Answer:
21
Step-by-step explanation:
21
Answer:
40 sq ft
Step-by-step explanation:
A= bh
A= (4)(10)
A= 40
Answer:
837,000
Step-by-step explanation:
If a number is above 5 round up, if it is below 4 round down
Answer:
-4 and 4
Step-by-step explanation:
<u>Method 1</u>
Apply Difference of Two Squares Formula: 
Given 
Rewrite 16 as 4²
Therefore,
and 






<u>Method 2</u>
Given equation:

Add 16 to both sides:


Square root both sides:


Therefore, x = -4, x = 4