Part a. evaluate the algebraic expression, 4x, for the different values of x listed.
x = −2
x = 3

part b. evaluate the algebraic expression, 3x + 2, for the different values of x listed.
x=−0.5
x=−1

Part A : a) -8  b) 12

Part B : a) 0.5  b) -1

Step-by-step explanation:

For Part A:

Let the algebraic expression be

so,

put we get

put we get

For Part B:

Let the algebraic expression be

so,

put we get

put we get

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