Plz help :) Which of the equations below represents a line perpendicular to the x-axis? A. x=3 B. x=3y C. x=y D. x=-3y

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota

Which account has the highest effective annual interest rate? not necessary but show how you got your answer.a. account 1: interest is compounded quarterly at an annual rate of 4.20%.b. account 2: interest is compounded monthly at an annual rate of 4.15%.c. account 3: interest is compounded semiannually at an annual rate of 4.10%d. account 4: interest is compounded annually at a rate of 4.25%.