There were 7 sheets of paper. Some of them were cut into three parts. Then, in total there were 13 pieces of paper. How many sheets of paper were cut?

3

Step-by-step explanation:

13-7=6

If some were cut into three that means that it adds two more sheets for every one that was cut.

So we have to do 6/2 which is 3

AND THAT IS YOUR ANSWER!!!

answer: the answer is one of

step-by-step explanation:   we are given to write a proper fraction where the whole is divided into an even number of equal parts less than ten, and an odd number of those parts exist.

an even number less than 10 may be one of 2, 4, 6 or 8. so, the whole may be one of these four evens.

now, an odd number of these parts must exist, so the numerator must be an odd number, one of 1, 3, 5 or 7. it cannot be 9 because then the fraction will become improper.

thus, our fraction may be one of the following

b.an increase in a causes b to decrease