Consider a system of linear equations Ax=b. Why is it essential for the coefficient matrix of the system A to have a non-zero determinant |A|≠0 in order to be able to find a unique solution that satisfies all of the equations simultaneously?

At a point on the ground 50 meters from the foot of a tree, the angle of elevation to the tree is 48°. find the height of the tree to the nearest meter.

Astore manager records the total visitors and sales, in dollars, for 10 days. the data is shown in the scatter plot. what conclusion can the store manager draw based on the data? question 3 options: an increase in sales causes a decrease in visitors. an increase in sales is correlated with a decrease in visitors. an increase in visitors is correlated with an increase in sales.

Which of the following is the result of expanding the series