESCRIBE A SITUATION IN WHICH THE LEAST COMMEN MULTIPLE OF THE TWO NUMBERS IS ONE OF THE NUMBERS 1 solutions Answer 206860 by richwmiller(9143)   on 2010-03-25 18:09:26 (Show Source): You can put this solution on YOUR website! One of the numbers is prime. Stop shouting (all caps is shouting). Very rude on the internet and harder to read. We have upper case and lower case for a reason!

Functions/285366: f(x) = 3x +2 where f(x + 1) 1 solutions Answer 206859 by richwmiller(9143)   on 2010-03-25 18:03:36 (Show Source): You can put this solution on YOUR website! f(x+1) = 3(x+1) +2 f(x+1)=3x+3+2 one problem at a time