1. If 13 + x3 + 83 = 93, then x = ?
5. The averages speed of an automobile for the first half of a 100 km. trip was 60 km/hr and from the second half was 90 km/hr. What was the average speed in km/hr for the entire distance?
6. On a certain day, an employee worked from 8:02 a.m. until 4:27 p.m. and took off ¾ hour for lunch. If the employee did not take any other breaks, how many hours did the employee work for?
10. If k is the constant in the expression x2 – x + k and the expression has a value of 0 when 3 is substituted for x, what is the value of the expression when 2 is substituted for x?