\( (a x+b x)+(a y+b y) \) Determina el factor común entre los términos de cada grupo y factoriza los binomios. Primera factorización: \( x(a+b)+y(a+b) \)

A certain molecular compound \( M \) has a solubility in acetonitrile of \( 0.415 \frac{\mathrm{~g}}{\mathrm{~mL}} \) at \( 10 .{ }^{\circ} \mathrm{C} \). Calculate the greatest mass of \( M \) that could be dissolved in \( 700 . \mathrm{mL} \) of acetonitrile at this temperature. You may assume the volume of the solution doesn't change as the \( M \) is dissolved. Be sure your answer has the correct unit symbol and 3 significant digits.

SE DESCARGARON \( \frac{5}{12} \) DE VIDEOS MUSICALES. UNA PARTE SE DESCARGÓ AFER \& \( \frac{36}{12} \) ESTA MANANA. ZQUE ARTE DE LOS VIDEOS SE DESCARGARON AFER?

A chemist prepares a solution of nickel(II) chloride \( \left(\mathrm{NiCl}_{2}\right) \) by weighing out 75.3 mg of nickel(II) chloride into a 450 , mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in \( \mathrm{g} / \mathrm{dL} \) of the chemist's nickel(II) chloride solution. Round your answer to 3 significant digits.

Sketch \( \theta=\frac{7 \pi}{6} \) in standard position. Th

Write down (i) the factors of \( x^{2}-4 \), (ii) the factors of \( x^{2}+4 x+4 \), (iii) the L.C.M. of \( x^{2}-4 \) and \( x^{2}+4 x+4 \).