I believe the answer is 1.2
A cube and a rectangle prism both have 8 vertices
Let the first integer be
. So, the next even number is 
Let's translate the formula: the square of the second is
, twice the first is
. So, the equation is

Expand the square to get

The solutions to this equations are

So, the possible consecutive even numbers are

Answer:
16
Step-by-step explanation:
Use the method of PEMDAS (Parenthesis, Exponent, multiplication, division, addition and then subtraction.)
When using this order you would do 10-9 first
23 + 5 * (10-9) - 12
23+ 5 * 1 - 12
then 5 times 1
23 + 5 * 1 - 12
23 + 5 - 12
then 23 + 5 and subract 12 from the solution
23 + 5 - 12
28 - 12 =
16