Evaluate each expression. If a=12, b=9, and c= 4a+2b-c to the 2nd power

Step-by-step explanation:

Substitute in a and b

4(12) + 2(9) - c^2= 0

48 + 18 -c^2=0

66-c^2 = 0

+c^2= +c^2

66 = c^2

sqr of 66 = c

it would open into a square depending on the type of envelope i’m not sure about the second part

22, 28, 34, 40, 46

b)   f(n) = 6n + 16

n = what is the number of the row ( 22 would be row 1) so if we replaced n with 1, we would get 22

c)   the 14th row will have 100 seats

(1)   (2)   (3)   (4)   (5)   (6)   (7)   (8)   (9)   (10) (11) (12) (13) (14)

22 | 28 | 34 | 40 | 46 | 52 | 58 | 64 | 70 | 76 | 82 | 88 | 94 | 100