Students were asked to find the difference between the positions of two sea creatures. An octopus was positioned at 180 feet below sea level. A narwhal was swimming 7 feet below sea level. Demarcus said you can find the difference with this expression: -7- (-180)

Maria said you can find the difference with this expression: -180 - 7
Who was correct, and why?

What is the difference between the positions of the two sea creatures?

i think this could be a possible answer (1 / 84) -1

good luck! : d

because they could drop even lower..

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step-by-step explanation:

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the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is