Evaluate expressions with fractional values for variables
Replace x with the given number everywhere it appears. Work out powers first, then multiply, then add or subtract.
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f(x) = −2x − 9. Find f(4).
Answer: -17
f(x) = −5x + 1. Find f(1).
Answer: -4
f(x) = x − 5. Find f(−3).
Answer: -8
Tip: Replace x with the given number everywhere it appears. Work out powers first, then multiply, then add or subtract.
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