Can someone pls answer this and explain it? thank you

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.

Deepak plotted these points on the number line. point a: –0.3 point b: – 3 4 point c: – 11 4 point d: –0.7 which point did he plot incorrectly?