Chris is five times as old as zac. in thirty years chris will be twice zac's age. how old is zac now?

Are the corresponding angles congruent? explain why or why not.

There are 93 calories in a small candy bar how many calories are ther in a half dozen small candy bars?

The bottom of ignacio's desktop is 74.5cm from the floor. ignacios sits in his adjustable chair, and the tops of his legs are 49.3cm from the floor. each clockwise rotation of the knob on the chair raises ignacio's legs by 4.8cm. write an inequality to determine the number of clockwise rotations, r, ignacio could make with the knob without his legs touching the desk.