Correct answer will get Brainliest.
Peter has three pieces of wood. Board A is 7 inches long, board B is 14 inches long, and board C is 5 inches long. If the full length of each board is used, can the three pieces of wood be placed together to form a triangle?
A. yes, 14 - 7 > 5
B. yes, 5 + 7 < 14
C. no, 7 + 5 < 14
D. no, 14 - 5 < 7

C

Step-by-step explanation:

They can't form a triangle because the sum of 2 sidelengths is ALWAYS greater than the 3rd side in a triangle. Because 5+7=12<14, this means that it can't form a triangle.

- "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."