amiechap12
13.06.2020 •
Mathematics
(01.05)
Which of the following is the most appropriate unit to describe the rate at which a person reads? (2 points)
A) Minutes per word, because the independent quantity is the minutes
B) Minutes per word, because the independent quantity is the words
C) Words per minute, because the independent quantity is the minutes
D) Words per minute, because the independent quantity is the words
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Ответ:
25(a-2)(a+2)
Step-by-step explanation:
25a^2 -100
We can factor out 25
25(a^2 -4)
a^2 -4 is the difference of squares a^2-b^2= (a-b)(a+b)
where a =a and b=2
a^2 -4 = (a-2)(a+2)
25a^2 -100 = 25(a-2)(a+2)