They are 6, 8, 10, 12 years old.
all of those added is 36 and two-year intervals translates to 2 years apart per cousin.
Answer:
The answer is letter D.
Step-by-step explanation:
-2(4x+8)+3(5x-1)
=-8x-16+15x-3
=-8x+15x-16-3
=7x-19
The answer is A. 2(-3)^4+2(-3)-17 = 139.
