exam Maths Puzzle Numerical Ability

Word problem:
There are 60 dimes and quarters in the drawer. Arny counted them and found that their total value was $8.70. How many coins of each type did Arny have?

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Homework question please help; Probability distributions!

The average travel time to work for New York City residents is 36.5 minutes.

a.) Assume the exponential probability
please help me translate into a equation

the perimeter of a rectangle is 600. the length of the rectangle is 2 more than 3 times the width

thank you