So this is a Pythagorean problem where
A^2+b^2=c^2
a is 2
X is b
5 is c
Plug that into the equation and get
4+b^2=25
B^2=21
B=sqrt(21)=4.6kilometer
One hundred and three million, seven hundred and twenty-seven thousand, four hundred and ninety five.
The answer is 90 degrees. Angle x and angle y form vertical angles, therefore x = y. Angle y forms a straight line with the 40° angle and the 50° angle which means that 50° + 40° + y = 180°. 90° + y = 180°. y = 180° - 90°. y = 90°. As mentioned earlier: x = y, so x = y = 90°.
Direct variation is of the form
y= mx
2x-4y = 0
2x = 4y
4y = 2x
y = 2/4 x
y =(1/2)x
which is indeed of the form y = mx
Hence, the equation does represent direct variation.
in y= mx,
the constant of variation is m
so in y = (1/2)x
the constant of variation is 1/2