What is the simplified form of the expression 6c(2c-3d-4)

What is the first quartile of this data set? 10, 11, 12, 15, 17, 19, 22, 24, 29, 33, 38 a. 12 b. 19 c. 29 d. 10

If square root x = -7, then x= -49 true or false

What statement is true? 2x^2-9x+2=-1