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trapecia [35]
2 years ago
11

Compute the product using (a) the definition where Ax is the linear combination of the columns of A using the corresponding entr

ies in x as weights, and (b) the row-vector rule for computing Ax. If a product is undefined, explain why. Set up the linear combination of the columns of A using the corresponding entries in x as weights. Select the correct choice below and, if necessary, fill in any answer boxes to complete your choice. (Type the factors and terms of your expression with the column matrices in the same order as they appear in the original matrix. In each term, type first the coefficient and then the column matrix.) The matrix-vector Ax is not defined because the number of columns in matrix A does not match the number of entries in the vector x. The matrix-vector Ax is not defined because the number of rows in matrix A does not match the number of entries in the vector x.
Mathematics
1 answer:
Vsevolod [243]2 years ago
5 0

Answer:

7

Step-by-step explanation:

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5 1/2 x 3 3/4 please help
Svetach [21]

Answer:

5 1/2 is also known as 11/2 and 3 3/4 is also know as 15/4. Now times 11/2 x 15/4. 165/8 is the answer i think

Step-by-step explanation:

you make everything an improper fraction then times it

3 0
2 years ago
Justify which of the following equations is a quadratic equation. If the equation is quadratic what is the value of a, b & c
White raven [17]

Answer:

x=5

Step-by-step explanation:

18x-11x-35=0

7x-35=0

7x=35

x=5

8 0
3 years ago
A player at a fair pays Rs. 100 to roll a dice. The player receives Rs. 50 if the number of dots facing up is equal to 5, Rs. 20
FinnZ [79.3K]

Answer:

The dice has 6 options:

if the outcome is 5, player wins 50

if the outcome is 6, player wins 200

if the outcome is another number, the player does not win anything.

Now, remember that the expected value can be written as:

E = ∑xₙpₙ

where xₙ is the event n, and pₙ is the probability of that event.

for a dice, the probabilty for each number is 1/6

The expected value is:

E = (1/6)*(0 + 0 + 0 + 0 + 50 + 200) = 41.66

The expected gain will be E - 100 (because the player pays 100 in order to play)

Then the expected gain is:

G = 41.66 - 100 = -58.33

The standard deviation can be written as:

s = √( ∑(x - x)^2/n)

where x is the mean, in this case the mean is:

(200 + 50 + 4*0)/6 = 41.66  and n = 6.

s = √( (1/6)*(4*(0 - 41.66)^2 + (50 - 41.66)^2 + (200 - 41.66)^2) ) = 73

So we have a lot of standard deviation on Y.

5 0
3 years ago
Choose the statement below which correctly compares the numbers 36,899 and 34,901.
Elza [17]
Hi there! The correct answer is A.

Explanation
> means "larger"
< means "smaller"
= means "equal to"

36,899 is larger than 34,901 and therefore
36,899 > 34,901
Hence, A is correct.
3 0
2 years ago
Read 2 more answers
Rewrite the expression in the form k x y^n
Ostrovityanka [42]

Answer:

4*y^{1/7}

Step-by-step explanation:

Given

\frac{8y^{2} }{2\sqrt[4]{y} }

it can be written as we

=\frac{8y^{2} }{2*y^{1/4}  }

= \frac{4y^{2} }{y^{1/4}  }

= 4y^{2-1/4}

= 4y^{1/7}

Therefore the given solution is in the form of k * y^n

5 0
2 years ago
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