The ratio of pears in a fruit salad to people if will serve is 7:15. If Waldo wants to serve 105 people, how many pears will Waldo use?

49

Step-by-step explanation:

7/15=x/105

15x=735

x=49

where is the figure

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