what does this mean $\frac{18}{2}[2(3) + (18-1)(7)] = 1125$.

Answer 1

This is an equation that needs to be solved.

First, find the value inside the square brackets:

$2(3) + (18-1)(7) = 6 + 17(7) = 6 + 119 = 125$

Next, substitute this value back into the equation:

$\frac{18}{2} \cdot 125 = 9 \cdot 125 = 1125$

So, the equation simplifies to $1125 = 1125$, which is a true statement.