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zhannawk [14.2K]
2 years ago
6

What is the reason for each step in the solution of the equation?

Mathematics
1 answer:
iVinArrow [24]2 years ago
4 0
4x-1=-2(x+1)
Distribute
4x-1=-2x-2
Move variable to left and change signs
4x+2x=-2+1
Combine like terms
6x=-1
Divide both sides by 6
X=-1/6
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You have just used the network planning model and found the critical path length is 30 days and the variance of the critical pat
joja [24]

Answer:

0.726 is the probability that the project will be completed in 33 days or less.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 30 days

Variance = 25 days

Standard Deviation,

\sigma = \sqrt{\text{Variance}} = \sqrt{25} = 5

We assume that the distribution of path length is a bell shaped distribution that is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

P(completed in 33 days or less)

P( x \leq 33) = P( z \leq \displaystyle\frac{33 - 30}{5}) = P(z \leq 0.6)

Calculation the value from standard normal z table, we have,  

P(x \leq 33) = 0.726 = 72.6\%

0.726 is the probability that the project will be completed in 33 days or less.

8 0
3 years ago
If two sides of a triangle are 9cm and 15cm in length, which COULD be the measure of the third side?
MArishka [77]
The lemght could be 15 because a triangle has two long sides and one short one and the two are equivalent
5 0
3 years ago
An angle that measures between 90 and 180 is called?
Law Incorporation [45]
It's called an obtuse angle.
5 0
3 years ago
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A pound is equal to 0.454 kilograms, how many kilograms does a 142-pound man weigh
levacccp [35]

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Step-by-step explanation:

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2 years ago
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Write two different equations to describe each situation. a) You buy 3 identical shirts and 2 identical pairs of socks and spend
Ronch [10]

Answer:

3x + 2y = 38,  3a + 2b = 38

Step-by-step explanation:

An equation may be defined as a statement that shows two mathematical expressions to be equal. It is to equate one thing to another thing.

In the context, two different equations for the situations are :

i). Let the shirt be represented by x

   And the socks be represented by y

Therefore, according to the question,

   3x + 2y = 38

ii). Let the shirt be represented by a

   And the socks be represented by b

Therefore, according to the question,

   3a + 2b = 38

7 0
3 years ago
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