Answer:
D. All those resources can be found in Africa
Answer:


Step-by-step explanation:




Answer:
A
Step-by-step explanation:
Solution is in this picture.
1- <span>D. 9x2yz
2- </span><span>C. 2x2y + x2 − 3x + 4
3- </span><span>A. x + 2xyz
4- </span><span>B. 3x + y + z</span>