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ICE Princess25 [194]
2 years ago
15

Match the simplified version of the number given. Note: You do not need to find the opposite for the number, just the simplified

number. Use the following clues:
The opposite of a positive number is a negative number and vice versa.
The opposite of the opposite of a positive number is a positive number.
The opposite of the opposite of a negative number is a negative number.
1. -(-75)
-20
2. -(87)
-75
3. -(20)
75
4. -(-20)
-12
5. -(12)
12
6. -(-12)
20
7. -(75)
-87
8. -(-(87)
87
Mathematics
1 answer:
mart [117]2 years ago
8 0

The matching forms of the numbers are as represented below upon evaluation;

  1. -(-75) = 75
  2. -(87) = -87
  3. -(20) = -20
  4. -(-20) = 20
  5. -(12) = -12
  6. -(-12) = 12
  7. -(75) = -75
  8. -(-87) = 87

<h3>Opening up parenthesis</h3>

The given numbers can be simplified by opening up the parenthesis as indicated above in which case,

  • The product of 2 negatives equals a positive sign

  • The product of ,a negative and positive equals negative.

Read more on parenthesis;

brainly.com/question/25935638

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Answer:

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2 years ago
14. The sum of two consecutive numbers is 73. What are the numbers?
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Consecutive numbers can be written as such:
n + (n + 1) = 73

Open the parentheses and simplify:
2n + 1 = 73

Subtract 1 from both sides:
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According to the National Vital Statistics, full-term babies' birth weights are Normally distributed with a mean of 7.5 pounds a
Sav [38]

Answer:

68.26% probability that a randomly selected full-term pregnancy baby's birth weight is between 6.4 and 8.6 pounds

Step-by-step explanation:

Problems of normally distributed samples are 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 = 7.5, \sigma = 1.1

What is the probability that a randomly selected full-term pregnancy baby's birth weight is between 6.4 and 8.6 pounds

This is the pvalue of Z when X = 8.6 subtracted by the pvalue of Z when X = 6.4. So

X = 8.6

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

Z = \frac{8.6 - 7.5}{1.1}

Z = 1

Z = 1 has a pvalue of 0.8413

X = 6.4

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

Z = \frac{6.4 - 7.5}{1.1}

Z = -1

Z = -1 has a pvalue of 0.1587

0.8413 - 0.1587 = 0.6826

68.26% probability that a randomly selected full-term pregnancy baby's birth weight is between 6.4 and 8.6 pounds

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3 years ago
You paint 1/2 wall in 1/4hour At that rate how long will it take you to paint one wall
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Answer:

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