Is there more to this problem? By saying f(4), you'd be inputting a 4 for every variable x. There is not enough info here to answer the question.
        
             
        
        
        
Answer:
135 cm²
Step-by-step explanation:
The area (A) of a trapezoid is calculated as
A =  h(a + b)
 h(a + b)
where h is the height and a, b the parallel bases
Here h = 9, a = 13 and b = 17 , thus
A =  × 9 × (13 + 17)
 × 9 × (13 + 17)
    = 0.5 × 9 × 30
    = 135 cm²
 
        
             
        
        
        
Answer:
2/6 - simplified fraction=1/3
Step-by-step explanation:
 
        
             
        
        
        
Answer:
x = 10
missing angle = 83°
Step-by-step explanation:
These are supplementary angles meaning they have a sum of 180°.
8x + 3 + 97 = 180
8x + 100 = 180
8x + 100 - 100 = 180 - 100
8x = 80
x = 10
Substitute the value for the variable.
8(10) + 3
80 + 3
83