Advanced MathEasy–MediumProfit from a quadratic model
Advanced Math practice question
A workshop's daily profit, in dollars, from making x chairs is given by P(x) = −x² + 20x − 36. What is the profit, in dollars, from making 10 chairs?
Answer: 64
−100 + 200 − 36 = 64.
Common wrong answers
- If you answered 36
- 36 drops the sign of the constant.
- If you answered 164
- 164 adds 36 instead of subtracting.
- If you answered 264
- 264 treats −x² as +x².
More Advanced Math questions
- Easy–Medium
If f(x) = 2x² − 3, what is f(4)? - Easy–Medium
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For x ≠ 0, which expression is equivalent to (x² + 3x) / x? - Easy–Medium
What are the solutions to the equation 2(x − 3)² − 32 = 0 ?
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