liquidmana42
07.11.2019 •
Mathematics
If 9a + 9b + 9c = 59a+9b+9c=5 ,
what is 72a + 72b + 72c72a+72b+72c?
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Ответ:
40
Step-by-step explanation:
9a + 9b + 9c = 5
Multiply the equation by 8
8*(9a + 9b + 9c )= 5*8
Distribute
72a +72b +72 c = 40
Ответ:
-58, -38, -18
Step-by-step explanation:
if for the nth term, the value is 20n-78, then for the 1st term, the value will be 20(1)-78
So we just need to use this formula for every term, starting from the 1st, until the value is no longer negative
20(1)-78 = 20-78= -58
20(2)-78 = 40-78= -38
20(3)-78 = 60-78= -18
20(4)-78 = 80-78= 2
so those are the only negative terms
cya at RSM today