2 Ali's bag welghs 15 kg 302 g. Her backpack welghs 7 kg 41 g. The combined welght of the bag and backpack is 729 g less than the welght of All's suitcase. How much does All's suitcase weigh?

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

step-by-step explanation:

the answer is 89 d

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