a, \(CaCO_3\underrightarrow{t^o}CaO+CO_2\)

b, Theo ĐLBT KL, có: m_CaCO3 = m_CaO + m_CO2 = 560 + 440 = 1000 (g)

ăn dc 0 quả trứng , vì bụng rỗng = ko ăn j mà ko ăn j = chét :))

The police knew the man killed his wife because when they called him to the crime scene, he went straight to the garden without any indication from the police about where the crime had occurred. His knowledge of the specific location of the crime (the garden) before being told by the police served as an indication that he was involved in the murder.

Giải:

Lượng muối có trong mỗi lít nước biển = 1.026Kg x 2,5 % =0.02565kg

Số lít nước biển cần để có 513Kg muối là:

L= 513/ 0.02565 = 20.000 lít

Đáp số: 20.000 lít nước biển

Nestled in the heart of the town lies the bustling marketplace, a vibrant hub teeming with life and activity. Here, locals and visitors alike converge to explore an array of stalls offering fresh produce, colorful handicrafts, and aromatic street food. The lively atmosphere is accentuated by the chatter of vendors and the bustle of shoppers navigating the narrow aisles. With its diverse offerings and lively ambiance, the marketplace stands as a quintessential gathering place, embodying the vibrant spirit of the town.

a: Xét ΔAHB và ΔAHC có

AH chung

HB=HC

AB=AC

Do đó: ΔAHB=ΔAHC

b: ΔAHB=ΔAHC

=>\(\widehat{AHB}=\widehat{AHC}\)

mà \(\widehat{AHB}+\widehat{AHC}=180^0\)

nên \(\widehat{AHB}=\widehat{AHC}=\dfrac{180^0}{2}=90^0\)

=>AH\(\perp\)BC

Xét ΔAEH vuông tại E và ΔAKH vuông tại K có

AH chung

\(\widehat{EAH}=\widehat{KAH}\)(ΔAHB=ΔAHC)

Do đó: ΔAEH=ΔAKH

=>AE=AK

=>ΔAEK cân tại A

c: Xét ΔABC có \(\dfrac{AE}{AB}=\dfrac{AK}{AC}\)

nên EK//BC

e; (1\(\dfrac{1}{3}\) - 25%\(x\) - \(\dfrac{5}{12}\)) - 2\(x\) = 1,6 : \(\dfrac{3}{5}\)

       \(\dfrac{4}{3}\) - 0,25\(x\) - \(\dfrac{5}{12}\) - 2\(x\)   = \(\dfrac{8}{3}\)

       (\(\dfrac{4}{3}\) - \(\dfrac{5}{12}\)) - (0,25\(x\) + 2\(x\)) = \(\dfrac{8}{3}\)

            \(\dfrac{11}{12}\)  - 2,25\(x\) = \(\dfrac{8}{3}\)

                  2,25\(x\)    = \(\dfrac{11}{12}\) - \(\dfrac{8}{3}\)

                 2,25\(x\)     = - \(\dfrac{7}{4}\)

                         \(x\)   = - \(\dfrac{7}{4}\) : 2,25

                         \(x\)  = - \(\dfrac{7}{9}\)

Vậy \(x=-\dfrac{7}{9}\) 

f; \(\dfrac{1}{2}\).(\(x-\dfrac{2}{3}\)) - \(\dfrac{1}{3}\) (2\(x\) - 3) = \(x\)

    \(\dfrac{1}{2}\)\(x\) - \(\dfrac{1}{3}\) - \(\dfrac{2}{3}x\) + 1= \(x\)

    (\(\dfrac{1}{2}\) - \(\dfrac{2}{3}\))\(x\)  + (1 - \(\dfrac{1}{3}\)) = \(x\)

      - \(\dfrac{1}{6}\)\(x\)    +  \(\dfrac{2}{3}\) = \(x\)

       \(x\) + \(\dfrac{1}{6}\)\(x\)      =  \(\dfrac{2}{3}\)

              \(\dfrac{7}{6}\)\(x\)  =  \(\dfrac{2}{3}\)

                 \(x\) =   \(\dfrac{2}{3}\) : \(\dfrac{7}{6}\)

                \(x\) =  \(\dfrac{4}{7}\)

          Vậy \(x\) = \(\dfrac{4}{7}\)

Hoa sings better than anyone else in my family.

dịch câu này đúng không em?

không ai trong gia đình của tôi hát hay hơn Hoa

=>>Hoa hát