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otez555 [7]
3 years ago
10

Help me please with this question

Mathematics
1 answer:
lukranit [14]3 years ago
3 0

Answer:

see explanation

Step-by-step explanation:

2B + 3C

= 2 \left[\begin{array}{ccc}4&-5\\-2&1\\\end{array}\right] + 3 \left[\begin{array}{ccc}1&-1\\-6&3\\\end{array}\right]

Multiply each element in the matrices by the scalar quantity, that is

= \left[\begin{array}{ccc}8&-10\\-4&2\\\end{array}\right] + \left[\begin{array}{ccc}3&-3\\-18&9\\\end{array}\right]

Add corresponding elements from each matrix

= \left[\begin{array}{ccc}8+3&-10-3\\-4-18&2+9\\\end{array}\right]

= \left[\begin{array}{ccc}11&-13\\-22&11\\\end{array}\right]

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A square with a side length of x+6 has the same perimeter as an equilateral triangle with a side length of 4 x what is the area
prohojiy [21]
The perimeter of the equilateral triangle is 3s and s=4x so the perimeter is:

12x

And we are told that the perimeter of the square is the same.  And that perimeter is 4s where s=(x+6) so that perimeter is equal to

4x+24, and again, we are told that these two values are equal so we can solve for x...

12x=4x+24

8x=24

x=3 and if x=3 then the side length is (x+6)=9

So the area of the square is always A=s^2 and s=9 thus:

A=9^2

A=81 u^2
7 0
3 years ago
Let X = the time between two successive arrivals at the drive-up window of a local bank. If X has an exponential distribution wi
LuckyWell [14K]

Answer:

a) E(X)=1

b) σ=1

c) P(X>1)=0.368

d) P(2<X<5)=0.128

Step-by-step explanation:

We have X: "the time between two successive arrivals at the drive-up window of a local bank", exponentially distributed with λ = 1.

a) We have to compute the expected time between two successive arrivals.

The expected value for X as it is exponentially distributed is:

E(X)=\dfrac{1}{\lambda}=\dfrac{1}{1}=1

b) We have to compute the standard deviation of X.

The standard deviation is calculated as:

\sigma=\dfrac{1}{\lambda}=\dfrac{1}{1}=1

c) The probability that X is larger than 1 (P(X>1))

We can express the probability as:

P(X>t)=e^{-\lambda t}\\\\P(X>1)=e^{-\lambda\cdot 1}=e^{-1}=0.368

d) The probability that X is between 2 and 5 (P(2<X<5))

P(X>t)=e^{-\lambda t}\\\\\\P(25)\\\\P(2

4 0
3 years ago
1)What are the first five terms of the sequence given by the formula an=4n+1 ?
koban [17]

Answer:1) c. 5,9,13,17,21

2)  a. a1=8, an=an-1 -2

Step-by-step explanation: 1) an=4n+1

    ⇒ a1=4×1+1=5

         a2=4×2+1=9

          a3=4×3+1=13

          a4=4×4+1=17

           a5=4×5+1=21

2) clearly a1=8 and then the terms of series are decreasing by 2

so, an=an-1 -2

4 0
3 years ago
Read 2 more answers
Is - 5/12 equivalent to 5/-12
Kamila [148]

Answer:

Yes

Step-by-step explanation:

-5/12 is the same as saying 5/-12

Hope this helps! have a nice day! Please consider making me Brainliest

5 0
3 years ago
6. What is the distance between -3 and 2 on the number line?
icang [17]

Answer:

5 jumps to the right

<h2><u><em>hope it helps :D</em></u></h2>

7 0
3 years ago
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