4) y + 9 - x; use x = 1, and y=3
i need with this whats the answer

Which statement about the relative areas of triangle abd and triangle xyz is true

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6