Multistep equations in context
suppose the allmans want to rent a convertible for the day.
they have a choice of two rental companies:
• a one-day rental at nifty car rental costs $30 plus 60
cents per mile.
• a one-day rental at shazam car rental costs $55 but
only charges 35 cents per mile. worksheet

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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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answer: d.) the total number of protons and neutrons is 15

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step-by-step explanation: