En una tienda se le aplicó un descuento de 40% al precio P de un artículo. En otra tienda se le
aplicó un 50% de descuento al precio Q del mismo
artículo. En ambas tiendas el precio final luego
de aplicar el descuento fue de $18. ¿Cuál es la
diferencia, en dólares, entre los precios PyQ?

i think the answer is seven, for if i'm being useless °ω°

step-by-step explanation:

10.416 m/s

step-by-step explantion:

distance=100m

time= 9.6s

average speed=100/9.6

=10.416 m/s

- "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."