State whether each pair of terms are like terms. (so yes or no)
7. 4xy and 3xy
8. 2s2 and 5s
9. -10a and -10b

4xy and 3xy are, 2s and 5s are, but -10 and -10b aren't.

Step-by-step explanation: 4xy and 2xy have the same terms. 2s and 5s have the same terms but -10a and -10b have different variables.

To find the answer to this problem you would have to change 60% to its decimal form which you would get by moving the decimal to the LEFT twice, which would leave you with .60. Then after that you simply multiply .60 by 80 to get how much cheese the recipe required. You always multiply and move the decimal to the left twice when dealing with percentages, i hope i helped! please give me brainliest