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Mathematics, 19.07.2019 08:30 Ashleymsmith
Determine wether or not tye following ratios are proportional. 7 inches in 9 hours; 42 inches in 54 hours?
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Answers: 1
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Answer from: Quest
answer: 204
step-by-step explanation:
we are told that the revenue is
x⋅(4080−10x)=−10x^2+4080x
this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.
so in this case, we have a=−10 and b=4080, so the x-value of the vertex is
−b/2a= −(4080)/2(−10)=204
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Determine wether or not tye following ratios are proportional. 7 inches in 9 hours; 42 inches in 54...
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