Answer:
the feather colors and beak shapes of every bird observed in a park.
Step-by-step explanation:
you said it in your question
The steps in the patterns A and B form a sequence
The attached diagram represents dots in patterns A and B
<h3>How to draw the diagrams</h3>
For pattern A, we have:
Step 2 = 10 dots
Increment of 3 dots in each step
This means that:
Step 0 = 4 dots
Step 1 = 7 dots
Step 2 = 10 dots
Step 3 = 13 dots
For pattern A, we have the following rule

When n = 0 to 3, we have:

Step 0 = 1 dot

Step 1 = 3 dots

Step 2 = 9 dots

Step 3 = 19 dots
Next, we draw the diagrams of both patterns (see attachment)
Read more about patterns at:
brainly.com/question/15590116
Answer:
D : [-2,0) U (0, infinity) ; -2<=x<0 U x>0
Answer: 320 black pens
Step-by-step explanation:
480 ÷ 3 = 160
160 red pens
Then you have
160 + 160 = 320 black pens
If you have any questions let me know! :)
Hope this helps!!! Good luck!!! ;)