Question

пожалуйста помогите!!!!!!!!!

Answer 1

$frac{ {7}^{9} times {7}^{11} }{ {7}^{18} } = frac{ {7}^{20} }{ { {7}^{18} } } = {7}^{2} = 49 \ \ frac{ {5}^{6} times {5}^{3} }{( { {5}^{2} )}^{4} } = frac{ {5}^{9} }{ {5}^{8} } = 5$