Questions in mathematics

Questions in mathematics

[Done] George has a small coin collection. He has collected: - 16 gold coins - 28 silver coins - 32 copper coins - 4 bronze coins At a flea market, George sells 15% of his coins. Find the number of coins he sold.

[Done] A gasoline pump delivers [tex]4 \frac{2}{5}[/tex] gallons of gas per minute. How many minutes will it take to fill a gas tank that holds [tex]16 \frac{1}{2}[/tex] gallons?

[Done] How many minutes is it before 12 noon if 20 minutes ago it was three times as many minutes after 9 a.m.?

[Done] A swimming pool is 20 meters long and 12 meters wide. The bottom of the pool is slanted so that the water depth is 1.3 meters at the shallow end and 4 meters deep at the deep end. Find the angle of depression of the bottom of the pool.

[Done] Rewrite the expression without using a negative exponent: \[ 6m^{-2} \]

[Done] Maria exercises for \(2 \frac{1}{7}\) hours every Saturday. She runs for \(\frac{1}{3}\) of the time that she exercises. How much time does she spend running every Saturday?

[Done] What percent of 126 is 22?

[Done] If \( A + B = 76 \) and \( A - B = 38 \), what is \( A \) divided by \( B \)?

[Done] What is a unit of area with dimensions \(1 \text{ unit} \times 1 \text{ unit}\)?

[Done] If \((x - 2)^2 = 49\), then \(x\) could be?