Answer:

Step-by-step explanation:
Divide both sides by 

Simplify:
; 
I think that 52 is next number
Subtraction
161616+444= 162,060
Answer:
A = 1249.5 mm²
Step-by-step explanation:
Total area is sum of area of two trapezoids
A = 13(½(28 + 35)) + 28(½(25 + 35))
A = 409.5 + 840
A = 1249.5 mm²