Answer:
x = 8
Step-by-step explanation:
y = 4x - 2
30 = 4x - 2
+ 2 + 2
32 = 4x
/ 4 / 4
8 = x
We would find the midpoint by applying the formula for determining the midpoint of a segment which is expressed as
Midpoint = (x1 + x2)/2, (y1 + y2)/2
From the given points,
x1 = 4, y1 = - 5
x2 = 6, y2 = 1
Midpoint = (4 + 6)/2, (- 5 + 1)/2
Midpoint = 10/2, - 4/2
Midpoint = 5, - 2
The horizontal component of the velocity = 800 cos 60 = 400 m/sec
400 = distance / time = 21000 / t
t = 21,000 / 400 = 52.5 seconds Answer