Step-by-step explanation:

Answer:
a shape with 4 sides
Step-by-step explanation:
duh
Answer:
A
Step-by-step explanation:
3x + 7 - x + 2 combine like terms
3x - x + 7 + 2
2x + 9
Option A
I hope this helps you
2x+4y=10
5x-4y=11
2x+4y+5x-4y=10+11
7x=21
x=3
y=1
Answer:
A and D
Step-by-step explanation: