Which equation illustrates the associative property of addition?
A. (3x+4)+5=5+(3x+4)
B. (4x+3)+0=4x+3
C. 5(3x+4)=15x+20

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .

Solve the system of equations. y= 2x y= x^2 - 15

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?