Jonathan has 30 chocolates. he gives some chocolates to his friend david. he then gives sarah half the number of chocolates that he gave david and gives lily two-thirds of what he gave david. after giving away the chocolates, jonathan has 4 chocolates left. if the number of chocolates jonathan gives david is x, which equation represents the situation? how many solutions does this equation have?

x+1/2x+2/3x+4=30, which has one solution

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:

for volume, add base x height x width