Answer:
-1
you use the given functions to set up and simplify f(2)
D. XYZ is obtuse
Step-by-step explanation:
2800 - 4000
40 × 70 = 2800
50 × 80 = 4000
there are 9 possibilities I think
-20 3/4, -15 1/2, -14 3/4,