Solve the system of equations by finding the reduced row-echelon form of the augmented matrix for the system of equations.

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)

Let x = a + bi and y = c + di and z = f + gi. which statements are true?