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Tutors Answer Your Questions about Matrices-and-determiminant (FREE)
Question 634104: After the private screening of a new television pilot, audience members were asked to rate the new show on a scale of 1 to 10 (10 being the highest rating). From a group of 140 people, the following responses were obtained.
Rating 1 2 3 4 5 6 7 8 9 10
Frequency of
Occurrence 4 4 3 6 17 20 22 24 11 29
Let the random variable X denote the rating given to the show by a randomly chosen audience member. Find the probability distribution associated with these data.
Rating 1 2 3 4 5 6 7 8 9 10
P(X = x)
Click here to see answer by ewatrrr(10682)   |
Question 634329: please help.
every time i tried the equation in my calculator it never worked.
question: the average number of MP3 players sold weekly at three different stores is given by the matrix. the selling price for the ipod is 240.00, the nano sells for 199.00 and the zen sells for 99.00. use the matrix multiplication to find revenue for each store.
ipod nano zen
circuitcity 50 75 80
bestbuy 45 79 63
target 58 67 98
Click here to see answer by jsmallt9(3296) |
Question 636091: using x,y,and z as variables write the system for linear equations
[9,1,0,8,|6]
[-1,5,1,0|-12]
[7,0,0,3|-9]
[0,4,0,-4|8]
Click here to see answer by jim_thompson5910(28705) |
Question 639488: Good day
If i have the following matrices :
A=
x^2 +4, log1
a+2 , b
and
B=
4, y
3a-1, -1
To get A=B
the unknowns must assume the following values
A. x = -2 , y = 0 , a = - 3/2 , b = -1
B. x = +2 , y = 0 , a = 3/2 , b = -1
C. x = 0 , y = 0 , a = 3/2 , b = -1
D. x = ±2 , y = 1 , a = -3/2 , b = 1
Thanks
Click here to see answer by lynnlo(4169) |
Question 640341: hello sir, can you tell me, how we know that which Row(column) operation should we
use in the first step of determinant when we are solving it....i am asking it because you know determinant has many ways to solve.
for ex: Let A be a determinant.
|29 26 22|
A = |25 31 27|
|63 54 46|
it has many ways to solve, some give exact answer and some wrong answer.
then how we know which operation we have to apply??
kindly reply fast.
Click here to see answer by Edwin McCravy(8999)  |
Question 645725: how would you write an equation for this problem and solve it?
9.) two investments were made totaling $8800. for a certain year these investments yielded $1326 in simple interest. part of the $8800 was invested at 14% and part at 16%. find the amount invested at each rate.
Click here to see answer by solver91311(17077)  |
Question 650573: how would you write an equation for this problem and solve it:
the sum of three numbers is 5. the first number minus the second plus the third is 1. the first minus the third is 3 more than the second. find the numbers
Click here to see answer by stanbon(57960) |
Question 650573: how would you write an equation for this problem and solve it:
the sum of three numbers is 5. the first number minus the second plus the third is 1. the first minus the third is 3 more than the second. find the numbers
Click here to see answer by MathTherapy(1480)  |
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