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15. Verify experimentally, that the line drawn from the vertex of an isosceles triangle to the midpoint of its base is perpendicular to the base. (Two figures required)
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во: \( x^{2} \log _{16} x \geqslant \log _{16} x^{5}+x \log _{2} x \)
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1. Qual o papel da Bioquímica para os estudos da Ciências 2. Defina o conceito de Proteínas 3. Quais os tipo de de proteínas
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6) Ammoniumnitrat har länge används som sprängämne eftersom det är instabilt och enkelt sōnderfaller till gasformiga âmnen. Den kraftiga expansionen av de gasformiga ämnena kapar den explosiva kraften. Följande reaktion sker: \[ 2 \mathrm{NH}_{4} \mathrm{NO}_{3(s)} \rightarrow 2 \mathrm{~N}_{2(g)}+\mathrm{O}_{2(g)}+4 \mathrm{H}_{2} \mathrm{O}_{(g)} \]
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What is the solution to the equation \( -2.5(x-4)=-3 x+4 \) ? \( \begin{array}{l}x=-28 \\ x=-12 \\ x=12 \\ x=28\end{array} \)
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Задание 8.Кому адресовано посвящение романа "Отцы и дети" И.С. Тургенева а)В.Г. Белинскому б)А.И. Герцену в)Н.Н. Страхову г)М.А. Антоновичу Задание 9.Кто из героев романа И. Тургенева "Отцы и дети» играет на виолончели, читает стихи Пушкина? а) Одинцова б) Павел Кирсанов в) Николай Кирсанов г) Базаров Задание 10. Какой жанр чаще всего звучит в произведении "Кому на Руси жить хорошо"? а)пословица б)сказка в)песня г)загадка
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2) Mendeleev gave the name eka-aluminum to a(an) * \( \square \) mixture of aluminum and an unknown element \( \square \) compound containing aluminum \( \square \) rare isotope of aluminum \( \square \) unknown element he predicted would have properties similar to those of aluminum
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\begin{tabular}{l} Tell whether the fractions are equivalent. \\ \( \begin{array}{llll}\text { 2. } \frac{5}{6}, \frac{15}{18} & \text { 3. } \frac{20}{24}, \frac{5}{8} & \text { 4. } \frac{14}{15}, \frac{21}{24} & \text { 5. } \frac{4}{6}, \frac{8}{12}\end{array} \) \\ \( \begin{array}{llll}\text { 7. Find the Error Describe and } \\ \text { correct the error in simplifying } \frac{24}{42} & \text { 6. } \frac{12}{18}, \frac{8}{32}\end{array} \) \\ Write the fraction in simplest form. \( \frac{24}{42}=\frac{8 \cdot 8^{-1}}{14 \cdot \frac{3}{3}}=\frac{8}{14} \) \\ \( \begin{array}{llll}\text { 8. } \frac{32}{72} & \text { 9. } \frac{6}{21} & \text { 10. } \frac{15}{21} & \text { 11. } \frac{12}{35}\end{array} \) \\ \hline\end{tabular}
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3entuk sederhana dari rasio \( 2,5: \frac{4}{5} \) adalah .... \( \begin{array}{ll}\text { a. } 5: 2 & \text { c. } 25: 8 \\ \text { b. } 2: 5 & \text { d. } 8: 25 \\ \text { Bentuk paling sederhana dari perbandingan } 24 \\ \text { gram terhadap } 1,2 \text { ons adalah .... }\end{array} \)
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h) \( f(x)=(1-\ln x) /(1+\ln x) \)
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