Answer:
It is do not we're spectacles
do not wear spectacle
Step by step explanation:
20 ÷100×500= 20×5÷1= 100
therefore 100 students wear spectacles
x=56
Step-by-step explanation:
72+89+99+3x+2x=540
hard, search on internet as I don't know this
Sorry but where I live we do mg not kg
21x - 14y - 63
Here you go :D