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Vikentia [17]
3 years ago
11

Which of the matrixes can be added together? Choose all that apply.

Mathematics
1 answer:
katen-ka-za [31]3 years ago
4 0
<h3>Answer: A and C</h3>

Both matrices are 1 x 4 matrices. This notation says there is 1 row and 4 columns. The number of rows must match up, as well as the number of columns, in order for matrix addition to be possible. This is so the corresponding elements pair up and add together. For instance, the 5 and -2 pair up and add together for matrices A and C.

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pls There are (4^9)^5 ⋅ 4^0 books at the library. What is the total number of books at the library? A.4^9 B. 4^45 C. 4^46 D. 1  
jekas [21]
We know that there are (4^9)^5 ⋅ 4^0 at the library, so we just need to simplify this to get the answer.
(4^9)^5 ⋅ 4^0
=(4^9)^5×1
=(4^9)^5
=4^9×5
=4^45. As a result, the total number of books at the library is 4^45 books at the library or B is the final answer. Hope it help!
6 0
3 years ago
(-10)³ * 3 * 2 * (-7 ) <br> Please help
viktelen [127]

Answer:

i think it is 42000 but i could be wrong

Step-by-step explanation:

8 0
2 years ago
A) make U subject of the formula E= m/2g(v^2-u^2)
ollegr [7]

Answer:

u = v2−2Egm−−−−−−−√

Step-by-step explanation:

2Eg = 2g (M2g(V2−U2)

2Eg = m(V2 - U2)

2Eg - mV2 - mU2

mU2 = mV2 - 2Eg

mU2m=mV2−2Egm

U2 = mV2−2Egm

= mV2m−2Egm

U2 = V2 - 2Egm

U = V2−2Egm−−−−−−−−√

7 0
3 years ago
The course itself is 2/5 of a mile long. If Blake completed the four laps in 12 minutes, then his average speed around the track
Blizzard [7]
2*4=8
8/5=1.6
1.6miles:12minutes
60/12=5
5*1.6=8
Blake's avg. speed is 8mph

7 0
3 years ago
Using a sample of 40 patients from a local hospital, researchers measured cholesterol level in an attempt to estimate the mean c
Burka [1]

Answer:

B. NON-REPRESENTATIVE

Step-by-step explanation:

<em>The sample does not represent the population as a researcher is taking a sample from the hospital where the cholesterol level of the patient is generally high and the researcher is not randomly selecting the U.S. citizens.</em>

Thus, option (B) is correct.

Further, the sample is a subset of the population and it is easy to analyze as compared to the population.

The sample is said to be representative if it represents the whole population.

5 0
3 years ago
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