What construction correctly shows how to construct the perpendicular bisector of xy

Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?

Solve this riddle: i am an odd number. i an less than 100. the some of my digit is 12. i am a multiple of 15. what number am i?

Which is an x-intercept of the graphed function? (0, 4) (–1, 0) (4, 0) (0, –1)