When added, what is the simplified form of left parenthesis six plus square root of negative four end square root right parenthesis plus left parenthesis negative 15 minus square root of negative 25 end square root right parenthesis ? Write the answer in standard form, a + bi, where a and b are real numbers.

- "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."

ummm seems that u didnt post the attachement !