find the positive value of k that would make he left side of the equation a perfect square trinomial x^2-kx+64
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Answer:
After 15 minutes, the temperature of both the furnaces will be same.
Step-by-step explanation:
Let be the minutes when the temperature of both becomes same.
Now, as per question:
Temperature of the furnace after minutes that is cooling at the rate of 15 degree per minute is given as:
Temperature of the furnace after minutes that is heating at the rate of 5 degree per minute is given as:
Now, equating both the temperatures, we get
Therefore, after 15 minutes, the temperature of both the furnaces will be same.