Question

A and B have coordinates –2 and 10 on a number line. If it is marked off into 10 congruent segments, which one of the following coordinates is NOT one of the marked points? a. –0.8 c. 1.6 b. –0.6 d. 2.8

Answer 1

Your answer will be D

Answer 2

b. - 0.6

Explanation:

Since, the total coordinates from -2 to 10 = 10 - (-2) = 10 + 2 = 12,

Also, if it is divided into 10 congruent segments,

Then, the length of each segment =
`(12)/(10)` = 1.2,

That is, the difference between the marked point is 1.2,

So, the marked points from -2 to 10 are,

-2, -0.8, 0.4, 1.6, 2.8, 4.0, 5.2, 6.4, 7.6, 8.8, 10,

Hence, except -0.6 all points are the marked points,

Option b is correct.