Which choice is a graph of the solution set for 12 - X < 8?
Please help NUMBER 14

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?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

What are the solutions of the equation? 16x^2 + 24x + 5 = 5 a. 1/4, 5/4 b. -1/4, -5/4 c. -1/4, 5/4 d. 1/4 , -5/4