Jacqui wants to work out 3480 ÷ 5 She knows that

Jacqui writes because and

3480 ÷ 10 = 348

3480 ÷ 5 = 174 10 ÷ 5 = 2

348 ÷ 2 = 174

What mistake did Jacqui make in her method?

Jacqui mistake is that she divided wrong because 3480 divided by 5 is 696

Step-by-step explanation:

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."