The perimeter of parallelogram abcd is 84 cm. ad is 12 cm more than twice ab. find the lengths of all four sides of abcd.

Asoccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.1 in

You and a friend race across a field to a fence and back. your friend has a 50-meter head start. the equations shown represent you and your friend's distances dd (in meters) from the fence tt seconds after the race begins. find the time at which you catch up to your friend. you: d=∣−5t+100∣d=∣−5t+100∣ your friend: d=∣−313t+50∣∣

Which term best describes the association between variables a and b