A train travelled from city a to city b for the first 14 hours, it travelled at an average speed of 120 km/h. for the next 10 hours it traveled at an average speed of 90 km/h what was the average speed of the whole journey?

107.5

Step-by-step explanation:

120 x 14= 1680

90 x 10= 900

Now you add 1680+900= 2580

Then you divide the distance (2580) between the speed (14+10)

2580/24= 107.5

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,

won't that be plagrisim thought?

step-by-step explanation: