Sixty-four students voted for Morgan. Two times as many students voted for Whitney. How many students voted aitogether?

Veriflez que la relation : \( \frac{1}{1+(t a n c)^{2}}=(\cos c)^{2} \) est vraie pour l'angle \( c \) de mesure \( 60^{\circ} \) a partir des valeurs de cos \( 60^{\circ} \) et tan \( 60^{\circ} \) détermines ci-dessus. Demontrez que la relation est vraie pour tout angle aigu de mesure c.

Bestimmen Sie, wie viele Atome (Angabe ohne "mol") es in folgenden Mengen hat: \( 3 \mathrm{~mol} \mathrm{H}_{2} \mathrm{O} \) : \( 10^{24} \) 2.5 mol Traubenzucker \( \left(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\right) \) :

Find the missing side of the triangle. The perimeter of the triangle is \( 12 x^{2}-7 x+1 \). \( 4 x^{2}-2 x+1 \) \( 8.4 x^{2}+x+21 \)

QUESTION 1 \( 1.1 \quad \) Solve for \( x \) : \( 1.1 .1 \quad 3 x^{2}+5 x=0 \)

Simplify the following expression fully \( \frac{5 x^{2}+14 x-3}{x^{2}-9} \)