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3 years ago

The English class has half as many students as the math class

Mathematics

1 answer:

likoan [24]3 years ago

6 0

If you are looking for an equation to solve it, it is E=m/2

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The probabilities that a batch of 4 computers will contain 0, 1, 2, 3, and 4 defective computers are 0.4521, 0.3970, 0.1307, 0.0

kicyunya [14]

Answer:

The standard deviation of given probability distribution is 0.767.

Step-by-step explanation:

We are given the following information in the question:

X: 0 1 2 3 4

P(x): 0.4521 0.3970 0.1307 0.0191 0.0010

Formula:

$\text{Mean} = \sum X.P(x)\\= 0(0.4521) + 1(0.3970) + 2(0.1307) + 3(0.0191) + 4(0.0010)\\= 0.7197$

$\mu = 0.7197$

Formula:

$\text{Variance} = \sum (X-\mu)^2E(x)\\= (0-0.7197)^2(0.4521)+(1-0.7197)^2(0.3970)+(2-0.7197)^2(0.1307)+(3-0.7197)^2(0.0191)+(4-0.7197)^2(0.0010) \\=0.587$

$\text{Standard Deviation} = \sqrt{\text{Variance}}\\= \sqrt{0.587} = 0.767$

The standard deviation of given probability distribution is 0.767.

3 0

4 years ago

The expression √7x is equivalent to the expression x√√7.

wariber [46]

False ………………………………………..

3 0

2 years ago

Read 2 more answers

If anyone could help NOW I would appreciate it

Sveta_85 [38]

3. 5x+2y=-19
10x-7y=-16
10x+4y=-38
10x-7y=-16
11y=-22
Y=-2
10x+4c-2=-38
X=-3

4. 10x-4y=20
2x+7y=43
10x-4y=20
10x+35y=215
-39y=-195
Y=5
10x-4x5=20
X=4

Hope this helped :)

4 0

3 years ago

Tina had $145. She spent $40 on fruit at the famer's market. Solve the equation 40+ c = 145 to find the amount Tina has left

KonstantinChe [14]

I LiEk TeRTlEs PlEs Beh Meh fwend

8 0

3 years ago

Read 2 more answers

Please please help. Marking Brilliant for the correct answer

NISA [10]

Answer:

x = 19

Step-by-step explanation:

(whole secant) x (external part) = (tangent)^2

(x-7+4) * 4 = 8^2

(x-3)*4 = 64

Divide each side by 4

x-3 =16

Add 3 to each side

x-3+3 = 16+3

x = 19

5 0

3 years ago