400ml of squash is made by mixing 50ml of cordial with water. what fraction of the drink is water?

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /