Answer:

Step-by-step explanation:
The given functions are:

and

We want to to find

Note that:

We substitute the functions to obtain:

We now substitute x=7, to get:

This implies that


Converting 1 hour and 15 minutes to minutes only, its 75 minutes. 75 - 54 is 21. So, Martin has 21 minutes left to finish.
Each pallet of cement weighs 303.5 pounds. You just have to divide 4,856 by 16
Base x height
length x width
hope this helps XD