In the periodic table, how are elements in the same group related to each other?
A. They have the same atomic mass.
B. They have very different properties.
C. They have the same atomic number.
D. They have similar properties.

What are the solutions for the following system? -2x^2+y=-5 y=-3x^2+5

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?

If point a= (10,4) and b= (2,19) what is the length of ab 17 units 15 units 23 units 12 units