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3 years ago

Solve for . 3 = 8x - 5 (3x + 5)

Mathematics

1 answer:

Elis [28]3 years ago

6 0

Answer:

x= -4

Step-by-step explanation:

3=8x-5(3x+5)

distribute

3=8x-15x-25

combime like factors

28= -7x

divide 28/ -7

x= -4

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The lifetime of a certain type of battery is normally distributed with mean value 15 hours and standard deviation 1 hour. There

KIM [24]

Answer:

If the lifetime of batteries in the packet is 40.83 hours or more then, it exceeds for 5% of all packages.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 15

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Sample size = 4

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

Formula:

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

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Solve for . 3 = 8x - 5 (3x + 5)​

Solve for . 3 = 8x - 5 (3x + 5)