Question

Which of the following points are not solutions of 2y-5x>6?

I. (-3,4) II. (5,-5/3) III. (3/4,5) IV. (2.6,5)

A. I and II B. III only C. II and IV D. III and IV

Answer 1

answer is C. II and IV not solutions


(-3,4)....2y-5x = 2(4) - 5(-3) = 8 + 15 = 23 > 6 True

(5,-5/3)....2y-5x = 2(-5/3) - 5(5) = -10/3 -25 = - 28 1/3 > 6 False

(3/4,5)....2y-5x = 2(5) - 5(3/4) = 10 -15/4 = 10 - 3.75 = 6.25 > 6 True

(2.6,5)....2y-5x = 2(5) - 5(2.6) = 10 - 13 = -3 > 6 False