Question

Evaluate the following expression.18.9 x [(2 x 2.7) – 4.6] - 2 to the power of 2 =

Answer 1

11.2

Explanation:

To perform the operation given, we use PEMDAS.

Parenthesis comes first; therefore,

`18.9\lbrack5.4-4.6\rbrack-2^2`

Exponents come second:

`18.9\lbrack5.4-4.6\rbrack-4`

parenthesis again

`18.9\lbrack0.8\rbrack-4`

multiplication next

`15.12-4`

and finally, subtraction

`11.2`

which is our answer!