Answer:
undefined
Step-by-step explanation:
slope = ((y2-y1)/2) / ((x2 - x1 )/2)
since x1 = x2
so x2 - x1 = 0
then ((y2-y1)/2) / 0 = undefined
Answer:
all nonnegative rational numbers
Step-by-step explanation:
Answer:
Changes can occur to physical properties of a substance,but the chemical composition of the substance remains the same.
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