Describe the difference in the number of solutions between a system of linear equations
that coincide and a system of linear equations that are parallel.
(#4)

Write each expression in exponential form and find its value. 2 x 2 x 2 x 2

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?

What is the length of the segment, endpoints of which are intersections of parabolas y=x^2− 11/4 x− 7/4 and y=− 7 /8 x^2+x+ 31/8 ?