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Levart [38]
3 years ago
7

Ns algebraically. (6 pts)

Mathematics
1 answer:
dlinn [17]3 years ago
8 0

Answer:

2(1.5)+3(0)+4(0)=3

3(-2)+4(-1.75)+2(0)=-13

3+5(2)+3(3)=22

Step-by-step explanation:

You might be interested in
Mrs riddle has $543.73 in her bank account? She writes a check for $840.00. By how much has she overdrawn her account?
Alexxandr [17]

Answer: im only in middle school so this might be wrong but...

-296.27

Step-by-step explanation:

because

3 0
3 years ago
Parts being manufactured at a plant are supposed to weigh 65 grams. Suppose the distribution of weights has a Normal distributio
andrew-mc [135]

Answer:

0.64%.

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Mean of 75 grams and a standard deviation of 22 grams.

This means that \mu = 75, \sigma = 22

Sample of 144:

This means that n = 144, s = \frac{22}{\sqrt{144}} = 1.8333

More than 80 or less than 70:

Both are the same distance from the mean, so we find one probability and multiply by 2.

The probability that it is less than 70 is the pvalue of Z when X = 70. So

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

By the Central Limit Theorem

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

Z = \frac{70 - 75}{1.8333}

Z = -2.73

Z = -2.73 has a pvalue of 0.0032

2*0.0032 = 0.0064.

0.0064*100% = 0.64%

The probability is 0.64%.

3 0
3 years ago
What is they answer on the sheet of paper for my homework
geniusboy [140]
Um not sure but thanks for asking:)
3 0
2 years ago
Miguel lives in a state where sales tax is 4%. This means you can find the total cost of an item, including tax, by using the ex
mr Goodwill [35]
Answer:$29.12

c+0.04c (which can also be written as 1.04c, as they are like terms)

(28)+0.04 x (28)
28 + 1.12
=$29.12
5 0
2 years ago
What's 7/12 minus 3/12 simplified? BTW ONLY IN 4TH GRADE MAKE IT CLEAR
dusya [7]
7/12 - 3/12 = 1/3
Simplify each fraction if possible.
Same denominator? YES!
7 - 3 = 4
Since they have the same denominator, you just subtract the numerators.
Then simplify 4/12
4/4= 1 12/4= 3
Answer: 1/3
Hope that helps!
4 0
2 years ago
Read 2 more answers
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