What is the acceleration of a skateboard whose speed changes from 5 km/h to 10km/h in 5 seconds

5000km/h^2

Step-by-step explanation:

a = v - u /t

v = final speed 10km/h

u = initial speed 5km/h

t = time 5secs = 5/3600 = 0.001 hr

Therefore

a = 10 - 5 /0.001

= 5/0.001

= 5000km/h^2

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11