220
from 218 the 1 is in the tens column. this is the figure that needs to be rounded.
using the following rule 
If the digit after the 1 is ≥ 5 then round 1 up to 2
If the digit after the 1 is < 5 then the 1 remains as 1
here the digit after the 1 is 8 so the 1 in the ten's column becomes 2 and the 8 is replaced by 0
218 ≈ 220 ( to the nearest ten )
 
        
             
        
        
        
If you're going to use technology (Brainly) to solve this problem, you might find you get a quicker answer using the technology of your graphing calculator. 
It is often convenient to cast the problem in the form f(θ) = 0. You can do that by adding 1 to both sides of the equation.

 
        
             
        
        
        
Answer:
Resulting figure after plotting the given coordinates (0, 2) (4, 6) (10, 12) (18, 20) is a LINE.
Step-by-step explanation:
Please find the attached document for figure plotted.
 
        
             
        
        
        
Answer:
x = 4
Step-by-step explanation:
<u>Step 1:  Set both parts equal to 0</u>
x - 4 = 0 and x - 4 = 0
<u>Step 2:  Solve for x by adding 4 to both sides</u>
x - 4 + 4 = 0 + 4 and x - 4 + 4 = 0 + 4
x = 4 and x = 4
Answer:  x = 4