True or false

surface area is the sum of all the areas of every surface on a geometric figure

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?

If 3x+8=3x+8 is it one solution or no solution

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air