exam Maths Puzzle Numerical Ability

Determine which two equations represent parallel lines. Show work.
(a) y=6x-5 (b) y=-6x+5 (c) y=6x+1 (d) y=-1/6x-5

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exam Other Question

15. The sum of the digits of a two-digit number is 11. If the digits are reversed, the new number is 27 less than the original number. Find the original number. If the product of 3 and x is equal to 2 less than y which of the following must be true?

A. 6x-y-2=0
B. 6x-6=0
C. 3x-y-2=0
D. 3x+y-2=0
E. 3x-y+2=0
Explain