Answer:
21
Explanation:
First, look at PEMDAS.
P = Parentheses
E = Exponets
M = Multiplication
D = Division
a = Addition
S = Subtraction
So, Is there Multiplication? Yes! 9 x 2 is Multiplication! So, what is 9 x 2? To simplify it down, what's 9 + 9? 9 + 9 = 18! So, now, what's 9 x 2? (9 x 2 and 9 + 9 are mostly the same, and they both have the same product.) So, that means 9 x 2 is simply 18. Now for the easy part!! A, as I wrote, stands for addition. Yes, there is an addition problem. What's 18 + 3? If you add 2 + 18, that's 20! Now you need to add 1 more. The final product is simply 21.