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Three years ago, the residents of Planet 
X found a black hole leading to another galaxy. Since then, they have been leaving Planet 
X at a rate of 120 residents per year.
The following equation describes this situation:

-120*3=-360
What does -360 tell us?
Choose 1 answer:
(A) A total of 360 residents left Planet 
X in the past 3 years.
(B) 360 residents left Planet 
X each year.
(c) There are 360 residents left on Planet 
X.

Three years ago, the residents of Planet X X found a black hole leading to another galaxy. Since then, they have been leaving Planet X X at a rate of 120120 residents per year.\newlineThe following equation describes this situation:\newline1203=360 -120 \cdot 3=-360 \newlineWhat does 360-360 tell us?\newlineChoose 11 answer:\newline(A) A total of 360360 residents left Planet X X in the past 33 years.\newline(B) 360360 residents left Planet X X each year.\newline(C) There are 360360 residents left on Planet X.

Full solution

Q. Three years ago, the residents of Planet X X found a black hole leading to another galaxy. Since then, they have been leaving Planet X X at a rate of 120120 residents per year.\newlineThe following equation describes this situation:\newline1203=360 -120 \cdot 3=-360 \newlineWhat does 360-360 tell us?\newlineChoose 11 answer:\newline(A) A total of 360360 residents left Planet X X in the past 33 years.\newline(B) 360360 residents left Planet X X each year.\newline(C) There are 360360 residents left on Planet X.
  1. Breakdown of Equation: The equation given is 120×3=360-120\times3=-360. Let's break it down.\newline120-120 represents the rate at which residents are leaving Planet X per year.\newline33 represents the number of years that have passed.\newlineMultiplying these together gives us the total number of residents that have left.
  2. Calculation of Total Residents Leaving: Now, let's do the calculation: 120-120 multiplied by 33 equals 360-360. This means that over the course of 33 years, a total of 360360 residents have left Planet X.
  3. Verification of Total Residents Leaving: So, 360-360 tells us the total number of residents that left Planet X over the past 33 years.\newlineThis matches with option (A)(A) and not with (B)(B) or (C)(C).

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