SOLUTION: determine whether the pair of fractions are proportional. 7/9 = 21/27? evaluate the expression then simplify. this is a fraction . 12divided by(3).(-8) (3 to 2ndpower + 1

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Question 153658: determine whether the pair of fractions are proportional.
7/9 = 21/27?

evaluate the expression then simplify. this is a fraction .
12divided by(3).(-8)
(3 to 2ndpower + 1 to 2nd power)+2
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
To determine proportionality, cross multiply.
If the products are equal, the fractions are proportional.
7%2F9+=+21%2F27
7%2827%29=9%2821%29
189=189
Yes, they are proportional.
%287%2F9%29%283%2F3%29=21%2F27
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.
.
12%2F%283%2A%28-8%29%29=12%2F%28-24%29=-%281%2F2%29
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.
.
Remember the order of operations: parentheses, powers, then addition.
%283%5E2%2B1%5E2%29%2B2=%289%2B1%29%2B2
%283%5E2%2B1%5E2%29%2B2=%2810%29%2B2
%283%5E2%2B1%5E2%29%2B2=12