An unknown compound has the following chemical formula: where \( x \) stands for a whole number. Measurements also show that a certain sample of the unknown compound contains 8.2 mol of chlorine and 1.65 mol of phosphorus. Write the complete chemical formula for the unknown compound.

Determine whether the following equation represents \( y \) as a function of \( x \). \[ 8 x+9=y^{6} \]

Question 2 : Dans une classe, \( 40 \% \) des élèves ont choisi l'option mathématiques et \( 60 \% \) ont choisi l'option informatique. Parmi les élèves ayant choisi roption mathématiques, \( 80 \% \) sont satisfaits de leur choix. Parmi les élèves ayant choisi l'option informatique, \( 50 \% \) sont satisfaits. Quelle est la probabilité qu'un élève choisi au hasard soit satisfait de son choix? Nhésitez pas à faire un arbre sur un brouillon pour vous aider \( 0,6,62 \) 0,56

Translate the sentence into an equation, and solve it. If 8 times a number is decreased by 8 , the result is 48 . Find the number. The equation is (Type an equation using \( x \) as the variable.)

4. What type of angles are formed when two lines intersect and share a common 5. In a linear pair, the angles add up to: 6. What is the measure of the supplementary angle of a \( 70^{\circ} \) angle? 7. Convex or Concave: All of its interior angles are less than \( 180^{\circ} \) 8. Convex or Concave: It has at least one interior angle greater than \( 180^{\circ} \)

Use the change-of-base formula and a calculator to evaluate the logarithm. Round your answer to three decimal places. \( \log _{1 / 2} 6 \) \( \log _{1 / 2} 6 \approx \square \) (Do not round until the final answer. Then round to three decimal places as needed.)