3 years ago

Help! 10 Points not 5!

Mathematics

1 answer:

KATRIN_1 [288]3 years ago

6 0

9514 1404 393

Answer:

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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