?????????????????????/ us a calculator to add up all the nub.
The first answer is going to be 15.42 (so b) and the second is going to be 10.67 (so a)
The Distributive Property. You are distributing a to x + y.
Hope this helps!
7^0=1
7^1=7
7^2=7*7=49
7^3=7*7*7=343
etc... etc...
