Find the domain and range in interval and inequality notation

Describe [7, 13] using an absolute-value inequality.

A doctor has found that, over the years, 95% of the babies he has delivered weighed x pounds, where |x-7.8|≤1.5. What range of weights corresponds to this inequality? ... The range of weights that corresponds to the given inequality is (Simplify your answer. Type your answer in interval notation. Use integers or decimals for any numbers in the expression.) an example Get more help In

If both sides of the inequality -3x < 30 are divided by -3, do you reverse the direction of the inequality symbol? Why or why not?