(b) let a and b are n xn matrices from which a is invertible. suppose ab is singular. what conclusion can be made about the invertibility of b? (c) let v be a vector space, and let s, and s, be subspace of v. prove or disprove that sins, is a subspace. (hint: for sets a and b, we define the intersection anb {* € a and 3 € b)

The frequency table shows the results of a survey asking people how many hours they spend online per week. on a piece of paper, draw a histogram to represent the data. then determine which answer choice matches the histogram you drew. in order here is the.. hours online: 0-3, 4-7, 8-11, 12-15, and 16-19. frequency: 5, 8, 10, 8, 7 answer for the question is in the picture! : )