Classify the pair of angle Then find the value of x I know it’s a vertical angle, I just need to know what the answer

Astudent was asked to find the square of 7x+3. the student quickly wrote (7x+3)^3= 49x^2+9. identify the student's error and provide the correct answer.

Which point does not lie on the graph k(x) = 8 -3 √x a. (-64, 12) b. (125, 3) c. (343, 1) d. (8, 5)

The quotient of 15 and a number is 1 over 3 written as an equation