Solve the following system for all solutions:
(x - 2)2 + (y - 3)2 = 65
-x+y = 4

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of

Lucy is a dress maker. she sews \dfrac47 7 4 ? of a dress in \dfrac34 4 3 ? hour. lucy sews at a constant rate. at this rate, how many dresses does lucy sew in one hour? include fractions of dresses if applicable.