Question

помоооогииите пожалуйста даю максимально баллов !!!!!!!!!!!!!!!!

Answer 1

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 2

$1)\frac{d^{2}+cd} {5c}* \frac{30c}{c+d}= \frac{d(c+d)}{5c}* \frac{30c}{c+d}=6d\\\\6*1,8=10,8\\\\2)\frac{5+2b}{ab}: \frac{5+2b}{a^{2}} = \frac{5+2b}{ab}*\frac{a^{2}} {5+2b}= \frac{a}{b}\\\\\frac{a}{b}= \frac{8,7}{3}=2,9\\\\3)\frac{6+3n}{mn}: \frac{6+3n}{m^{2}}= \frac{6+3n}{mn}* \frac{m^{2}} {6+3n}= \frac{m}{n}\\\\\frac{m}{n}= \frac{7}{7}=1$