Answer:18
Step-by-step explanation: Using the order of operations (PEMDAS), you would first perform any calculations inside of parentheses, then exponents, then multiplication and division from left to right, and finally, addition and subtraction from left to right.
9 + 15 / 5 x 3
= 9 + 3 x 3
= 9 + 9
= 18
So the answer would be 18.