Answer/Step-by-step explanation:
Starting with:
8r + 5p + 7
There are three terms. 8r is a term; 5p is a term; 7 is a term. See how the terms are separated by + or -
r and p are variables. Most often the variable is a letter, that way it can stand for an unknown value. It can vary.
5 is the coefficient of p. Its the number right next to the p. (They are multiplied together)
7 is the constant. Constant means unchanging, right? So 7 is a plain old number, it doesn't change like a variable can. A plain number with no variable is a constant.