SOLUTION: Transforming Formulas page 166, number 25 solve the given formula for the variable shown. state the restrictions, if any, for the formula obtained to be meaningful. a=180(n-

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Question 106723This question is from textbook Algebra, structure and meathod, book 1
: Transforming Formulas
page 166, number 25
solve the given formula for the variable shown. state the restrictions, if any, for the formula obtained to be meaningful.
a=180(n-2)all over n; solve for n
the answer is;
n=360 all over 180-a; a does not = 0 This question is from textbook Algebra, structure and meathod, book 1

Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Your answer is correct but the restriction on a doesn't make sense.
In the formula: n+=+360%2F%28180-a%29, if a were zero, you still have a valid formula of n+=+360%2F180 or n+=+2
What you really should be concerned with in a formula that has a denominator is, what would make the denominator equal to zero. And the answer here is a = 180.
If a were equal to 180, then you would have: n+=+360%2F%28180-180%29 or n+=+360%2F0 and, as you know, division by zero is not defined.
So the restriction is: a cannot equal 180