Acar drives 40 miles on local roads at 20 mph, and 180 miles on the highway at 60 mph, what is the average speed of the entire trip?
(a) 36 mph
(b) 40 mph
(c) 44 mph
(d) 52 mph
(e) 58 mph

C) 44 mph

Step-by-step explanation:

We know that

Given : A car drives 40 miles on local roads at 20 mph.

i.e. Time taken :

Also, it drives 180 miles on the highway at 60 mph.

i.e. Time taken :

We know that the formula for Average speed is given by :-

So the average speed of the entire trip will be :-

Hence, the average speed of the entire trip is 44 mph.

Therefore , the correct answer is C) 44 mph.

it would be 6xy and -16xy.