a home improvement store sold wind chimes for $30each A customer signed up for a free membership card and received a 5% discount off the price. sales tax of 5% was applied after the discount. what's was the final price of the wind chime show working please

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times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3

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

a ≈ 172.05

step-by-step explanation:

the pictures.