Simplify this; c(4+3c)-0.75(c+3)

Which of the following expressions is equal to 2x^2+8

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

Can some one explain how to slove specifically, what is the value of x? 0.9(x+1.4)-2.3+0.1x=1.6 enter the answer as a decimal in the box. x= ?