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  • 11-01-2021
  • Mathematics
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Help! 10 Points not 5!

Help 10 Points not 5 class=

Respuesta :

sqdancefan
sqdancefan sqdancefan
  • 12-01-2021

9514 1404 393

Answer:

  18

Step-by-step explanation:

Solve the first for a, then substitute into the second.

  a = 27/(5b^2)

Then ...

  (27/(5b^2))^2·b = 135

  27^2/(5^2·135) = b^3 = 27/125

  b = ∛(27/125) = 3/5

  a = 27/(5(3/5)^2) = 15

__

The expression of interest is ...

  a +5b = 15 + 5(3/5) = 15 +3

  a +5b = 18

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