#### Answer

$3x^2$ has degree $2$; $5x$ has degree $1$; $-7$ has degree $0$; the polynomial has degree $2$.

#### Work Step by Step

The polynomial's degree is the same as the largest degree from any of the terms.
$3x^2+5x-7$
$3x^2$ has degree $2$; $5x$ has degree $1$; $-7$ has degree $0$; the polynomial has degree $2$.