Question

HELP HELP HELP PLSSSSS !!!

Wapi simplified an expression. His work is shown below.

In which step did Wapi make his first mistake?

Answer 1

step 3

Explanation:

The complete question in the attached figure

we have

`7( 8.5-1.5) +8 : 2`

we know that

Applying PEMDAS

P ----> Parentheses first

E -----> Exponents (Powers and Square Roots, etc.)

MD ----> Multiplication and Division (left-to-right)

AS ----> Addition and Subtraction (left-to-right)

step 1

Parentheses first

`7( 7) +8 : 2`

step 2

Multiplication (left-to-right)

`49 +8 : 2`

step 3

Division

`49 +4`

step 4

Addition

`53`

therefore

The step 3 is the first mistake