alleryStart learning →Evaluate the expression 9x minus 2 when x equals 5.
A43
B27
C47
D63
Answer & Solution
Correct answer: A. 43
1. To evaluate an expression, substitute the given number for the variable.
2. Substitute 5 for x: 9 times 5, minus 2.
3. Multiply first: 9 times 5 equals 45.
4. Subtract: 45 minus 2 equals 43.
_Source: OpenStax Prealgebra (CC BY 4.0), Ch 2 "The Language of Algebra", section 2.2 Evaluate, Simplify, and Translate Expressions_
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