Tatiana had 20 followers on insta last week. now she has 16 followers. what is the percent of change? ​

Asap i need it now choose all the answers that apply. sex-linked disorders affect males more than females affect females more than males can be carried by females, without being expressed are always expressed in males are caused by genes carried on the x and y chromosomes

How do i do this activity, is appreciated

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?