Evaluate formulas from real-world contexts
Put the given number in place of each letter. Then work out the powers, the multiplying and the adding, in that order.
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See worked examples
f(x) = 4x − 9. Find f(−5).
Answer: -29
f(x) = −4x + 8. Find f(0).
Answer: 8
f(x) = −5x + 7. Find f(1).
Answer: 2
Tip: Put the given number in place of each letter. Then work out the powers, the multiplying and the adding, in that order.
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