All categories

3 years ago

Which operation can be used with the augmented matrix below?

Mathematics

1 answer:

ycow [4]3 years ago

5 0

Answer:

Multiply row 2 by-1 and add it to row 3.

Step-by-step explanation:

The given augmented matrix is $\left[\begin{array}{ccc}3&-21&15\\15&8&15\\-2&-1&3\end{array}\right]$

The permissible row operations are:

1. Switching rows

2. Multiplying a row by a nonzero constant.

3. Adding/Subtracting two rows

Therefore the correct option is: Multiply row 2 by-1 and add it to row 3.

You might be interested in

The scores on a certain standardized test follow a normal distribution. The mean score is 76, and the standard deviation is 8.

Inessa [10]

About 4.01% of the test scores in the normal distribution that are greater than 90

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more number and variables.

Z score is given by:

z = (raw score - mean) / standard deviation

Given that mean score is 76, and the standard deviation is 8.

For x > 90:

z = (90 - 76) / 8 = 1.75

P(z > 1.75) = 1 - P(z < 1.75) = 1 - 0.9599 = 0.0401

About 4.01% of the test scores in the normal distribution that are greater than 90

Find out more on equation at: brainly.com/question/2972832

#SPJ1

3 0

2 years ago

Simplify -7xy+x+y+x-3xy

ANEK [815]

Answer:

-10xy+2x+y

Step-by-step explanation: Combine like terms.

-7xy-3xy=-10xy

x+x=2x

y is by itself because there is only one y term

5 0

3 years ago

Help please I'm begging

zmey [24]

Answer:

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

Elena drops her pencil in her cup and notices that it just fits diagonally. the pencil is 17cm long and the cup is 15cm tall. wh

Vadim26 [7]

Hence the answer is 480ml

Step-by-step explanation:

Given Elena wonders how much water it will take to fill her cup. She drops her pencil in the cup and notice it just fit diagonally. The pencil is 17cm long (hypotenes) and the cup is 15cm tall.

To find how much water it can hold

SOLUTION

$\sqrt{x {} ^{ 2} + x {}^{2} + 15 {}^{2} = 17 }$

$2x {}^{2} = 64$

$x {}^{2} = 32$

$x = 5.66$

therefore volume of the cup

$5.66 \times 5.66 \times 15cm|$

480cm³= 480ml

4 0

1 year ago

Which expression is Equivalent to 1/2 (4m-2n+4)

jeka57 [31]

Answer:

-n + 2 m + 2

Step-by-step explanation:

Simplify the following:

(-2 n + 4 m + 4)/2

Factor 2 out of -2 n + 4 m + 4:

(2 (-n + 2 m + 2))/2

(2 (-n + 2 m + 2))/2 = 2/2×(-n + 2 m + 2) = -n + 2 m + 2:

Answer: -n + 2 m + 2

5 0

2 years ago