The median of 1,4,7,10,15 is

7

Step-by-step explanation:

arrange the numbers in order from smallest to largest

1, 4, 7, 10, 15

find the middle number which is 7

so the median is 7

=7

3/6   and 9/18

step-by-step explanation:

3< x< 5

step-by-step explanation:

|x - 4| < 1

there are two solutions, one positive and one negative.   remember to flip the inequality when taking the negative solution

x-4 < 1       x-4 > -1

add 4 to each side

x-4+4 < 1+4       x-4+4 > -1+4

x< 5                 x> 3

3< x< 5