Question

which expressions are equivalent to $2r + (t + r)$? choose all answers that apply: a $2rt + 4r$ b $r + t$ c none of the above

Explanation:

Step1: Remove parentheses

$2r + t + r$

Step2: Combine like terms

$2r + r + t = 3r + t$

Step3: Compare with options

Option A: $2rt + 4r$ has a term with $rt$ (product of variables) which is not in $3r + t$, so not equivalent.
Option B: $r + t$ has only one $r$ term, not $3r$, so not equivalent.

Answer:

C. None of the above