Answer:
#1
7(y+3)=5y+8
7y+21=5y+8
7y-5y=8-21
2y=-13
2y/2=-13/2
y=-6.5
I think number letter shape 14
46.5
explanation
6.022*10^23 molecules=40g.
7.00*10^23=40*7.00*10^23/6.022*10^23 g =46.5 g
210cm
Step-by-step explanation:
B=l•w
B=5•6
B=30
V=B•h
V=30•7
V=210
