Helpp please with all four questions

Solve the inequality and graph 6j - 7 < 5

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

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?