For every bag of trail mix the local scout guide troop sells, they earn $0.45.
a. write an expression to represent this situation.
b. sarah sold 52 bags of trail mix. how much did she earn for her troop ?
c. let x represent the total number of bags of trail mix sold by sarah's troop. write an expression to show what percentage of bags sarah sold.

step-by-step explanation:

i hate black

- "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."