~~ i raised the points and i will give brainliest show your work or tell me how you got your answer it would be really ~~

what is the 48th term in the sequence:
11.5, 19, 26.5, 34, 41.5, . . ?

19 - 11.5 = 7.5

26.5 - 19 = 7.5

Difference = d = 7.5

Formula: an = a1 + d(n-1)

an = 7.5n + 4

See if the above formula is correct:

We know a1 = 19, let's prove it:

a1 = 7.5(1) + 4

a1 = 11.5

Now a2:

a2 = 7.5(2) + 4

a2 = 15 + 4

a2 = 19

Now that we know the above statement is correct, we can find 48th term:

a48 = 7.5(48) + 4

a48 = 364

//Hope it helps.

- "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."