Answer:

Step-by-step explanation:
a = 3, b = 5, c = 1
plug into quadratic formula
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Answer: 3/5
Collect like terms
(2x-x) + (9+3)
Simplify
x+12
Divide 84.87 by 1.15, and you get 73.8
Then you can check your work by multiplying 73.8 by 1.15 and you get 84.87
Answer:
-7-a
Step-by-step explanation:
2a-3a +5-12
-a - 7
or -7-a