Question

What is the missing value?
http://static.k12.com/bank_packages/files/media/mathml_d8c79c9c8eecdf3168f484cd4b893f9b730e11df_1.gif

Is 13 the missing exponent?

Answer 1

Nope. Use this...\[\frac{ a^{m} }{ a^{n} } = a^{m-n}\]

Answer 2

I did use that and got 13 <.>

Answer 3

let x be the unknown value that goes in the blank

then use the rule given above

(exponent numerator) - (exponent denominator) = new exponent

x - (-4) = 9

x + 4 = 9 ... two negatives cancel to make a positive

x = ???

Answer 4

5?

Answer 5

Yes. Correct.

Answer 6

Beware of signs.