Sara spent half of her allowance going to the movies. She washed the family car and earned 9 dollars. What is her weekly allowance is she ended with 12 dollars
(Two steps equations)

(if f(x)=4x^2 and g(x)=x+1, find (f o g)(x)

What is the value of the digit 1 in the number 13?

Four individuals pool money together to start a new business and agree to split the profits equally. n invests $6,000, x invests $2,000, y invests $8,000 and z invests $4,000. if the profits for the first month were $100,000, y receives than if the profits were divided in proportion to how much they invested.