For two adjacent angles with measures x° and (x + 30)° that make up a 90° angle, what is x?
A.15
B.30
C.20
D.60
To find the value of x, we can set up the equation:
x + (x + 30) = 90
Combining like terms:
2x + 30 = 90
Subtracting 30 from both sides:
2x = 60
Dividing both sides by 2:
x = 30
Therefore, the value of x is 30°.
The answer is B. 30