Solve the following matrix system:
The explanation how you did it would help! Thanks in advance!

If x=-3 is the only x-intercept of the graph of a quadratic equation, which statement best discribes the discriminant of the equation?

Select the correct answer. joshua likes to read. he read 6 books when he was 6 years old. every year he doubled the number of books he read the previous year. how many total books did he read between the ages of 6 and 10? a. 60 b. 90 c.186 d.187

Find the solution of this system of equation -7x+y=-20 9x-3y=36