HELP ASAP What is the length of SA? Please show work also!!

Me ! write an equation for the interior angles of this triangle that uses the triangle sum theorem

Lines p and q intersect. find the value of b. show your work. cite any theorems you use.

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?