Dominio:
(−∞,∞),{x|x∈R}
Rango:
(−∞,∞),{y|y∈R}
A+b+8 = 11-3c
a+b+3c = 11-8
a+b+3c = 3
a = b-1
c = b+1
b-1+b+3*(b+1) = 3
2b-b+3b+3 = 3
4b = 3-3
4b = 0
b = 0
a = b-1
a = 0-1
a = -1
c = b+1
c = 0+1
c = 1
a = -1, b = 0, c = 1
A=25 is the area of a kite. Hope that helps :)
-P
He's right because if you chose woodland to stay for 4 nights it would cost you 220$ and if you chose campgrounds it would cost you 140$.