--what is four x over two plus three x over seven

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