Problem page the sum of two numbers is 67 and the difference is 11 . what are the numbers?

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.