Answer:
Step-by-step explanation:
f(x) = -3x² - 6x
<u>Requirements of the question</u>
Find the value of f(-9)
<u>Substitute values into the given function</u>
f(x) = -3x² - 6x
f(9) = -3 (-9)² - 6 (-9)
<u>Simplify the exponent</u>
f(9) = -3 (81) - 6 (-9)
<u>Simplify by multiplication</u>
f(-9) = (-243) - (-54)
<u>Simplify by subtraction</u>
Hope this helps!! :)
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Answer:
Bobby's economic profits for the day is $0.60.
Step-by-step explanation:
Bobby sells 20 glasses of lemonade for $0.20 per cup.
Amount earned = dollars
The average total cost is $0.17.
So, difference in selling amount and average = dollars
Therefore, Bobby's economic profits for the day is = dollars
Hence, the answer is $0.60.
Answer: 9000$
Step-by-step explanation:
Let 's use the formula to find the vertex of the parabola:
ax²+bx+c=0