Question

2 a meteorologist was monitoring the temperature outside in degrees fahrenheit (°f) and wrote the expression $78 + (-6) - 5$. which statement best describes this expression?
a the temperature started at $78^\circ f$ and increased by $6^\circ f$. then the temperature decreased by $5^\circ f$
b the temperature started at $78^\circ f$ and increased by $6^\circ f$. then the temperature increased by $5^\circ f$
c the temperature started at $78^\circ f$ and decreased by $6^\circ f$. then the temperature decreased by $5^\circ f$
d the temperature started at $78^\circ f$ and decreased by $6^\circ f$. then the temperature increased by $5^\circ f$

Explanation:

1. The initial value $78$ represents the starting temperature in °F.
2. Adding $(-6)$ is equivalent to subtracting 6, which means the temperature decreased by 6°F.
3. Subtracting 5 means the temperature decreased by an additional 5°F.
4. Match this sequence to the given options.

Answer:

C. The temperature started at $78^\circ F$ and decreased by $6^\circ F$. Then the temperature decreased by $5^\circ F$