The equation y=3/x is an example of

Acertain drug is made from only two ingredients: compound a and compound b. there are 3 millimeters of compound a used for every 4 millimeters of compound b. if a chemist wants to make 693 milliliters of the drug, how many milliliters of compound a are needed?

Simplify: -2x 3 (-4) x 6 x (-5) x (-3) x 9

How do you find percent change? ? i will give brainliest for the bestme i don’t understand