42 is the answer your looking for.
Answer: the answer is 54
Step-by-step explanation: The error in the expression was that it was multiplied by 1 so it can't be one unless it was also 1 and it's not it is 54.
Answer:
Step-by-step explanation:
If
then
by combining like terms. (I'm thinking you might have mistyped the problem because this representation is weird).

(17*3) --- to find the total points of the 3 quizzes
17*3=51
the third quiz grade=51-14-19=18
hope this helps