Can anyone figure this out?

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian 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? i need this done

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9