The total number of burgers sold from a restaurant from monday to sunday can be modeled by the function f(d)=200d3+542d2+179d+1605and the number of visitors to the restaurant from monday to sunday can be modeled by g(d)=100d+321, where d is the number of days since monday. what is the average number of burgers per person?

go on the tube you might find some information there

step-by-step explanation:

6.48/4 4 goes into 6.48 1.62 times

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15