Which is the intersection of the sets {1,4,8,9} and {2,4,7,9,11}? a. null set b. {4,9} c. {1,2,7,8,11} d. {1,2,4,7,8,9,11}

answer: was that a question or answer?

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