To simplify the expression \((2b + 3r) + (4b + r)\), we can combine like terms.
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Combine the coefficients of \(b\):
- From \(2b\) and \(4b\), we have \(2b + 4b = 6b\).
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Combine the coefficients of \(r\):
- From \(3r\) and \(r\), we have \(3r + r = 4r\).
Putting it all together: \[ (2b + 3r) + (4b + r) = 6b + 4r \]
Thus, the simplified expression is \(6b + 4r\).
Therefore, the correct response is: 6b + 4r.