Richard and carlin are brothers. carlin is one year older that three timers richards age. carlin is 19 how old is richard?

Horace's speedometer reads 60 miles per hour, but during a road test he finds that he was actually driving 58 mph. what is the percent error in horaces speedometer?

He concluded that a heavier object dropped from the same height as a lighter object will land

Simplify the expression 10/11(22z) + (a+5) -1