Thread: Linear Systems

hey,
i dont understand this question. I tried solve it but i got lost in the middle somewhere. Could you please help me with it, please?

Kareem took 5 hours to drive 470km from Sudbury to Brantford. For part of the trip, he drove at 100km/h. For the rest of the trip he drove at 90km/h. How far did he drive at each speed?

Hello, Sadaf!

Kareem took 5 hours to drive 470km from Sudbury to Brantford.
For part of the trip, he drove at 100km/h. For the rest of the trip he drove at 90km/h.
How far did he drive at each speed?

Let = times he drove at 100 km/hr.
Then = time he drove at 90 km/hr.

He drove hours at 100 klm/hr.
. . His distance was: . km.

He drove hours at 90 km/hr.
. . His distance was: . km.

His total distance was 470 km.

There is our equation! . . .


Can you finish it now?

thank you.i get it from here=)