HELP ME AND PLEASE SHOW WORK

Combine like terms to make a simpler expression 3z+z

Manuela claims that and are congruent. which statement best describes her claim? she is incorrect because the segments do not have the same orientation. she is incorrect because the segments do not have the same length. she is correct because the segments have the same length. she is correct because the segments have the same orientation.

Show all work to identify the discontinuity and zero of the function f of x equals 6 x over quantity x squared minus 36