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2 years ago

Select the correct answer.

Mathematics

1 answer:

Gre4nikov [31]2 years ago

4 0

Answer:

(D) These two matrices cannot be added.

Step-by-step explanation:

Matrices of different shapes can't be added, but they can be multiplied. : ) Have a good day.

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Draw the image of \triangle ABC△ABCtriangle, A, B, C under a dilation whose center is AAA and scale factor is \dfrac{1}{4} 4 1

Phantasy [73]

Answer:

THE FIRST OPTION

Step-by-step explanation:

GIVE ME BRAINLIEST

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2 years ago

What is the value of (-4) (-8)? <br> A -32<br> B -12 <br> C 3 <br> D 32

frozen [14]

Answer:

d the negatives canceled each other out making it positive

6 0

3 years ago

Read 2 more answers

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.3. (Round your ans

Maurinko [17]

Answer:

0.0039 is the probability that the sample mean hardness for a random sample of 12 pins is at least 51.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 50

Standard Deviation, σ = 1.3

Sample size, n = 12

We are given that the distribution of hardness of pins is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

Standard error due to sampling =

$=\dfrac{\sigma}{\sqrt{n}} = \dfrac{1.3}{\sqrt{12}} = 0.3753$

P(sample mean hardness for a random sample of 12 pins is at least 51)

$P( x \geq 51) = P( z \geq \displaystyle\frac{51 - 50}{0.3753}) = P(z \geq 2.6645)$

$= 1 - P(z < 2.6645)$

Calculation the value from standard normal z table, we have,

$P(x \geq 51) = 1 - 0.9961= 0.0039$

0.0039 is the probability that the sample mean hardness for a random sample of 12 pins is at least 51.

3 0

3 years ago

Question 3 (0.5 points)

Ira Lisetskai [31]

Answer:

-4 and 0

Step-by-step explanation:

You just count 2 to the left and 2 to the right

7 0

3 years ago

Find the difference of 1-3/8

Vilka [71]

1-3=-2 so -2/8 is -1/4 so negative one fourth

3 0

3 years ago