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3 years ago

Which matrix does not have an inverse

Mathematics

1 answer:

alexira [117]3 years ago

6 0

Answer:

Doesnt Have a matrix its singular I believe, But I can really help on that

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The digits of a two-digit number differ by 3. If the digits are interchanged, and the resulting number is added to the original

Zanzabum

Answer:

The original number could be 85.

Step-by-step explanation:

Let the 2 digits be x and y.

Let the number be xy then, assuming that x is the larger digit:

x - y = 3.

x = y + 3

Also

10y + x + 10x + y = 143

Substituting for x:

10y + y + 3 + 10(y + 3) + y = 143

22y + 33 = 143

22y = 110

y = 5.

So x = y + 3 = 8.

6 0

3 years ago

Read 2 more answers

A single die is rolled one time. Find the probability of rolling a number greater than 4 or less than 3.

Vika [28.1K]

<u>Answer: </u>

The probability of rolling a number greater than 4 or less than 3 is $\frac{2}{3}$

<u>Solution: </u>

In the given question there are two events as follows:

(a) Rolling a number greater than 4 i.e. A = {5,6}

(b) Rolling a number less than 3 i.e. B = {1,2}

Since a die has 6 numbers,

P(A) = $\frac{2}{6}$ where P(A) is the probability of occurrence of event A and P(B) = $\frac{2}{6}$

Since, Event A and Event B has nothing in common therefore they are mutually exclusive events.

P(A∪B) = P(A) + P(B)

$=\frac{2}{6}+\frac{2}{6}$

$=\frac{4}{6}$

$=\frac{2}{3}$

Therefore the probability of getting a number greater than 4 or less than 3 is $\frac{2}{3}$

7 0

3 years ago

canning operation is designed to fill cans with 14.5 oz of ingredients, on average, with a standard deviation of 0.1 oz. Nine ca

Pavlova-9 [17]

Answer:

SE = 0.025

Step-by-step explanation:

We are given;

Sample mean; x¯ = 14.52

Sample standard deviation; s = 0.075

Sample size; n = 9

Now,formula for standard error of sample mean is;

SE = s/√n

SE = 0.075/√9

SE = 0.075/3

SE = 0.025

3 0

3 years ago

In a family, each brother has as many sisters as brothers, but each sister has twice as many brothers as she has sisters. How ma

daser333 [38]

Answer:

4 brothers and 3 sisters

Step-by-step explanation:

Let x be the number of brothers and y be the number of sisters in the family.

1. Each brother has x-1 brothers and y sisters. If each brother has as many sisters as brothers, then

$x-1=y.$

2. Each sister has y-1 sisters and x brothers. If each sister has twice as many brothers as she has sisters, then

$2(y-1)=x.$

3. Solve the system of two equations:

$\left\{\begin{array}{l}x-1=y\\ \\2(y-1)=x\end{array}\right.\Rightarrow 2(y-1)-1=y,\\ \\2y-2-1=y,\\ \\2y-y=2+1,\\ \\y=3.$

Then

$x=y+1=3+1=4.$

4 0

3 years ago

Summer campers were surveyed about their favorite fruit. The resulting table shows the data collected from the survey. Use the i

NemiM [27]

Answer:

Step-by-step explanation: 90

7 0

3 years ago

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