D. 7x - 1
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
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Algebra I
Terms/ Notation
Step-by-step explanation:
Step 1: Define
Identify
f(x) = 5x - 2
g(x) = 2x + 1
Step 2: Find
Substitute in functions: (f + g)(x) = 5x - 2 + 2x + 1Combine like terms: (f + g)(x) = 7x - 1