Answer:
(a) 
Step-by-step explanation:
The question is incomplete. (See comment for complete question).
From the completed question, we have:

--- number of pyramids
Required
An expression for the area of the base
The total base length of the pyramid represents the perimeter of the base.
And since the base is a square, then the following relationship exist.

Where L represents the length of each side.
This gives

Make L the subject

The area of the base is then calculated as:


Answer:
hrs
<u>Step-by-step explanation:</u>
1st painter:
2nd painter: 
1st + 2nd = Together
+
= 
+
= 
4x + x = 8
5x = 8
x = 
= 
Answer:
C. x > 15
Step-by-step explanation:
Okay, all we need to do is divide 8 from both sides:
-104/8=-13
So x=-13
:D