Question

Plzhelpmethankyou
John drove part of a 260 km trip at 80 km/h and the rest at 100 km/h. Find the distance he traveled at 80 km/h if his total driving time was 2 h and 30 min.

I need help setting up the box/table like for
rate x time = distance

Answer 1

Here is the basic idea:
rate x time = distance
if you divide both sides by "rate" you get
time = distance/rate

you have two distances d1 (at 80 km/h) and d2 (at 100 km/h)

you have two times: t1 = d1/80 and t2= d2/100 (using time= distance/rate)

you know
t1+t2= 2.5 hrs
d1+d2= 260 km

Answer 2

you can use d1+d2= 260 to write
d2= 260-d1 (add -d1 to both sides)

that makes t2= d2/100 = (260-d1)/100 (replace d2 with 260-d1 )

and
t1 + t2 = 2.5
becomes
d1/80 + (260-d1)/100 = 2.5

only 1 unknown value d1 is left. You can (if you know algebra) solve for d1

Answer 3

I am not sure what you mean by setting up box/table, but I guess you mean how to set up the equations... and then how to solve them.