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grin007 [14]
3 years ago
5

Hello pls help me with two of these questions;)

Mathematics
1 answer:
Yuliya22 [10]3 years ago
3 0

Answer:

1-A-15

2-C

Step-by-step explanation:

7-21 is an increase by 3 times, so 5*3=15

The second is kinda blurry, so it's a little hard to explain.

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The number of electrical outages in a city varies from day to day. Assume that the number of electrical outages ( x ) in the cit
forsale [732]

Answer:

Therefore, the mean and the standard deviation for the number of electrical outages (respectively) are 0.26 and 0.5765 respectively.

Step-by-step explanation:

Given the probability distribution table below:

\left|\begin{array}{c|cccc}x&0&1&2&3\\P(x)&0.8&0.15&0.04&0.01\end{array}\right|

(a)Mean

Expected Value, \mu =\sum x_iP(x_i)

=(0*0.8)+(1*0.15)+(2*0.04)+(3*0.01)

=0+0.15+0.08+0.03

Mean=0.26

(b)Standard Deviation

(x-\mu)^2\\(0-0.26)^2=0.0676\\(1-0.26)^2=0.5476\\(2-0.26)^2=3.0276\\(3-0.26)^2=7.5076

Standard Deviation =\sqrt{\sum (x-\mu)^2P(x)}

=\sqrt{0.0676*0.8+0.5476*0.15+3.0276*0.04+7.5076*0.01}\\=\sqrt{0.3324}\\=0.5765

Therefore, the mean and the standard deviation for the number of electrical outages (respectively) are 0.26 and 0.5765 respectively.

3 0
3 years ago
What is the area of the figure in square units?​
igor_vitrenko [27]

Answer:

Area of a Rectangle: l x w

2 x 3 = 6

Area of a Triangle:

\frac{b \times h}{2}

The slanted height of the triangle is 2 and the base of the triangle is also 2 so

\frac{2 \times 2}{2}  \\  \\  \frac{4}{2}  = 2

So to get the area of the figure you add the area of the rectangle plus the area of the triangle.

6+2=8

The area of the figure is 8 units square

5 0
2 years ago
S+2t=6. 3s-2t=2<br> Using elimination
Ludmilka [50]
For the first one, I will solve for t.
s + 2t = 6, first we isolate the t variable,
2t = -s + 6, divide both sides by 2,
t = -s/2 + 3, < There's your answer for 1!

Here's the second one,
3s - 2t = 2, subtract 3s from both sides,
-2t = 2 - 3s, divide both sides by -2,
t = -1 + 3s/2 < There's your second answer!
6 0
3 years ago
Assume that no variable equals 0. <br><br> (a^4)^5
Anton [14]

Answer:

the answer is a^20

Step-by-step explanation:

(a^4)^5

a^4×5

a^20

3 0
3 years ago
Which is the dependent variable in the function  y =1/2 (x2 - 3)  if   y = f(x)?
gizmo_the_mogwai [7]
The answer I see both x and y
6 0
3 years ago
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