enorton
12.06.2020 •
Mathematics
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Ответ:
A: 21/5 B: 175/24
Step-by-step explanation:
A : 7/9 * 5 2/5 = 7/9 * 27/5 = 7/1 *3/5 = 21/5
B : 1 3/4 * 4 1/6 = 7/4 * 25/6 = 175/24
Ответ:
81 is d answer
Step-by-step explanation:
x = 9y
= > 9y + y = 90 substitution
= > y = 9
x =9y = 81 degree