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Zina [86]
3 years ago
5

The number that identifies an atom is the same as the number of: *

Chemistry
1 answer:
seropon [69]3 years ago
3 0

Explanation:

atomic number = proton

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A teacher gives a test to two algebra classes. The first class has 18 students, and the second has 24 students. If the average f
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Answer:

The <em>C)</em> statement is true.

Explanation:

Let's call <em>x_1</em> the average for the first class and <em>x_2 </em>the average for the second class. The overall average <em>x</em> is then:

x=\frac{x_1*18+x_2*24}{18+24}\\x=\frac{84*18+x_2*24}{42}\\x=\frac{1512+x_2*24}{42}

Since the average is given by <em>Average=\frac{Sum of all values}{Amount of values}</em>. We can now calculate <em>x</em> assuming the maximun and minimun values of <em>x_2</em>, 2400 (which is 100 times 24) and 0 respectivly. That gives:

x=\frac{1512+2400}{42}\\x=93

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x=\frac{1512+0}{42}\\x=36

for it's minimun value. So we get that <em>x</em> is between 36% and 93%.

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