Calculation: One score is 20. Two score is 40. Three score and 5 is 65. How many is four score and 7?

Which system of linear inequalities is represented by the graph? !

Three friends went on a road trip from phoenix, az, to san diego, ca. mark drove 50 percent of the distance. jason drove 1/8 of the distance. andy drove the remainder of the distance. 1. andy thinks he drove 1/4 of the distance from phoenix, az, to san diego, ca. is andy correct? 2. the distance from phoenix, az, to san diego, ca, is 360 miles. how many miles did each person drive? 3. solve the problem. what is the answer in total?

What percent of 18 is 24? and plz explain thx.