Answer:
its D!
Step-by-step explanation:
if you plug 3 into x for any of the equations, only the last one equals 1, so its the only one that works :)
Answer:
15 + 5i
Step-by-step explanation:

Answer:
5 in total
Step-by-step explanation:
Answer:
30
Step-by-step explanation:
20+2((3)(7)−(4)(4))
=20+2(21−(4)(4))
=20+2(21−16)
=20+(2)(5)
=20+10
=30