Question 13 • (OC27) MATH COLL ALGEBRA-1200710-S1-Degele-VOL7006P
The expression f(x) = 5x − 7 uses only multiplication and subtraction, which are defined for every real value of x. There are no restrictions such as a denominator that could be zero or a square root requiring a nonnegative input. Therefore, the domain is all real numbers: choice D.
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