Simplify each of the following expressions without using a calculator. Leave answers in exact form.
$\log4+\log9$log4+log9
$\log_{10}\left(10\right)+\log_{10}\left(10\right)$log10(10)+log10(10)
Simplify each of the following expressions without using a calculator. Leave answers in exact form.
Express $\log10x+\log10y$log10x+log10y in simplest form.
Express $\log\left(\frac{pq}{r}\right)$log(pqr) as the sum and difference of log terms.