Shopping spree. Greg is shopping in a large urban depart- ment store with many floors. He enters the store on the

middle floor from a skyway, and he goes directly to the

credit department. After making sure his credit is good, he

goes up three floors to the housewares department. Then

he goes down five floors to the sporting goods department.

Next, he goes up six floors to the media department. Finally,

he

goes

down ten floors to the main entrance to the store on

the first floor at ground level and leaves to go to another store.

How many floors does this department store have if it has no

basement?

12 floors

Step-by-step explanation:

middle +3 floors= +3 .

+3 - 5 = -2.

-2 + 6= +4.

+4 - 10 = 6 x 2 = answer 12

to clarify the plus or minus mean how many floors he is above or below   the middle floor

answer: yes, he is correct

step-by-step explanation: 10x-1=59

                                              1-1=0     59+1=60

60/10=x=6

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