To simplify the expression \((2b + 3r) + (4b + r)\), you can combine like terms:
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Combine the terms with \(b\):
- \(2b + 4b = 6b\)
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Combine the terms with \(r\):
- \(3r + r = 4r\)
Putting it all together, you get:
\[ (2b + 3r) + (4b + r) = 6b + 4r \]
So the simplified expression for the total cost is \(6b + 4r\).
The correct response is:
6b + 4r