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shtirl [24]
3 years ago
13

(-7) • (-5) what does it equal to

Mathematics
2 answers:
stepan [7]3 years ago
5 0

Answer:

35

Step-by-step explanation:

  1. Negative × negative = Positive
  2. -7 × -5 = 35

I hope this helps!

bixtya [17]3 years ago
5 0

Answer:

35

Step-by-step explanation:

Simplify

(-7) X (-5)

Negatives cancel out so its going to be positive

That's how you get 35.

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. Exam scores for a large introductory statistics class follow an approximate normal distribution with an average score of 56 an
Andru [333]

Answer:

0.1% probability that the average score of a random sample of 20 students exceeds 59.5.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, a large sample size can be approximated to a normal distribution with mean \mu and standard deviation \frac{\sigma}{\sqrt{n}}

Normal probability distribution

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 56, \sigma = 5, n = 20, s = \frac{5}{\sqrt{20}} = 1.12

What is the probability that the average score of a random sample of 20 students exceeds 59.5?

This is 1 subtracted by the pvalue of Z when X = 59.5. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{59.5 - 56}{1.12}

Z = 3.1

Z = 3.1 has a pvalue of 0.9990.

So there is a 1-0.9990 = 0.001 = 0.1% probability that the average score of a random sample of 20 students exceeds 59.5.

3 0
3 years ago
This Spring, Daisy wanted to
meriva
5•6 = 30.

She needs to buy 30 flowers from the store.
8 0
3 years ago
Read 2 more answers
Which diagram could be used to prove<br> ABC - ADEC using similarity transformations?
Simora [160]

Answer:

the answer is C

Step-by-step explanation:

8 0
3 years ago
Lenny has a remaining balance on his credit card of $800. His credit card has an APR of 22 percent. How much will he pay in inte
olasank [31]

Answer:

22

Step-by-step explanation:

5 0
2 years ago
Determine whether each relationship is a function. State the domain and range of each relation.
atroni [7]
<h2>Hello!</h2>

The answer is:

The relation is a function

Domain: {-5,-3,1}

Range:  {6,3}

<h2>Why?</h2>

It's a function since each input (domain) has only one value at the output (range). A function exists when there is only a single value for each input, if there is more than one output for each input, the relation is not a function.

Have a nice day!

3 0
3 years ago
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