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Novay_Z [31]
3 years ago
11

0.24a + 0.5 = 4.5 What does the variable equal

Mathematics
2 answers:
Advocard [28]3 years ago
8 0

Answer:

Step-by-step explanation:

6.08108108108

GREYUIT [131]3 years ago
4 0

Answer:

16.66

Step-by-step explanation:

1) eliminate constant first by performing the opposite operation:

0.24a+0.5-0.5=4.5-0.5

0.24a=4.0

divide both sides by 0.24

a=16.66

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From a group of 3 men and 4 women, a delegation of 2 is selected. What is the expected number of men in the delegation?
Ostrovityanka [42]

Answer:

The expected number of men in the delegation is 0.86.

Step-by-step explanation:

Number of men = 3

Number of women = 4

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Let X be the number of men selected. So, the possible values of X are 0,1,2.

P(X=0)=\dfrac{^3C_0\times ^4C_2}{^7C_2}=\dfrac{2}{7}

P(X=1)=\dfrac{^3C_1\times ^4C_1}{^7C_2}=\dfrac{4}{7}

P(X=2)=\dfrac{^3C_2\times ^4C_0}{^7C_2}=\dfrac{1}{7}

The expected number of men in the delegation is

E(x)=0\times P(X=0)+1\times P(X=1)+2\times P(X=2)

E(x)=0\times \dfrac{2}{7}+1\times \dfrac{4}{7}+2\times \dfrac{1}{7}

E(x)=\dfrac{6}{7}

E(x)\approx 0.86

Therefore, the expected number of men in the delegation is 0.86.

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2 years ago
A paved path is 162 feet long, 12 feet wide, and 4 inches deep. How many cubic feet of concrete will be required for the path?
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3 years ago
How to find this answer using sine or cosine law?
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