Answer:
To be complement sum of angle must be 90°
But to be supplement sum of angle must be 180°
Step-by-step explanation:
........4x-y=11........
V = 20,000 - 2,000t
78.75 cm³
Volume = Width × Height × Length
V = 5 × 4.5 × 3.5
V = 78.75 cm³
