Question

Which of the following expressions represents the following statement?
Statement: 9 is added to 9 and then the result is multiplied by 7 multiplied by 7.

• A. $(9+9)\times \left(7\right)$
• B. $(9+9)\times 7^2$
• C. $(9\times 9)+7^2$
• D. $9+7^2$

Answer 1

The correct option is B $(9+9)\times 7^2$

Let’s break the statement into two parts.
First part:
9 is added to 9 = (9 + 9)

Second part:

And then the result (9 + 9), is multiplied by 7 is multiplied by 7.
$=(9+9)\times (7\times 7)$

$=(9+9\times 7^2)(7\times 7=7^2\text{in exponential form})$

Hence, $(9+9)\times 7^2$ matches the given statement.