Please help me i dont understand

What is the measure of ac? 5 units 13 units 26 units 39 units

Find the required measurements of the following trapezoids. a = 8 cm b = 16 cm h = 10 cm

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