3N and 3N+3 are two consecutive multiples of three. a The sum of the two numbers is 141. Write down an equation to show this.
b Solve the equation to find the value of N
c Work out the values of the two initial numbers.

Step-by-step explanation:

a) 3n+3n+3=141, 6n+3=141

b) 6n+3=141, 6n=138, n=23

c) 3n and 3n+3, 3(23) and 3(23)+3, 69 and 72

30

step-by-step explanation:

idk

i hope i

- "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."