Will give brainliest to correct answer​

Which expression calculates the speed in meters per second of an object that travels a distance of 100 m every 20 seconds

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.

If a || b and e || f , what if the value of y ?