I believe it is Since the square root of 9 = 3 and the square root of 16 = 4 it is known the the square root of 12 is in between 3 and 4. Really hope this helps!
Two plus the product of 5 and x
or
the product of 5 and x plus 2
or
5 times x plus two
The answer is
3 x - y + 2 = 0
Hope this helps :)
The measure of the angle is half the measure of the opposite arc.
.. ? = 78°/2 = 39°