The number of mosquitoes in Anchorage,
Alaska (in millions of mosquitoes) as a function
of rainfall (in centimeters) is modeled by:
M(x)=-x^2+12x
After how many inches of rainfall will there not
be any mosquitoes?

After 12 inches of rainfall there not be any mosquitoes

Step-by-step explanation:

The correct question is

The number of mosquitoes in Anchorage,  Alaska (in millions of mosquitoes) as a function  of rainfall (in inches) is modeled by:

M(x)=-x^2+12x

After how many inches of rainfall will there not  be any mosquitoes?

we have

where

M(x) is number of mosquitoes in Anchorage,  Alaska (in millions of mosquitoes)

x is the rainfall in inches

Remember that the x-intercepts are the values of x when the value of the function M(x) is equal to zero

That means ---> The x-intercepts are the values of the rainfall when the number of mosquitoes is equal to zero

Find the x-intercepts

For M(x)=0

Factor -x

The solutions are

x=0 in and x=12 in

therefore

After 12 inches of rainfall there not be any mosquitoes

57 732

step-by-step explanation:

i dont really.know

to plot points   for x just start at the origin (middle) and go to the left however many times it say(if the number is a positive) if the number is a negative then go right however many times it says if it is 0 go nowhere

now keep you pencil there and go up however many times it says on y(if it is positive) if it is negative then go down however many times it says. if it says 0 go nowhere.

you have just plotted a point! now when you finish plotting all of them connect them with a ruler

plot each point as (-3, 7), (0,4), (3,1), (8,-4)   in the parenthesis on the left of the comma is x and the right is y.