Mark knows that to use a number line to add intergers, you move right to add a positive number and left to add a negative number. he wonders if subtraction follows the same model and moves either left or right depending on what type number ( positive or negative.) is being subtracted.

if subtracting a negative number you move right but if subtracting a positive number you would move left

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square

d) 30 units^2

area of rectangle = l × b

we know,

length = 10 unit

breadth = 3 unit

applying the formula,

= l × b

= 10 × 3

= 30 unit^2

happy to

pls mark as brainliest