Six times the reciprocal of a number equals 3 times the reciprocal of 8

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

News cameras take an overhead picture of a crowd at an outdoor event journalist then count the total number of people in the picture and use the sample of estimate the total number of people in the crowd this process is an example of

Solve the given system of equations. 2y= -x+9 , 3x-6= -15