Donnie's dad is 3 times older than donnie, and the sum of their ages is no less than 56. what is the youngest that donnie can be?

Rai compares two cable plans from different companies. which equation gives the correct value of mm, the number of months for which plans a and b cost the same?

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.

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi