Answer:
(b) Jo answered 4 which is the right answer.
Explanation:
First, you have to remember PEMDAS which is parentheses, exponents, multiplication, division, addition, and subtraction.
In this case, you need to do 18/3 first because that is in the parentheses which always goes first.
Your answer should be 6 and you should write the question like this:
40-(6)^2
Now, you need to do the exponent next which is 6x6 not 6x2.
Remember, exponents, are the base which is the number 6 multiplied by itself to that many times so in this case, our base is 6 and the exponent says we need to have 6 multiplied to itself 2 times. 6x6
We like to say 6 to the power of 2 is 36.
So now you need to write the simplified equation to this:
40-36=n
Our n variable is a placeholder for our answer.
Now it's basic subtraction which is 40-36 = 4
Therefore, Jo had the right answer.