The senior class had a car wash to raise money for the senior trip. it cost them $35 for supplies. they washed 75 cars and charged $6 for each car.

which of the following expressions represents the money they raised for their trip?
$35 + 75 • $6
$35 - 75 • $6
75 • $6 - $35
75 - $35 • $6

16.9 times 2.85

step-by-step explanation:

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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

c

step-by-step explanation: