40%=0.4
0.4(20)
8(markup)
Shirt price=$20+ $8
New price=$28
They could be 28 + 29 + 30
Answer:
who
Step-by-step explanation:
Answer:
i
Step-by-step explanation:
Properties we are going to use :
1. (a^m)^n = a^mn
2. a^m : a^n = a^(m-n)
((a^-2)^-1)^-1 = (a^(-2 x -1))^-1 = (a^2)^-1 = a^-2
(a : a^-1)^2 = (a^1 - (-1))^2 = (a^2)^2 = a^4
Therefore, the expression is simplified down to a^-2 : a^4
a^-2 : a^4 = a^(-2 - 4) = a^-6.
