Question

What is the value of this expression? 9{[(9 x 9 - 10) = 2] – 5} O A. 274.5 . O B. 314.5 O c. 354.5 O D. 639 O E. 729

Answer 1

The value of the expression is 274.5

Here, we want to find the value of the expression

To do this, we are going to use the order of operation

This order is called the PEDMAS

Where P stands for parentheses , E for exponent (roots and powers). D for division, M for multiplication. A for addition and S for subtraction

Now, we can see that there are three parentheses

We start with the innermost one

That is the one with multiplication and subtraction

By doing this, we have that;

`\begin{gathered} (9*9)-10\text{ = 81-10 = 71} \\ \text{Then, divide by 2} \\ (71)/(2)\text{ =35.5} \\ \text{Then subtract 5} \\ 35.5-5\text{ = 30.5} \\ \text{Multiply finally by the 9 outside} \\ =\text{ 30.5}*\text{ 9 = 274.5} \end{gathered}`