45 On sait que \( 112=14 \times 8 \). Sans calcul, expliquer pourquoi 112 est divisible par: \( \begin{array}{llll}\text { a. } 8 & \text { b. } 7 & \text { c. } 4 & \text { d. } 16\end{array} \)

solve \( 3^{2}-81 \)

\( 10 \times \frac{3}{4}=10 \times \frac{3}{7} \div \frac{1}{4}=30 \div 1 \) \( 10 \times \frac{3}{4}=10 \div \frac{4}{3} \times 3= \) Why are these equivalent?

A jewelry store had sales of \( \$ 16,532 \) during the first week of the month, \( \$ 14,579 \) during the second week, \( \$ 18,406 \) during the third week, and \( \$ 27,966 \) during the fourth week. What is the difference in sales between the first two weeks and the last two weeks? The store had \( \$ 15,261 \) more sales during the last two weeks. The store had \( \$ 7,607 \) more sales during the last two weeks. The store had \( \$ 15,261 \) more sales during the first two weeks. The store had \( \$ 7,607 \) more sales during the first two weeks.

Perform the indicated operation and simplify the result. \( \frac{7}{3} \cdot \frac{15}{49} \) \( \frac{7}{3} \cdot \frac{15}{49}=\square \) (Type a simplified fraction.)

A paim-wine lapper rode a bicycle for \( 1 \frac{2}{5} \) hours on Monday and \( 2 \frac{2}{3} \) hours Tuesday. How long did he ride the bike for the two days?