Question

please answer correctly and ignore the bottom ill do that part just the top for you guys and gals please!

Answer 1

7) x ≥ -3

8) x < -8

Step-by-step explanation:

• 
  `\sf If \ u^n < a, \ then -\sqrt[n]{a} < u < \sqrt[n]{a}`

• 
  `\sf If \ u^n > a, \ then \ u < -\sqrt[n]{a} \ \ or \ \ u > \sqrt[n]{a}`

7.

`\sf -3(2x-7) \leq 39`

distribute

`\sf -6x + 21 \leq 39`

relocate variables

`\sf -6x \leq 39-21`

simplify

`\sf -6x \leq 18`

dividing both sides by (-), changes the inequality sign

`\sf x \geq -3`

8.

`\sf 4x + 9 < x - 15`

collect like terms

`\sf 4x -x < - 15-9`

simplify

`\sf 3x < - 24`

divide both sides by (+)3

`\sf x < -8`