Question

What is the missing value?

Answer 1

A.
−13

B.
−5

C.
5

D.
13

Answer 2

http://static.k12.com/bank_packages/files/media/mathml_d8c79c9c8eecdf3168f484cd4b893f9b730e11df_1.gif

Answer 3

A. -13

B. -5

C. 5

D. 13

Answer 4

\(\large {
\cfrac{8^\square }{8^{-4}}=8^9
\\ \quad \\
a^{{\color{red} n}} \implies \cfrac{1}{a^{-\color{red} n}}
\qquad \qquad

\cfrac{1}{a^{-\color{red} n}}\implies \cfrac{1}{\frac{1}{a^{\color{red} n}}}\implies a^{{\color{red} n}} \qquad thus
\\ \quad \\
\cfrac{8^\square }{8^{-{\color{red}{ 4}}}}=8^9\implies 8^\square \cdot 8^{\color{red}{ +4}}=8^9\implies \square =?
}\)

Answer 5

@jdoe0001 So the answer is?

Answer 6

dunno what did you get?

Answer 7

http://www.math-play.com/image-exponents-rules.jpg <--- notice the 1st rule listed there, use that one

Answer 8

Hold on let check

Answer 9

-5?

Answer 10

-5? hmm did you see the 1st rule listed?
\(\bf \cfrac{8^\square }{8^{-{\color{red}{ 4}}}}=8^9\implies 8^\square \cdot 8^{\color{red}{ +4}}=8^9\implies 8^{\square +4}=8^9\implies \square +4=9
\\ \quad \\
\square =?\)