Given that A, O & B lie on a straight line segment, evaluate obtuse ∠AOC. The diagram is not drawn to scale.
Please help! Person who answers will get 40 coins

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4

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