Identify the most precise name for the angle pair shown in the picture.

Which of these figures must be a rectangle?

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?

What do u have to get to pass7th grade math starr