Answer:
Step-by-step explanation: -4.5=a-8
1. add 8 to both sides -4.5+8= 3.5
2. since you added 8 to negative 8 you get zero so it just goes away
3. ANSWER= 3.5=a
notice, this will just be a Permutation.
you can always check your calculator also for a [ ₙPᵣ ] button.
C is the answer ... all u has to do was subtract 5 from 12 , then -11-14 , then -13-9
50 cents beacuse in 1970 it cost 50 cents in 1980 it cost 1.00