Help please anyone I just don’t get it

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

Simply 8x squared + 5(7x squared- x) - 2x =

Aaron invested a total of $4,100, some in an account earning 8% simple interest, and the rest in an account earning 5% simple interest. how much did he invest in each account if after one year he earned $211 in interest? select one: a. $200 at 8%, $3,900 at 5% b. $3,200 at 8%, $900 at 5% c. $900 at 8%, $3,200 at 5% d. $3,900 at 8%, $200 at 5%