Question

If a train travels (30a2 + 15a -10) kilometers in 10 hours, what is the average speed ?

Answer 1

Step-by-step explanation:

No idea dude...

Answer 2

Step-by-step explanation:

Its average speed

$= \frac{distance}{time}$

$= \frac{30 {a}^{2} + 15a - 10}{10}$

$= \frac{5(6 {a}^{2} + 3a - 2) }{10}$

$= \frac{6 {a}^{2} + 3a - 2}{2}$

$= 3 {a}^{2} + \frac{3}{2}a - 1$