Snorkel and two friends rented 3 life jackets and a sailboat. The life jackets were $3 each and the boat was $12 an hour. The total cost was $93. Which equation could be used to find the number of hours to rent the sailboat? you are not solving it. just use the correct equation if you had to solve it.

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step-by-step explanation:

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

answer

you start with $5 and save $10 a week until you have at least $45wer

step-by-step explanation:

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