2. use the distance formula to determine the distance between points (9,15) and (3,7).

Step-by-step explanation:

Distance between (x₁,y₁) and (x₂,y₂) is given by

Here (x₁,y₁) = (9,15) and (x₂,y₂) = (3,7)

Using distance formula to determine the distance, d between points (9,15) and (3,7).

Distance between points (9,15) and (3,7) is 10

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