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3 years ago

-a2 - 2bc -lcl if a = -3, h = -5, and c = 2

Mathematics

1 answer:

kaheart [24]3 years ago

7 0

Answer:

plss mark me brainliesttt

Step-by-step explanation:

6+20-2

26-2

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A factory makes car batteries. The probability that a battery is defective is 1/14. If 400 batteries are tested, about how many

Rufina [12.5K]

Answer:

28.6, that is, about 29 are expected to be defective

Step-by-step explanation:

For each battery, there are only two possible outcomes. Either it is defective, or it is not. The probability of a battery being defective is independent of other betteries. So the binomial probability distribution is used to solve this question.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

The expected value of the binomial distribution is:

$E(X) = np$

The probability that a battery is defective is 1/14.

This means that $p = \frac{1}{14}$

400 batteries.

This means that $n = 400$

How many are expected to be defective?

$E(X) = np = 400*\frac{1}{14} = 28.6$

28.6, that is, about 29 are expected to be defective

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3 years ago

I don’t know what to do

solong [7]

Answer:

Step-by-step explanation:

slope is what is infront of x and y intercept is the number after the slope

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3 years ago

Read 2 more answers

Marcus scored 2.5 loints per game in the 20 basketball games he played last year.how many total points did Marcus score in these

Dovator [93]

Marcus scores 50 total points.

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3 years ago

A new online music service has a collection of 1,500 songs. It expects to triple the number of songs each year for the next few

Rzqust [24]

Answer: y = (3^(x-1))*1500

Step-by-step explanation:

We want the relationship

y = f(x)

where y is the number of songs, and x is the number of years.

We know that in the first year, x = 1, the site has 1,500 songs.

The next year, x = 2, the number of songs is tripled, then we will have:

1,500*3 = 4500 songs.

The next year, x = 3, we will have: 3*(3*1500) = (3^2)*1500.

when x = 4, the number is tripled again:

3*(3^2)*1500 = (3^3)*1500

We already can see the pattern, for the year x, the site will have:

y = (3^(x-1))*1500 songs.

This is the equation we are looking for.

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3 years ago

Distance between (-3, 4/11) and (3, 4/11)

ELEN [110]

Answer:

Step-by-step explanation:

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3 years ago