Evaluate the expression when a=1\4 and b=6. -8ab
2 answers:
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Answer:
<h2>20 cm.</h2>Step-by-step explanation:
We know that the permiter is defined as
Where is the longest side,
is the smallest and
is the middle side.
If then,
, where we need to find an expression for
using the law of cosines.
Replacing all expression, the perimeter is
Using a calculator, the perimeter is 20 units centimeters.
Check the answer:
This answer is correct,
x = 119