Answer:
So there is 8 old books
Step-by-step explanation:
If you have no calculator, pretend like the decimals aren’t there then add them back depending on how many places you have after the decimal. for example: 2.5 times 2.5, if you pretend there are no decimals, you get 625, then you have to add the decimals back. since you have 1 digit after each decimal in each number, you add 1+1=2 to get the number of places you have to add back. so you get 6.25
The answer is 18 pages per day. If you add 36 and 54 you get 90. Since she reads the same everyday over 5 days you can set up equation 5x = 90. Divide each side by 5 yields x = 18. To check, it takes 2 days to read 36 pages and 3 days to read 54 pages for a total of 5 days at 18 pages per day.
7x-21 + 3y -xy
I think that is what you're asking for
i think that the answer is 0 because f(2) means that you substitute 2 for x
2(2)=4
4-4=0
