The question is, "how many ways ...". 
There are as many ways to solve a math problem as you can think of. (Some are shorter or easier than others.)
Essentially, an infinite number.
        
             
        
        
        
Complete Question:
Triangle abc has the angle mesausres shown. 
m<A = (2x)°
m<B = (5x)°
m<C = (11x)°
Which statement is true about the angles?
A. m<A = 20°
B. m<B = 60°
C. m<A and m<B are complementary
D. m<A + m<C = 120°
Answer:
A. m<A = 20°
Step-by-step explanation:
m<A + m<B + m<C = 180° (sum of interior angles of a triangle)
 (substitution)
 (substitution)
Solve for x. Add like terms.

Divide both sides by 18


Find the measure of each angle by substituting x = 10:
m<A = (2x)° = 2(10) = 20°
m<B = (5x)° = 5(10) = 50°
m<C = (11x)° = 11(10) = 110°
Therefore, the only true statement is:
A. m<A = 20°
 
        
                    
             
        
        
        
Answer:
7x
Step-by-step explanation:
It equals 28 just like the problem with parentheses, 7x .
 
        
             
        
        
        
From the circle geometry theorem, a tangent to a circle makes 90° angles with the radius of the circle.
 RQ is perpendicular to QP
Triangle RQP is a right-angled triangle
by Pythagoras theorem

 units (rounded to one decimal place)