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If a x b = 2a - 3b + ab, then 3 x 5 + 5 x 3 is equal to?

A. 20

B. 22

C. 24

D. 26

 Apr 27, 2021
 #1
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a * b = 2a - 3b + ab

3 * 5 = 2(3) - 3(5) + (3)(5)

         = 6 - 15 + 15

         = 6

5 * 3 = 2(5) - 3(3) + (5)(3)

         = 10 - 9 + 15

         = 1 + 15

         = 16

 

3 * 5 + 5 * 3 = 6 + 16 = 22 

 

The answer is B.

 Apr 27, 2021

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