Discrete math homework:
which one of the following would disprove the conjecture that the sum of two irrational numbers is irrational?
a) the fact that ? + 2, which is the sum of ? and 2, is irrational.
b) the fact that each of ? + 2 and 5 - ? is an irrational number and that their sum is 7.
c) the fact that each of 2 ? - 2 and 2 - ? is an irrational number and that their sum is ? .
d) none of the above
***the answer is (b). i just don't understand how.**

Find the area of a parallelogram with the given vertices. p(-2, -5), q(9, -5), r(1, 5), s(12, 5)

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

Two students were asked if they liked to read. is this a good example of a statistical question? why or why not? a yes, this is a good statistical question because a variety of answers are given. b yes, this is a good statistical question because there are not a variety of answers that could be given. c no, this is not a good statistical question because there are not a variety of answers that could be given. no, this is not a good statistical question because there are a variety of answers that could be given