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Vanyuwa [196]
2 years ago
14

How to solve -x^2-2x=5?

Mathematics
1 answer:
anastassius [24]2 years ago
6 0
-x^2 - 2x - 5=0
-(x^2 + 2x + 1) -4=0
(x +1)^2= -4
=> Impossible. There is no x
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The heights of adult males in the United States are approximately normally distributed. The mean height is 70 inches (5 feet 10
steposvetlana [31]

Using the normal distribution, it is found that the probability is 0.16.

<h3>Normal Probability Distribution</h3>

In a normal distribution with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

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

  • It 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, which is the percentile of X.

In this problem, the mean and the standard deviation are given by, respectively, \mu = 70, \sigma = 3.

The proportion of students between 45 and 67 inches is the p-value of Z when <u>X = 67 subtracted by the p-value of Z when X = 45</u>, hence:

X = 67:

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

Z = \frac{67 - 70}{3}

Z = -1

Z = -1 has a p-value of 0.16.

X = 45:

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

Z = \frac{45 - 70}{3}

Z = -8.3

Z = -8.3 has a p-value of 0.

0.16 - 0 = 0.16

The probability is 0.16.

More can be learned about the normal distribution at brainly.com/question/24663213

3 0
2 years ago
Calculate dy/dx if Ln (x + y) = e^x/y<br> Pic included
vesna_86 [32]
The first thing you should do when dealing with implicit derivatives is to respect the rules of derivation of both the logarithm and the exponential
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3 years ago
Tony purchases a house for $135.000. The value
m_a_m_a [10]

d

Step-by-step explanation:

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2 years ago
Ms Baker paid 2.50 for 5 lb of bananas write an equation relating the cost c to the number of pounds p of bananas how much would
vfiekz [6]
Mrs. Baker would of paid
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What is the sum of each pair of hexadecimal integers?<br> a. 6b4 + 3fe<br> b. A49 + 6bd?
Korolek [52]

Answer:

a)   AB2

b)   1106

Explanation:

Hex addition can be achieved through repeated subtraction of 16 from the decimal sum of same place values of hex numbers until the result is reached to one of the hex digits from 0 to F. The carry increases by 1 where each time the number 16 is subtracted from the hex numbers decimal sum. The below example lets you understand how to perform hex numbers addition

(a)   6B4 + 3FE

                   6 B 4

               +  3 F E

-------------------------------------------------

                  A B 2      


(b)        A 4 9

       +  6 B D

---------------------------

         1 1 0 6

6 0
3 years ago
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