1: Marty owes his friend $10 Positive Or Negative

2: An office is in a building 5 floors above ground level.

Positive or Negative

3: The temperature is 12 degrees below 0°C.

Positive or Negative

4: A cave is located 22 feet below sea level.

Positive or Negative

step-by-step explanation:

12475909

- "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."

6 cm

step-by-step explanation: