Stanley's birthday party costs $99, plus an additional $5 for each guest he invites. How many guests can there be, at most, if Stanley can afford to spend a total of $424 on his birthday
party? Write and solve an equation to find the answer

29 is the correct answer

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

answer: x=3 and y=4

step-by-step explanation: