Write the polynomial in descending order: 4x + 3x2 - 1

3x² + 4x - 1

Step-by-step explanation:

Hello! 150 minutes is equivalent to 2.5 hours, because there are 60 minutes in 1 hour and 30 minutes is a 1/2 hour. 150/60 is 2.5. first, let's find how far he went on the speeds he went. he went 75 mph for 2 ½ hours.75 * 2.5 is 187.5. then, he went 81 mph for 2 hours. 81 * 2 is 162. add both numbers up. 187.5 + 162 = 349.5. michael drove 349.5 (349 ½) miles.