kris1920
13.05.2021 •
Mathematics
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
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Ответ:
B. 22
Step-by-step explanation:
3 * 5 + 5 * 3 = (2 * 3 - 3 * 5 + 3 * 5) + ( 2 * 5 - 3 * 3 + 5 * 3)
= (6 + 10 - 9 + 15) = 22.
Ответ:
9*9 = 81
so integer part of sqrt 70 is 8 Answer