Add 31 to both sides which will give you
9h = 130
We have been given that an employee shreds 341 pages in 11 minutes of work.
First of all we will divide 341 by 11 to find number of pages shred by employee in one minute.

Now let us multiply 31 by 20 to find number of pages shred by employee in 20 minutes.

Therefore, employee will shred 620 pages in 20 minutes.
Answer:
The greenhouse effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without this atmosphere.So following options are correct options
- slowly increasing global temperature
- caused when atmospheric gases trap heat
- increasing because of carbon dioxide emissions
The correct answer is 42.
5 • 8 = 40
40 + 2 = 42