Question

C= \(\frac{-5}{7}\). \(\frac{2}{11}\)+ \(\frac{-5}{7}\). \(\frac{9}{11}\)+ 1\(\frac{5}{7}\)

Answer 1

Giai ho minh cau hoi nay nhe

 

Answer 2

C=5/7.(2/11+9/11)+1.5/7

C=5/7.1+12/7

C=5/7+12/7

C=17/7

Answer 3

\(C=\frac{-5}{7}.\frac{2}{11}+\frac{-5}{7}.\frac{9}{11}+1\frac{5}{7}\)

\(C=\frac{-5}{7}.\left(\frac{2}{11}+\frac{9}{11}\right)+\frac{12}{7}\)

\(C=\frac{-5}{7}.\frac{11}{11}+\frac{12}{7}=\frac{-5}{7}.1+\frac{12}{7}=\frac{-5}{7}+\frac{12}{7}=\frac{7}{7}=1\)

Vậy C=11

Answer 4

nhầm,dòng cuối là C=1 nhé