Answer:
The temperature needs to decrease 71° - 50° = 21° that at least not greater than 50°F
As we know, the device decrease the temperature down 3.5° every hour, so
21 : 3.5 = 6 hour
Call x is the hours we need to wait to let the device decrease, we have
x > 6
1st. Try to make x by itself. Divide 12 on each side.
After it will look like this
x=12
Answer:
15x^2 + 14x - 8
Step-by-step explanation:
Answer:
The answer is the second one , 0=5 , no solutions .
Step-by-step explanation:
Good luck
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