Desperate for this answer I made it 10 points because of my desperation! I need to know if this is a function or not, and the domain and range. Thanks to anyone who helps!!

Find the product of (4x + 3y)(4x − 3y). 16x2 − 24xy + 9y2 16x2 − 9y2 16x2 + 24xy + 9y2 16x2 + 9y2

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?