Question: if a * b = 2 a – 3 b + ab , then 3 * 5 + 5 * 3 is equal to :
A) 22
B) 24
C) 26
D) 28
E) 29
Correct answer: a
Grade: 6 | Topic: Expressions and Equations | Difficulty: Medium | Standard: 6.EE.A.2