Ben bought a movie ticket for $37.50. He got $12.50 for change. How much was the ticket?

Which of the following answers is 7/9 simplified? 7/9 2/9 11/9 2/7

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.

Arectangle has a width of 5 cm and a length of 10 cm. if the width is increased by 3, how does the perimeter change?