A store gives away gift bags during a sale. Of these gift bags, 50% are green, 20% are yellow, and 30% are blue.
The average number of items in each green bag is 8. The average number of items in each yellow bag is 5. The average number of items in each blue bag is 8.

What is the average number of items in all the gift bags?

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step-by-step explanation:

4th option is correct xy=-10

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the correct answer is 5 6 and 7

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