Answer:
Step-by-step explanation:
slope, m = (6-0) /(0--2) = 6/2 = 3
intercept, c at y = -2 when x = 0
Equation
y = mx + c
y = 3x -2
Average speed = total distance divided by total time.
In the first part, the car covered 490 km in 7 hours, but I think you mistyped the second part (“then covers a speed of 90km”) and a critical piece is missing to find the total distance and time.
The last one is incorrect. The correct answer is division. They divided 9 on both sides.
Solving for x
-15x+20y=60
-15x=60-2y
x= (-4+4/3)
x=(-8/3) Answer
