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notsponge [240]
3 years ago
5

Find two different 2 by 2 matrices a and b such that ab=ba

Mathematics
1 answer:
stiv31 [10]3 years ago
8 0
Let \mathbf A=\mathbf I be the identity matrix. Then pick whatever matrix you like for \mathbf B.
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PLEASE HELP!! HURRY BUT I DON'T WANT GUESSES
Lorico [155]
The square on the hypotenuse is skew and impossible to visually validate. There's nothing to sum. It is a simple calculation to note that <span><span><span>32</span>+<span>42</span>=<span>52</span></span><span><span>32</span>+<span>42</span>=<span>52</span></span></span><span>, but its picture doesn't 'say' that the angle between the 3 and 4 sided square must be 90 degrees.


</span>
7 0
3 years ago
Sabrina threw a coin from a building 160 feet high at an initial speed of 30 feet per second. How many seconds will it take the
nirvana33 [79]
Without speeding up it would take 5 1/3 seconds.. not sure if it speeds up in the question?
3 0
3 years ago
Find the value of x in the triangle shown below.
Sloan [31]

Answer:

33 is the answer

Step-by-step explanation:

6 0
3 years ago
An engineer is going to redesign an ejection seat for an airplane. the seat was designed for pilots weighing between 130lb and 1
Vlad [161]

Answer: 0.4758

Step-by-step explanation:

Given : Mean : \mu=137\text{ lb}

Standard deviation : \sigma =28.9\text{ lb}

Also, the new population of pilots has normally distributed .

The formula to calculate the z-score :-

z=\dfrac{x-\mu}{\sigma}

For x=130 lb .

z=\dfrac{130-137}{28.9}=-0.2422145\approx-0.24

For x=171lb.

z=\dfrac{171-137}{28.9}=1.1764705\approx1.18

The p-value =P(-0.24

=0.8809999-0.4051651=0.4758348\approx0.4758348\approx0.4758

Hence, the required probability : 0.4758

6 0
3 years ago
A survey indicated that 3 out of 5 doctors use brand X aspirin. If 2000 doctors were surveyed, how many used brand X?
Blizzard [7]
2000(3/5)

6000/5

1200

So 1200 doctors used brand X
8 0
3 years ago
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