Question

Question?
http://prntscr.com/2augbh

Answer 1

\[\Large\begin{array}{rcl}
\frac{3\sqrt7}{a\sqrt7}&=&\frac{3\sqrt7}7\\
7&=&a\sqrt7\\
a&=&\frac7{\sqrt7}=\frac{\sqrt7\times\sqrt7}{\sqrt7}=\sqrt7
\end{array}\]

Answer 2

a.sqrt7 would have to equal 7

Answer 3

so you cancelled 3 sqrt 7

Answer 4

I divided both sides by \(3\sqrt7\) and multiplied \(7a\sqrt7\) to both sides in one step

Answer 5

Question?
http://prntscr.com/2aupyj

Answer 6

\[\Large A=P(1+R)^n=$10000(1+4\%)^5\approx$12167\]