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Three of these expressions give the distance between point A and point B on the number line
Which expression does NOT
A. |7.4-3.5|
B. |7.5+3.5|
C. |- 3.5-7.5|
D. |7.5-(-3.5)|

Three of these expressions give the distance between point A and point B on the number line Which expression does NOT A 7435 B 7535 C 3575 D 7535 class=

Respuesta :

Answer:

Option A does not give the right expression.

Step-by-step explanation:

On the number line if there are two points P(a) and Q(b) given by coordinates a and b, then the distance between those two points will be given by  

d = |a - b| ......... (1)

which is independent of the position of the points.

Therefore, if point A is at - 3.5 and point B is at 7.5, then the distance between point A and point B will be given by  |7.5+3.5| or |- 3.5-7.5| or |7.5-(-3.5)|, but not by  |7.4-3.5|.

Hence, option A does not give the right expression. (Answer)

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