6b+4=2 has one variable
4+6=10 has no variable
Answer:
10.3cm
Step-by-step explanation:
h=A
b=131.84
12.8≈10.3cm
It's $7.00 for it to be an average of $8.00 so B. *took the test*
Answer: (a) 
(b) 
(c) 
(d) 
Step-by-step explanation:
Properties of exponents :
1) 
2) 
3) 
4) 
Now , we simplify the given expression using the above properties.
a) 
[By property (1)]
[∵ (+)(-)=(-)]
b) 
[By property (3)]
[∵ (-)(-)=(+)]
c) 
[By property (2)]
[By property (4)]
d) 
[By property (3)]