exam Maths Puzzle Numerical Ability

What is the relationship between y=4x+24 and 2y=8x+12? Are they perpendicular, parallel, or neither? Please answer as soon as possible. Thank you!!

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exam Other Question

-5x+3y=30

x-intercept:
y-intercept:
Hi,I was wondering if I was doing this problem correctly.
3/4 (three fourths) times the sqrt of negative 144
The answer I got was 108i, is that correct?
Thank you for your time.