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Mixture_Word_Problems/362936: Can someone show me a table for the following equation? a spice mixture is 25% thyme. How many grams of thyme must be added to 12 g of the mixutre to increase the thyme content to 40%?
1 solutions
Answer 258691 by edjones(7569)   on 2010-10-27 23:13:56 (Show Source):
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Probability-and-statistics/362939: Hello, Can someone please check my answer. Thank you.
Essay; show all work. A community 5K run will award $50 to the winner. 80 people enter the race, and they each pay an entry fee of $20. Assuming they are all equally likely to win, what is a fair price for the competition? Round to the nearest cent.
E = 50
E = 50-20 = 30
Fair price for the competition
To make the game "fair", the community should only
charge $2.67 to play the game.
1 solutions
Answer 258683 by edjones(7569) on 2010-10-27 22:46:16 (Show Source):
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Permutations/362680: From a group of ten people, can you form more committees of 2 or more different commitees of eight?
This is a puzzler for my math class and I am aproaching if from the veiw that there are more different commitees of eight rather than 2. Because one can be in more committtes if there is eght people. Am I even on th eright track?
1 solutions
Answer 258562 by edjones(7569) on 2010-10-27 19:23:59 (Show Source):
You can put this solution on YOUR website!Do the math!
This is a combination problem because arrangement is not important.
10C2=45
10C8=45
You can form the same number of committees.
.
Ed
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Volume/362724: I have a square with a cirlce inside the square the square sides are 32cm the cirlce inside has a radius of 16cm what is the area of the square outside the circle (the four corners outside the circle) yet still inside the square
1 solutions
Answer 258548 by edjones(7569) on 2010-10-27 19:12:14 (Show Source):
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Probability-and-statistics/362306: Elected Board of Directors. There are 12 members on the board of director for the Newport General Hospital. (a) If they must elect a chairperson, first vice chairperson, second vice chairperson and secretary, how many different slates of candidates are possible? (b) If they must form an ethics subcommittee of four members, how many different subcommittees are possible?
1 solutions
Answer 258178 by edjones(7569) on 2010-10-26 21:03:29 (Show Source):
You can put this solution on YOUR website!Order is important.
nPr: Permutation of n things r at a time. = n!/(n-r)!
12P4=11,880 different subcommittees are possible.
.
Ed
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expressions/362224: The problem in the book is 16 + T < 42 and the object is to figure out the value of T...however, I am not coming up with an answer less than 42. Please help :)
1 solutions
Answer 258163 by edjones(7569) on 2010-10-26 20:38:38 (Show Source):
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Equations/362269: well, im doin a project about two stepp equations and i can't seem to find a problem with the answer of 12, can u give me a problem that i can answer and the answer will be 12?
1 solutions
Answer 258150 by edjones(7569) on 2010-10-26 20:22:05 (Show Source):
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Quadratic_Equations/362030: Good Afternoon, Sam here. I am having a terrible time trying to solve this story or word problem. The trouble I am having is getting the exact answer as the book shows. Could someone who is an expert is this area please show me, by covering all steps how I would attack this type of problem.
Section 11.5, #9
Directions: Solve
The total function p(x) for a company producing x thousand units is given by
P(x)=-〖2x〗^2+28x-80 (it should be -2x squared)
Find the values of x for which the company makes a profit. [Hint: company makes a profit when P(x)>0].
the answer my textbook provides is: x is between 4 thousand units and 10,000 units.
I have no idea how to even get started, or what steps I should use to get the correct answer. Your help is greatly appreciated.
1 solutions
Answer 258065 by edjones(7569) on 2010-10-26 15:44:58 (Show Source):
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Polynomials-and-rational-expressions/362032: I need help on factoring polynomials math is my weakest subject and I need a lot of help on it.
Here are some examples of problems I need help on:
1. 12m^5n^2+9m^4n+6m^3n^2
2. 6x^2+3x-15
3. 6x^4-10x^3+3x^2
and I would really appreciate if I can have the steps on how to solve these and problems like these because I'm not really understanding how the book is explaining it. Thank you.
1 solutions
Answer 258058 by edjones(7569) on 2010-10-26 15:15:31 (Show Source):
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Probability-and-statistics/362036: 2.100 ) The probability that a one-car accident is due to faulty brakes is 0.04 , the probability that a one-car accident is correctly attributed to faulty brakes is 0.82 , and the probability that a one-car accident is incorrectly attributed to faulty brakes is 0.03 . What is the probability that :
a) A one-car accident will be attributed to faulty brakes;
b) A one-car accident attributed to faulty brakes was actually due to faulty brakes .
