Well 3x is 3 times if they are together beside each other that mean they are multiplying so 3 times x plus 5times y = -5
Answer:
(4,2)
Step-by-step explanation:

68% fall within +/- 1 SD, so men above that 1 SD (165) are: (100-68)/2
32/2 = 16% above 165 and also 16% below 135