Please, please, please help no need to show work!!

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12

What is the inverse of f(x) = 6x -24

The first week samantha learned to read braille, she could read 10 words per minute. in the second week she increased her speed by 20%. in the third week she increased her speed again by another 25%. how many words could she read per minute by the third week? hurry and tell me!