A store manager sends an email survey to customers who have registered at the store's website. Find and explain why the survey is biased.

Two lines that do not intersect are skew. always sometimes or never

Draw a tape diagram to represent each situation.for some of the situations,you need to decide what to represent with a variable andre bakes 9 pans of brownies.he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students

What is the value of x when x + 7 = 21?