2 years ago

a student took a test that had 60 questions.if he got 45 right,what percentage of the question did he get right?

Mathematics

1 answer:

Sergeeva-Olga [200]2 years ago

5 0

Answer:

25 %

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2^x+5 = 3^1-x use logarithms to solve the exponential equation. round answer to 3 decimal places.

marysya [2.9K]

$2^{x+5}=3^{1-x}\ \ \ \ \ /log_2()\\\\log_22^{x+5}=log_23^{1-x}\\\\x+5=(1-x)log_23\\\\x+5=log_23-xlog_23\\\\x+xlog_23=log_23-5\\\\x(1+log_23)=log_23-5\ \ \ \ /:(1+log_23)$

$x=\frac{log_23-5}{1+log_23}\\-------------\\log_23\approx1.5849625\\----------------\\x\approx\frac{1.5849625-5}{1+1.5849625}\approx-1.321$

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3 years ago

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Sindrei [870]

The answer is 10,167

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3 years ago

Which mathematical symbol would best fill in the blank to compare the two real numbers?√7_14/5

miss Akunina [59]

Answer:

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