Student bought n books with 20 dollars and 10-n books with 30 dollars each if p is the total price of the books then which one of the following is correct A p=300-10n
B. P=3n+200
C. P=600-5n
D. P=6n+500 pleas I will be best friend forever

Which of the following is the equation that says that the product of a number and ten is equal to 20 percent of that number ? a) 10n= 2.0n b) 10+n=.20n c) n+ .20n=10 d) 10n=0.20n

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Meghan has created a diagram of her city with her house, school, store, and gym identified. a. how far is it from the gym to the store? b. meghan also wants to walk to get some exercise, rather than going to the gym. she decides to walk along arc ab. how far will she walk? round to 3 decimal places.