Mia's cafe has regular coffee and decaffeinated coffee. this morning, the cafe served 25 coffees in all, 15 of which were regular. what percentage of the coffees were regular? write your answer using a percent sign (%)

60%

Step-by-step explanation:

percentage of the coffees were regular=15/25*100=60%

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