elimanation variations matrix
determinant: 
(a) 
D<0 means there are no real roots. there are two complex roots with imaginary components.
(b) D=16+20=36>0
D>0 means there are two real roots
(c) D = 20^2-4*4*25 = 0
D=0 means there is one real root with multiplicity 2
Answer:
D. 29
Step-by-step explanation:
180 - 151 = 29
Answer:
256 ft²
Step-by-step explanation:
4 lateral faces + 2 bases
The total area


