Dude tbh, I’m on the same problem as you and I need help with the answer.!!
Answer:
The first one.
Step-by-step explanation:
Both of the equations in the parenthesis have the same value, and 1/2 isn't as much as a whole.
A -120 difference will be seen in the temperature within a 7 hour period
<u>Equation</u>
<em>-</em>30 x 7
<em>Multiplying two of different signs ( - + , + - ) will always be negative.</em>
<em>Multiplying two of the same sign ( - - , + + ) will always be positive.</em>