True or false: sinxcosy=1/2(sin(x+y)-cos(x+y))

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?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Complete the solution of the equation. find the value of y when x equals -5. -4x - 8y = -52