Bill and amy want to ride their bikes from their neighborhood to school which is 14.4 kilometers away. it takes amy 40 minutes to arrive at school. bill arrives 20 mins after amy. how much faster in meters per second is amys average speed for the entire trip?

Pls me this is due today and i need i will make brainliest if you me answer correctly and i will report if you try to give me a dumb answer.

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?