Answer:
Step-by-step explanation:
You need the Law of Cosines for this, namely:
where x is the missing side.
and
so
x = 18.0 or just 18
The answer for Group A. is 0.080 or 0.08
the answer for Group B. 1.07 or 1.070
The answer is x=1
x^5=1
x=5[square]1
x=1
To express a decimal number (with a finite decimal expression) in a fraction, you work like this: the numerator is the number without decimale separator (you simply pretend it's not there), while the denominator will be
, where n is the number of digits after the decimal separator.
So, in your case, the number without decimal separator is 53, and you have two digits after the decimal separator, so the fraction will be
which is irreducible.
I’m not sure but it’s either going to be b or c