A binary operation \Delta is defined by a \Delta b = a + 3b + 2.
Find (3 \Delta 2) \Delta 5
A
35
B
59
C
28
D
87
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
a \Delta b = a + 3b + 2
(3 \Delta 2) \Delta 5 = (3 + 3(2) + 2) \Delta 5
= 11 \Delta 5
= 11 + 3(5) + 2
= 28
Source: Myschool Past Questions Archive (Record #55375)