Bill is $75. tip is 18% what is the total bill

Total bill = $88.50

Step-by-step explanation:

Amount of bill = $75

Tip = 18%

Amount of tip =

Amount of tip =

Amount of tip = $13.50

Total bill = Bill + Tip

Total bill = 75 + 13.50

Total bill = $88.50

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