Ibuy a hat for $12 and give the cashier $20. how much change do i receive? what is the expression?

20-12=8

Step-by-step explanation:

so your giving the cashier 20 and it cost 12 you get 8 back

Step-by-step explanation:20-12=6 because 20 is what you have him and 12 is how much it costs so you would do 20 minus 12

answer: the dogs need to shift their focus to human scent.

its because the dogs being trained are for search and rescue thus they need to be able to track humans and their specific scent

the direct variation says that:

then the equation is of the form is given by:

            where k is the constant variation.

from the given table:

consider any value of x and m(x)=y

x = 2 and m(x)=y = 3

substitute these value in [1]; we have;

divide both sides by 2 we get;

⇒

check:

put x = -1 and m(x) = -1.5

substitute in the equation:

-1.5 = -1.5                   true

therefore, the function m(x) represents a direct variation

graph of this function as shown below: