Final answer:
The algebraic expression equivalent to the given expression (8x + 14) + (7x-3) is found by combining like terms, which results in 15x + 11, corresponding to answer choice D.
Step-by-step explanation:
To find the algebraic expression that is equivalent to the given expression, we combine like terms. The expression (8x + 14) + (7x - 3) can be simplified by adding the coefficients of the x terms together and the constant terms together:
- Combine the x terms: 8x + 7x = 15x.
- Combine the constant terms: 14 + (-3) = 11.
Putting it all together, we get the simplified expression 15x + 11, which is answer choice D.