Jerome burns 4 cal/min walking and 10 cal/min running. he walks

between 10 and 20 min each day and runs between 30 and 45 min each

day. he never spends more than an hour running and walking together.

"low much time should he spend on each activity to maximize his

alorie-burning?

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.

Due to a packaging error, 4 cans labeled diet soda were accidentally filled with regular soda and placed in a 12 pack carton of diet soda. two cans were randomly selected from this 12 pack. what is the probability that both cans were regular soda?