This system has one solution y=8x+9, y=x^2+4x+13. what is the y coordinate

One positive number is 9 more than twice another. if their product is 95, find the numbers

What is the interquartile range of this data set? 2, 5, 9, 11, 18, 30, 42, 48, 55, 73, 81

Non-euclidean geometry was discovered when, in seeking cleaner alternatives to the fifth postulate, it was found that the negation could also be true a. true b. false