If a car travels 640 miles in 11 hours, what is the average rate (speed) of the car? a) 0.017 mph b) 17.12 mph c) 58.18 mph d) 62.9 mph

36 inches/second = yards/minute how many yards?

Student price tickets to a movie are $1 and non student tickets are $2. 350 tickets are sold and the total amount made is $450. how many non student tickets were sold ? a) 100 b) 150 c) 200 d)250

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.