Mulan got a $50 gift card to an online music store. At this store, she can buy both record albums and digital downloads. She uses the gift card to buy an album for $9.99. She also wants to use the gift card to buy some songs. Each song costs $1.19. Which of these inequalities describes this situation, where n is the number of songs Mulan wants to buy?

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

30005

yes ok                                            

explanation:

step-by-step explanation:

step-by-step explanation: