math check this please
posted by james .
1. 3t<9=t<3
2.4m>8=m>2
3.10<2w
5<w
4.20>5c
4>c
5.27>3z
9>z
6.7b>42
b>6

(1) Correct
(2) Correct
(3) 10 < 2w
Divide both sides by 2. When you divide by a negative number in an inequality, you must flip the sign.
5 > w
w < 5
Correct
(4) 20 > 5c
Divide both sides by 5 and flip the sign.
4 < c
c > 4
Incorrect
(5) 27 > 3z
9 > z
z < 9
Correct
(6) 7b > 42
Divide both sides by 7 and flip the sign.
b < 6
Incorrect
All are good except 4 and 6. 
4. 4>c
6. b>6 
No, those aren't correct. What are you saying? Do you have questions?

4.4>c
6.b>6 
No, they are not... ??

I need to know what is 4.72 in expanded form please