\(m^3\) : đo thể tích

ha : đo diện tích

B chắc thế:)

\(\dfrac{1}{5}+\dfrac{2}{5}+\dfrac{3}{5}+\dfrac{4}{5}=\dfrac{10}{5}=2\)

a. 

\(\left(y-24\right):28=20\)

\(\left(y-24\right)=560\)

\(y=584\)

b. \(13\times\left(y-6\right)=4\times y-6\)

\(13\times y-78=4\times y-6\)

\(9\times y=72\)
\(y=8\)
c.\(y\times3+y\times4+y:3+y:4=182\)

\(y\times\left(3+4\right)+y:\left(3+4\right)=182\)

\(y\times\left(7+\dfrac{1}{7}\right)=182\)

\(y=\dfrac{637}{25}\)

I usually eat noodles every morning

\(\dfrac{3}{8}.\dfrac{4}{6}+\dfrac{3}{7}=\dfrac{1}{4}+\dfrac{3}{7}=\dfrac{19}{28}\)

1)\(x\left(x+1\right)=x^2+x\)

2)\(x\left(x-1\right)=x^2-x\)

\(\left(-1\right)^2\left(-2\right)-2\left(-2\right)^2\left(-1\right)=\left(-2\right)-\left(-8\right)=6\)

\(B=4y^2z-4x+5\)