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3 years ago

14

Now solve the equation 4(x+3)=8. Remember to: Build the equation on your Equation Mat with algebra tiles. Simplify the equation

using your legal moves. Record your work on your paper. Solve for x . That is, find the value of x that makes the equation true.

1 answer:

Ymorist [56]3 years ago

3 0

Answer:

x=-1

Step-by-step explanation:

4(x+3)=8

4x+12=8

4x=-4

x=-1

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The expected (mean) life of a particular type of light bulb is 1,000 hours with a standard deviation of 50 hours. The life of th

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Answer:

Option B) 0.0013

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 1000 hours

Standard Deviation, σ = 50 hours

We are given that the distribution of life of bulb is a bell shaped distribution that is a normal distribution.

Formula:

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

P(bulb would last longer than 1150 hours)

$P( x > 1150) = P( z > \displaystyle\frac{1150 - 1000}{50}) = P(z > 3)$

$= 1 - P(z \leq 3)$

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

$P(x > 1150) = 1 - 0.9987 = 0.0013$

0.0013 is the probability that a randomly selected bulb would last longer than 1150 hours.

Thus, the correct answer is

Option B) 0.0013

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3 years ago

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Kamila [148]

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3 years ago

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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

Take the missing number as x,

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