Question

It's was 55°F outside until the temperature increased 20°F. Which number is the additive inverse of the temperature increase?

Answer 1

55+20=75ºF
I am very confused but I'm guessing.

Answer 2

we know that

If two numbers have a sum of zero, then we say they are additive inverses

Let

x--------> the additive inverse of the increased of temperature

y--------> the increased of temperature

we know that

`x+y=0` ---------> equation

in this problem we have

`y=20\° F`

substitute the value of y in the equation

`x+20\° F=0`

Solve for x

`x=-20\° F`

therefore

the answer is

the additive inverse of the temperature increase is
`-20\° F`