What is the equation of a line with a slope of -1/2 that passes through the point (6,-6)

Determine the relationship of ab and cd given the following points

Liz is shipping a package to her friend.the maximum weight of a medium flat-rate box is 20 pounds,including the box which weighs 6 ounces.write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?