PLS HELP ME WITH # QUESTIONS, WILL GIVE BRAINLIEST! pls i really need your help

Step-by-step explanation:

5. x <= -1/4 or x > 3

6. x <= -6 or x > 1

7. -5y <= 10-x

y > = 1/5x -2 (you reverse inequality when dividing by a negative number)

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18