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Strike441 [17]
3 years ago
6

No.1 and no.2 how to do?

Mathematics
1 answer:
lapo4ka [179]3 years ago
5 0

81 * 1 / 27^y = 9 ^2y+1

81 * 1 / 9^3y/2 = 9 ^ 2y+1

9^3y/2 * 9 ^ (2y+1) = 81

9 ^ ( 3y/2 + 2y + 1) = 81 = 9^2

3y/2 + 2y + 1 = 2

7y/2 = 2 -1 = 1

7y = 2

y = 2/7 answer


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3 years ago
13.3 mm 16 mm 20.5 mm please find the volume of this triangular prism 20.5 and 16 are the base while 13.3 is the height.​
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2.2 × 10³ mm³

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