Percent change = ((new value) - (old value))/(old value) × 100%
= (30 - 32.5)/32.5 × 100%
≈ -8%
Explanation:
Since we have given that
Speed at which Eugene walked all the way to school = 3 mph
After realizing that she forgot her math book, she ran back
Speed at which Eugene walked back to her house = 7 mph
Let the distance between her house and her school be x
According to question,
Hence,
2y= 3x + 5
That’s your answer
The answer is x= -17
hope this helps