Help please I need a correct answer really fast!! Which pair of angles are alternate exterior angles?
A. ∠1 and ∠8
B. ∠1 and ∠7
C. ∠2 and ∠7
D. ∠2 and ∠9

 C) angle 2 and angle 7

Imagine the parallel lines form the boundaries of river. Angles 3, 4, 5 and 6 are considered interior angles as they are in the river. Angles 1, 2, 7, 8, 9 and 10 are exterior because they're outside the river.

Angles 2 and 7 are on opposite sides of the transversal cut that I've highlighted in red (see diagram below). So that's why they're considered alternate. Combine "exterior" and "alternate" to get "alternate exterior"

b) the dogs need to shift their focus to human scent.

y=mx+b

step-by-step explanation:

m is slope, b is y-intercept