Can someone explain to me how to solve problem 32?

Mathematics

1 answer:

krok68 [10]3 years ago

5 0

Ok so parallel equations mean they have equal slope, but different y intercepts. Here, we can solve and get the equation:

y=2/5x-7/5

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Find the slope of the line

vichka [17]

Answer:

4/5

Step-by-step explanation:

y2-y1/x2-x1. (5,3), (0,-1).

-1-3/0-5.

-4/-5

4/5

Therefore, slope=4/5

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8 0

3 years ago

Read 2 more answers

The mean life of a particular brand of light bulb is 1200 hours. If you know that at about 95% of this brand of bulbs will last

Pachacha [2.7K]

Answer:

c) 50

Step-by-step explanation:

We have been given that the mean life of a particular brand of light bulb is 1200 hours. About 95% of this brand of bulbs will last between 1100 and 1300 hours.

We will use z-score formula to solve our given problem.

$z=\frac{x-\mu}{\sigma}$ , where,

$z=\text{z-score}$ ,

$x=\text{Sample score}$ ,

$\mu=\text{Mean}$ ,

$\sigma=\text{Standard deviation}$

We know that 95% of data points lies within two standard deviation of mean, so 1100 will correspond to a z-score of -2 and 1300 will correspond to a z-score of 2.

$-2=\frac{1000-1200}{\sigma}$