Whats the problem? just substitute. For example: 3x-5 if x=4 so what you do is this; 3(4)-5=7
The answer is A. The Associative Property, followed by the Associative Property.
It's because they want you to group stuff, not simplify them.
Answer: 51.9 degrees
Step by step explanation:
Sin(71)/35.6=Sin(x)/21.3
21.3Sin(71)=35.6Sin(x)
21.3Sin(71)/25.6=sin(x)
Sin^-1(21.3Sin(71)/25.6)=x
51.87827502 degrees=x
51.9= angle x
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