Answer:
What?
Step-by-step explanation:
Let x km/h be the Jim's speed. If the difference in Jim's and John's speeds is 2 km/h, then the John's speed is x+2 km/h.
1. John takes 15 minutes to walk with speed x+2 km/h from school to the bus station, then the distance is 15·(x+2) km.
2. Jim takes 20 minutes to walk with speed x km/h from school to the bus station, then the distance is 20·x km.
3. The distance is the same, so
20x=15(x+2),
20x=15x+30,
20x-15x=30,
5x=30,
x=30:5,
x=6.
Answer: the distance between the station and the school is 6 km.
Answer: True
Step-by-step explanation:
<span>3x + 3y = –9
3x – 3y = 21
-----------------add
6x = 12
x = 2
</span>3x + 3y = –9
3(2) + 3y = -9
6 + 3y = -9
3y = -15
y = -5
x = 2 and y = -5
answer: <span>C. (2, –5)</span>
Vertex: (1, -16)
Minimum value of -16 occurs at x = 1
Axis of symmetry: x = 1
Zero’s: -3 and 5
Direction of opening: up (positive)
Y-intercept: -15
