How did the balance of power in Europe shift as a result of World War I? A. The Bolshevik Revolution left Russia as the most powerful state in Europe. B. The devastation on the Western Front shifted the balance of power away from France. C. The establishment of the mandate system allowed Middle Eastern states to gain power. D. The fall of eastern empires shifted the balance of power toward western Europe.

2.1 Determine \( \int y d x \) if: 2.1.1 \( y=\frac{\sin ^{2} x}{\cos ^{2} 2 x} \)

Gi \( \begin{array}{l}\text { Un mazzo di chiavi di ferro ha una massa di } 156 \mathrm{~g} \text {. Cade in } \\ \text { un recipiente graduato contenente dell'acqua. } \\ \text { - Di quanto aumenta il volume misurato } \\ \text { dal contenitore? }\end{array} \) a? Spiega

5. El tanque elevado de la IESPU se llena a \( 750 / 3 \) litros por hora, si la capacidad del tanque es 5000 litros ¿El tiempo en horas que tarde en llenarse el tanque es?

c) \( 45+(-19)+10+(-11)= \)

Solve the system of equations using elimination: \( 8 x+3 y=1 \) and \( 6 x+4 y=6 \)