Simplify: ( y^−7 × y^−3 )−1 a. y−21 b. y 21 c. y−10 d. y 10

D

Step-by-step explanation:

The rules we need to simplify this are:

and

Now, let's simplify the problem:

Answer choice D is y^10, so that's correct.

24+x=y

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