Question

C=3/7x4/13+3/7x9/13+5va 4/7

Answer 1

Đề bài là gì bạn ơi ??

Answer 2

de bai la tinh

Answer 3

\(C=\frac{3}{7}\times\frac{4}{13}+\frac{3}{7}\times\frac{9}{13}+5\frac{4}{7}\)

\(C=\frac{3}{7}\times\frac{4}{13}+\frac{3}{7}\times\frac{9}{13}+\frac{39}{7}\)

\(C=\frac{3}{7}\times\left(\frac{4}{13}+\frac{9}{13}\right)+\frac{39}{7}\)

\(C=\frac{3}{7}\times1+\frac{39}{7}\)

\(C=\frac{3}{7}+\frac{39}{7}\)

\(C=\frac{42}{7}\)

\(C=6\)

_Chúc bạn học tốt_

Answer 4

\(C=\frac{3}{7}\cdot\frac{4}{13}+\frac{3}{7}\cdot\frac{9}{13}+5\frac{4}{7}\)

\(C=\frac{3}{7}\cdot\frac{4}{13}+\frac{3}{7}\cdot\frac{9}{13}+\frac{39}{7}\)

\(C=\left(\frac{4}{13}+\frac{9}{13}\right)\cdot\frac{3}{7}+\frac{39}{7}\)

\(C=1\cdot\frac{3}{7}+\frac{39}{7}\)

\(C=\frac{3}{7}+\frac{39}{7}\)

\(C=\frac{46}{7}\)

Answer 5

Ta có : 

\(C=\frac{3}{7}.\frac{4}{13}+\frac{3}{7}.\frac{9}{13}+5\frac{4}{7}\)

\(\Rightarrow C=\frac{3}{7}.\left(\frac{4}{13}+\frac{9}{13}\right)+\frac{39}{7}\)

\(\Rightarrow C=\frac{3}{7}.\frac{13}{13}+\frac{39}{7}\)

\(\Rightarrow C=\frac{3}{7}.1+\frac{39}{7}\)

\(\Rightarrow C=\frac{3}{7}+\frac{39}{7}\)

\(\Rightarrow C=\frac{42}{7}\)

\(\Rightarrow C=6\)

Vậy \(C=6\)

~ Ủng hộ nhé