Help 4/5 x 5/5 black means its right red means wrong

Step-by-step explanation:

4/5 x 4/5 = 16/25

Just do 4x4 on top of 5x5

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

answer: you need to organize this better it does not make sense.

step-by-step explanation: ?