Answer:
64 
Step-by-step explanation:
the expression is 
x² - 16x + _
the constant term is the square of the number residing with x divided by 2 
the number number x = 16 
therefore the constant term is (16/ 2)²
= 8²
= 64
the formula being used here is 
(x + a)² = x² + 2ax + a² 
 
        
             
        
        
        
7cos(x) + 1 = 6sec(x)
7cos(x) + 1 = 6/cos(x) 
7cos^(x) + cos(x) = 6 
7cos^(x) + cos(x) - 6 = 0 
[7cos(x) - 6][cos(x) + 1] = 0
cos(x) = 6/7 , x = arccos(6/7) and 
cos(x) = -1, x = 180
        
             
        
        
        
9. 31 + 5 = 36
10. 16 - 4 = 12
12. 9
13. 44 + 34 = 78
14. 101 - 1 = 100
15. -539 ??? 
16. 15 ??
17. |-435| = 435
        
             
        
        
        
Answer:
Solution given:
For rectangle
length [L]=BC=16in
breadth [b]=AB=4in
For traingle
length[l]=8in
breadth [b]=3in
total area =area of rectangle ABCD+2×area of triangle DEF
=L×b+2×1/2×[b×h]
=16×4+8×3=88in² is your answer