The cost of company 1: 10x+50
The cost of company 2: 8x+60
The cost will be the same at:

The answer is 5 hours
Answer:
3.5
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Answer:
The bulb will last less than 800 hours is 0.550
Step-by-step explanation:
You have a 1/3 chance each time you role
So 1/3 x 12 = 4 times that you would role a 5 or a 6