Um professor de matemática apresentou a sua turma o seguinte problema para ser resolvido. Jéssica ganhou uma barra de chocolate de 200g e comeu 2/4 dessa Barra no mesmo dia. Quantos gramas de chocolate dessa barra Jéssica comeu nesse dia?

45

step-by-step explanation:

smple

a. she will receive a refund of $278.

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."

step-by-step explanation: