Which is set to ring whenever the system temperature rises above –10° c. what fahrenheit value should you write on the label?

Whenever you need to convert a temperature expressed in celsius degrees to fahrenheit degrees, you have to use the following formula:

So, if we plug the celsius temperature of -10, we get

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