b...............................................................................
450 chairs total
20 chairs per row
15 rows already set up
15×20=300
300 chairs already up
450-300=150
150 chairs left to set up
Answer: 0.2 or 5 one of them
Step-by-step explanation:
Answer: 69
Step-by-step explanation: the steps
1.you could put that FHG is 90 degrees and that it is a right angle.
2.you could put that FEG is half a right angle and it is 45 degree angle
*hope this helps....i try my best to answer this
