Determine whether 49x^2 − 25 is a difference of two squares. if so, factor it. if not, explain why. a. (7x + 5)(7x + 5) b. (7x + 5)(7x − 5) c. (7x − 5)(7x − 5) d. not a difference of squares because −25 is not a perfect square.

Combined megan and kelly worked 60 hours.kelly worked twice as many hours as megan.how many hours did they each worked?

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.

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.