Centerville has a population of 18,000. People under the age of 18 make up 23% of the town's population. How
many people under the age of 18 live in Centerville??

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

Need ! give step by step solutions on how to solve number one [tex]\frac{9-2\sqrt{3} }{12+\sqrt{3} }[/tex] number two [tex]x+4=\sqrt{13x-20}[/tex] number three (domain and range) [tex]f(x)=2\sqrt[3]{x} +1[/tex]

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.