Which statement explains why 30 is considered an irrational number

One of the complementary angles is 4 degrees mor than the other. find the angles (recall that complementary angles are angles whose sum is 90 degrees.) which of the following can not be used to solve the problem if x represents one of the angles? a. 2x-4=90 b. 2x+4=90 c. x+4=90

The equation of a parabola is given. y=18x2+4x+20 what are the coordinates of the focus of the parabola?

If the probability of an event happening is 65% then the probability this event does not occur?