Answer:

Step-by-step explanation:
Since these are like-terms, they can be added together.
7z + 7z = 14z
3000x + 1000y < 30000
2000x + 6000y < 30000
x = 7.5
y = 7.5
Answer:
y-6
Step-by-step explanation:
Answer:
2d, 3b
Step-by-step explanation:
pay attention in class
these are simple theorems
i wish you all the best
if you want, i can explain them to you