Question

Can someone help me with number 21. Please show steps

Answer 1

39

Explanation:

Use PEMDAS.

Starting equation:

`3[8^(2)/(5^(2)-3^(2) )+9]`

Start with evaluating the Exponents inside the innermost Parentheses:

`3[8^(2) /(25-9)+9]`

Evaluate the Subtraction inside the innermost Parentheses:

`3[8^(2) /(16)+9]`

Now that we have solved the first set of Parentheses, we need to solve the second, starting with the Exponents:

`3[64/16+9]`

Next, we need to evaluate the Division inside the Parentheses:

`3[4+9]`

After that, evaluate the Addition inside the Parentheses:

`3[13]`

Finally, evaluate the Multiplication:

`3[13]=39`

The answer is 39.

Answer 2

39

Explanation:

You need to solve the exponents first

3[64÷(25 -9)+9]

Then you can do the parenthesis

3[64÷ 16 +9]

Then divide 64 by 16 which equals 4

3[4+9]

Then you do the brackets

3 x 13

Which equals 39