Which unit of measure would be appropriate for the valune of a sphere with a radius of 2 meters

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

What are the intercepts of x^2+y-9=0

Julius went on a volunteer trip to centralamerica and took medical supplies with him.he packed a bag with 50 pounds of supplies.he brought pieces of equipment that weighed10 pounds each and bottles of medicine thatweighed pound each prepresents thenumber of pieces of equipment he broughtand b represents the number of bottles ofmedicine he brought then the total weight canbe represented by the equation 10p+b 50.the brought 3 pieces of equipment, how manybottles of medicine did he bring?