if 6 racquets and 4 balls weigh 5.2 kg, and 4
weigh 4.8 kg, then how much does one ball weigh?

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?