Use a tree to test whether the following argument is valid or invalid. if it is invalid, read off a counterexample. 1. d + (a b) 2. b (cvd) .. (dvb)

Acar travels at an average speed of 52 miles per hour. how long does it take to travel 299 miles

Josh has a rewards card for a movie theater he receives 15 points for becoming a rewards card holder he earns 3.5 points for each visit to the movie theater he needs at least 55 points to earn a free movie ticket which inequality can josh use to determine x, the minimum number of visits he needs to earn his first free movie ticket.

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?