A truck covers 40 km with an average speed of 80 km/h. It then travels another 40 km with a speed of 40 km/h. What was the time taken to
complete the entire journey?

53.33 km/hr

Step-by-step explanation:

The total distance covered by car is 80 KM(40+40).

Now their are two cases:

Case 1) Distance covered 40km, speed 80km/h. Now we all know speed=Distance/ time

So Time taken is 0.5 hour.

Case 2) Now again distance covered is 40 km but speed is 40Km/h

So time taken is 1 hr

Now total distance traveled is 80KM. Total time taken is 1.5 hrs (0.5+1)

Average speed =Total Distance/Total Time

Average Speed = 80/1.5

Which is equal to 53.33km/h

3, 12, 48, 384, 1536, 6144, 24576, 98304

step-by-step explanation:

just keep timing it by 4.

none.

step-by-step explanation:

m

1

=

5

m1=5

b

=

−

1

b=-1

find the slope and y-intercept of the second equation.

tap for more

m

2

=

0

m2=0

b

=

−

6

b=-6

compare the slopes

m

m of the two equations.

m

1

=

5

,

m

2

=

0

m1=5,m2=0

compare the two slopes in the decimal form. if the slopes are equal, then the lines are parallel. if the slopes are not equal, then the lines are not parallel.

m

1

=

5

,

m

2

=

0

m1=5,m2=0