<span>12 + 10 ÷ 2 − 3 is an "order of operations" problem. "PEMDAS" refers to the order in which mathmatical operations must be carried out: parentheses, exponentiation, mult/div, add'n/subtr.
In </span><span>12 + 10 ÷ 2 − 3 you MUST divide 10 by 2 before you do anything else.
This gives you </span><span>12 + 5 − 3. Since + and - are on the same level of operations, you can work from left to right: 12+5 is 17; from 17 we subtract 3, arriving at 14 (answer).
I think the answer is 2 weeks 6 days because if over the course of 2 weeks they took 12 I ready quizzes the he needs 18 quizzes and it leaves 1 day extra
