Becca earns money mowing her neighbors' lawns.

the revenue for mowing x lawns is r(x) = 18x.
becca's cost for gas and the mower rental is c(x) = 5x + 20.

her profit from mowing x lawns is p(x) = (r – c)(x). what is p(x)?

Step-by-step explanation:

Given: The revenue for mowing x lawns is .

Becca's cost for gas and the mower rental is c(x) = 5x + 20

The profit from mowing x lawns is given by :-

The above  function can be written as

- "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."