1 solutions
Answer 258057 by edjones(7569) on 2010-10-26 15:08:37 (Show Source):
You can put this solution on YOUR website!a)
.04*.82=.0328
.0328 + 0.03 = .0628 Probability a one-car accident will be attributed to faulty brakes.
.
b)
.04*.82=.0328
.
Ed
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Probability-and-statistics/362042: A student is taking a multiple choice exam with 16 questions. Each question has five alternatives. If the student guesses on 12 of the questions what is the probability she will guess at least 8 correct?
1 solutions
Answer 258056 by edjones(7569) on 2010-10-26 14:58:45 (Show Source):
You can put this solution on YOUR website!x=.8 and y=.2
Partly expand (x+y)^12
x^12+12x^11y+66x^10y^2220x^9y^3
=.7946 Probability 9 or more will be wrong.
1-.7946
=.2054 probability she will guess at least 8 correct.
.
Ed
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Probability-and-statistics/361911: a sample poll of 1000 voters reveal the following information about candidate A, B and C who are nominated for three different offices. 200 are in favor of candidate A, 500 are in favor of candidate B, 500 are in favor of candidate C, 100 in favor of both A and B,100 in favor of both A and C, 250 in favor of both candidate B and C, 100 in favor of all three candidates.
Donate by A, B and C the event that the selected product favors candidates A, B and C respectively.
Required: Are the three events statistically independent, explain.
1 solutions
Answer 258048 by edjones(7569) on 2010-10-26 14:41:25 (Show Source):
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Polynomials-and-rational-expressions/361955: I'm still trying to finish this packet I have... So here's another few questions I'm having a hard time with.
I really appreciate the help, and I reallyyy need it!
1. r to the third + r^ - 6r
2. x^ - 14x + 49
x^ + 1 over 2x + 1 over 16
(as fractions)
3. 81m to the fourth - 16
4. 4- 2q - 6p + 3pq
5. 3n to the third + 12n^ - 36n
6. r^ + r + 3
7. 16x^ - 14x + 3
8. 7b^ - 42b + 56
9. y^ + 4y - 45
10. 8a^ + 23a - 3
Thank you againnn! I just really need to get this class out of my way. It's holding me back from continuing other work and classes that I don't even struggle with. I'm sure you can imagaine my frustration with this! But thank you for the help...
1 solutions
Answer 258030 by edjones(7569) on 2010-10-26 13:35:45 (Show Source):
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Polynomials-and-rational-expressions/361963: Another few I need a quick hand with to get it done. It's due tomro and I'm pressured for time but I need to finish and pass my test! Please continue helping me! It's greatly appreciateddd!
These are still factoring polynomials
1. 4k^ - 25
2. -16^ - 48x - 36
These ones say to solve each equation. I think these might be easier but I'd like to see your work to show me and make sure I'm doing it right. Thank youuu!
3. (y + 9)(2y - 3) = 0
4. m^ + 2m - 15 = 0
5. 8r^ = 24r
6. b2 - 49 = 0
7.(3c + 16) = 0
8. z to the fourth + 8z to the third - 9z^ = 0
9. (y-7)(2y^ + 7y - 15) = 0
1 solutions
Answer 258027 by edjones(7569) on 2010-10-26 13:29:53 (Show Source):
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Probability-and-statistics/361985: In a class of 28, 4 out of 16 girls and 7 out of 12 boys wear contact lenses. A student is chosen randomly from the class.
(a) What is the probability that the chosen student is not wearing contact lenses?
(b) What is the probability that the chosen student is a girl or someone who does not wear contact lenses?
(c) If the chosen student is wearing contact lenses, what is the probability that the chosen student is a boy?
(d) If G represents the event that the chosen student is a girl and C represents the event that the chosen student wears contact lenses, determine whether events G and C are independent.
1 solutions
Answer 258024 by edjones(7569) on 2010-10-26 13:21:56 (Show Source):
You can put this solution on YOUR website!Make a table with Boys and Girls at the top and CLs and No CLs on the side and fill in the 4 boxes with the appropriate numbers for questions a) thru c).
a) 17/28
.
b) 21/28
.
c) 7/11
.
d) Event G and C are not independent because P(G|C)(.37) in not equal to P(G)(.59).
.
Ed
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