While scuba diving rajeev dove to a depth of 12.6 feet below the surface of the water and then descended another 8.7 feet

what expression can be use to find rajeev new position

12.6 - 8.7

-12.6 - 8.7

-12.6 - (-8.7)

12.6 - (-8.7)

Option B is the correct answer.

Step-by-step explanation:

Scuba diving Rajeev dove to a depth of 12.6 feet below the surface of the water and then descended another 8.7 feet

Depth Rajeev dove = 12.6 feet.

Descended depth after dive = 8.7 feet

Total depth = 12.6 + 8.7

Since this is depth the sign of the position is negative.

Rajeev's new position = - ( 12.6 + 8.7) = -12.6 - 8.7

Option B is the correct answer.

step-by-step explanation:

- "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."