Identify the expression equivalent to 4(x + x + 7) - 2x + 8 - 4 by substituting x = 1 and x = 2.
a. 6x +11
b. 3[x + 7)
oc. 2(3x + 16)
d. 3x + 16

Find the midpoint m of z1=(8+5i) and z2=(12+3i)

Student representatives surveyed their classmates on their preference of a school mascot for a new school. the results are shown in the table below. which pair of samples seems most representative of student preference?

What are the solutions of the equation x4 + 6x2 + 5 = 0? use u substitution to solve.