Substitute the values of x and y into the expression -3x 2 + 2y 2 + 5xy - 2y + 5x 2 - 3y 2. match that value to one of the numbers. 1. x = 2, y = -1 9.17 2. x = 0, y = 2.5 1.665 3. x = -1, y = -3 -11.25 4. x = 0.5, y = 14 5. x = , y = -1 6. x = √2, y = √2 0.44

Mr and mrs smith buy tickets for themselves and their four children. the cost of an adult ticket is ? 6 more than the adult ticket. the total cost of the six tickets is ? 40.50 work out the cost of an adult ticket. in your working let c be the cost of the child ticket and a be the cost of the adult ticket.

An investment decreases in value by 30% in the first year and decreases by 40% in the second year. what is the percent decrease in percentage in the investment after two years

In the diagram, gef and hef are congruent. what is the value of x