If x>5 and y<-1, then which of the following statement is true?

A    (x+4y)>1

B    x>-4y

C    -4x<5y

D    none of them

Solution

Correct Answer: Option D

 

option 1: for x = 6 & y = -2, x+ 4y becomes -2 which is not greater than 1.

option 2: for x = 6 & y = -2; -4y = 8 which is not true for x>-4y

option 3: for x = 6; -4x = -24 & y can be -25 so it's not also true

 

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