Question

PLS HELP!!!!

both questions pls tyyy

Answer 1

4) j<3

5) solution:

`-23\leq k<1\\interval=[-23,1)`

Explanation:

4)
`15j+12<57\\15j+12-12<57-12\\15j<45\\(15j)/(15)<(45)/(15)\\j<3`

5)
`3>(11+k)/(4)\quad \mathrm{and}\quad (11+k)/(4)\ge \:-3\\3>(11+k)/(4)\quad : k<1\\(11+k)/(4)\quad\geq -3: k\geq -23\\k<1\quad \mathrm{and}\quad \:k\ge \:-23\\-23\le \:k<1`