-5(-9-7x)
Please help this so very confusing to me and I need to pass

45 + 35x

Step-by-step explanation:

To simplify

multiply the outside number by the inside

also, the negative and the negative multiply together to make a positive number.

35x + 45

Step-by-step explanation:

-5(-9 - 7x)

Distribute or expand the brackets.

-5(-9) - 5 (-7x)

45 + 35x

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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