# How do you find w(7) given w(a)=-a^2+5a?

$= - 14$
$w \left(a\right) = - {a}^{2} + 5 a$
$w \left(7\right) = - {\left(7\right)}^{2} + 5 \left(7\right)$
$= - 49 + 35$
$= - 14$