Write the expression 5x(x + 9) − 7(x + 9) in complete factored form

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

Ireally don't understand this, i'm really an idiot but i want to know how to figure this out. !

Newtons second law says force(f) is equal to mass (m) times avceration (a) a scientist wamts to calculate the force of an objecy where the acceleration of gravity (g) is 9.8m/ s2 use the function to calculate the force of an object with a mass73( m) of 0.29 kilograms