Find the first 5 terms of the sequence: an = 4n-1.

Cassius drives at 9 miles per hour upstream, and 6 miles per hour downstream.

Step-by-step explanation:

1. Let's review the information provided to us to answer the question correctly:

Time it takes Cassius to drive his boat upstream = 45 minutes

Time it takes Cassius to drive his boat downstream = 30 minutes

Speed upstream = 3 miles per hour slower than his speed going downstream

2.  Find his upstream and downstream speeds.

Let's prepare and write down our equation this way:

x = Speed of Cassius boat downstream

x + 3 = Speed of Cassius boat upstream

45 * x = 30 * (x + 3)

45x = 30x + 90

15x = 90

x = 90/15

x = 6 ⇒ x + 3 = 9

Cassius drives at 9 miles per hour upstream, and 6 miles per hour downstream.