Write an expression Pls only answer if you know how to do it and if u know the answer. Will mark brainliest!!!

-10 ÷ -2/5

Step-by-step explanation:

-10  ÷ -2/5 is the same as -10 · -5/2 = 50/2 or 25

1 is c

2 is a

3 is a

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