The temperature fell 10.5°f over a period of 5 hours. what was the average change in temperature per hour?

2.1 would be the average rate of change per hour.

Step-by-step explanation:

If the temperature fell 10.5 degrees Fahrenheit over a period of 5 hours then 10.5°F divided by 5 hours equals 2.1 degrees per hour.

I hope this helps!

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a