Answer:

Step-by-step explanation:

40 below 0 would be -40 and 20 below 0 would be -20°. So there’s a change of (increase of) 20° that day. It would also make sense if you drew a number line. You would see the interval between -40 and -20 is 20.
Answer:

Step-by-step explanation:
(I think it is )
Flip it into a fraction and get rid of the negative:
1
--
4²
(you can further simply too by changing the into 4² 16)
Answer:
this would be known as a right triangle because it has a right angle :)
Step-by-step explanation: