What happens when a positive number is subtracted from zero?

It isn't too tricky to perform operations using positive and negative numbers with zero. You follow normal addition and subtraction rules, and what zero does to the final sign depends on where the zero is. When you multiply or divide using zero, that zero just wipes out the numbers and leaves you with zero.

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Step-by-step explanation:

Change the operation from subtraction to addition and then you change the sign of the second number! it dosen't change the value

(c, 0) i might be wrong so don't put full faith on my answer

10 cm

step-by-step explanation:

if the polygon is a rectangle, then the perimeter is x+x+y+y. using the values that you gave, the perimeter is 3+3+2+2=10cm.