Question

the dimensions of rectangles A and B shown6ft nft3ft

Answer 1

The area of the given rectangle is given by

$\begin{gathered} A=\text{wide}\times length \\ A=3\times(6+n) \end{gathered}$

By distributing the number 3, we get

$\begin{gathered} A=3\times6+3\times n \\ A=18+3n \end{gathered}$

By comparing our results, we can see that option 1, option 3 and option 4 are true. that is,

$\begin{gathered} A=18+3n \\ A=3\times(6+n) \\ A=3\times n+3\times6 \end{gathered}$

the rest of them are false