What is the number pattern from 10 to 30 to 90 to ? and ? to ?

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

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.

Answer each of the questions for the following diagram: 1. what type of angles are these? 2. solve for x. what does x equal? 3. what is the measure of the angles?