Answer:
that conclude idk
Step-by-step explanation:
-6U+-15+3.5U=-1U
-2.5U+15
Answer:

Step-by-step explanation:
Given


Required
Determine the height
The volume is calculated as:

Since, it has a triangular cross-section, the expression becomes:

So, we have:




So, you basically plug the values into the formula you have been given. D divided by T gives you the average speed.
We know the distance D is 145 miles and the Time T is 2.5 hours.
So, 145/2.5=58
Therefore, the cars average speed was 58 miles / hour