Answer:
16 seconds per download
Step-by-step explanation:
480/30 = 16 seconds
When you separate them

Solve them separately:

Remove the denominators:

Find GCF (Greatest Common Factor):
Answer:
2x+20+3x+10 = 180 (int. angles, parallel)
5x+30 = 180
5x=150
x=30
Answer:
17. 15
18. 8(this one I'm not sure tho what does the right one say)
19. 32
20. 5
Answer:
(10,-3)
Step-by-step explanation: