Answer:
8
Step-by-step explanation:
x = 12
2(x - 8)
2(12 - 8)
2(4)
8
We first work out how much Mary will earn in one hour by doing 97.50/6.5 = 15
We then multiply this answer by 8 to work out how much she is expected to earn in 8hours
15*8= 120
So Mary will earn $120 in 8 hours
Because of the measurements, no but if you notice closely teh shape looks translated or a reflection
We can break this down by removing the parenthesis first:
-2 +
+ 5 - 
In order to continue, you have to simplify the square roots by factoring it and taking out i:
-2 +
+ 5 - 
Combine like terms:
-3 -
<-- that's the answer
Hope I helped :)