Question

please help asap please​

Answer 1

Answer:

750 km/hr

Step-by-step explanation:

Let x km/hr be the original speed of jet

time taken=4500/x

for speed= x-150km/hr

time taken= 4500/x-150

4500/x-150 - 4000/x = 1.5

4500x-4500(x-150)/x(x-150)=3/2

4500x-4500x+4500(150)/x^2-150x=3/2

4500×150x=3/2

45000=x^2-150x

x^2-150x-45000=0

(x-750) (x+600)=0

Therefore x=750km/hr

don't confuse x with into sign in certain places

hope it helps :)