You can just divide each total earning by hours of work
A=12
B=10.5
C=13
It's the first one (12, 15, 15, 17, 19, 19, 20, 22, 24)
Answer:
a. (2 - x, -4 - 1/2y)
Step-by-step explanation:

Simplify to get the answer.
Answer: A=100(12)t5.27
Step-by-step explanation:
Assume / and ^ got lost from eqns.
A(t) = initial × (1/2)^(t/halflife)
So initial = 100, halflife = 5.27,
A=100(12)t5.27 means A=100(1/2)^(t/5.27)
so that A is 50 when t is 5.27