*answer quickly! this is timed! * which system of equations can be graphed to find the solution(s) to x2 = 2x + 3? a: y= x^2 + 2x +3 y= 2x + 3 b: y = x^2 -3 y= 2x + 3 c: y=x^2-2x-3 y=2x +3 d: y= x^2 y=2x+3this question doesn't need to be answered anymore. but for those who need the answer, the answer is d: y= x^2 y=2x+3

- "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."