Question

Can someone explain to me how to do this one to it would be helpful

Answer 1

You will have to work out each equation to find which ones are valid.

As long as you follow the order of operations, you will arrive at the right answer.

The first equation.


`(3^2 + 4) - 2 = 11`

`(9 + 4) - 2 = 11` <-- First, do the parentheses. In the parentheses was
an exponent. I simplified that.

`(13) - 2 = 11` <-- Add the numbers in the parentheses.
11 = 11

The first equation is true

The second equation.

The second equation has the same left-hand side as the first.
And it simplified to 11.
And we know that 11 ≠ 5.

The second equation is not true.

The third equation.


`2 * (3^2 - 1) = 16`

`2 * (9 - 1) = 16` <--- PEMDAS tells us to first simplify the parentheses.
In the parentheses, there was an exponent.
I simplified it.

`2 * (8) = 16` <--- Subtraction within the parentheses.
16 = 16

The third equation is true.

The last equation has the same left-hand side as the third equation.
And when we simplified the third equation's left-hand side we got 16.

And 16 ≠ 35.

So, only the first and third equations are true.