If (x-3) is positive, which statement is TRUE ? The graph of the quadratic inequality concave downward. The discriminant is greater than zero. The solution of r is (,). x C The solution of x is (-2,3)+(3.-).

Pierre wants to make tables and chairs. he has a total of 220220 wooden boards and 760760 nails. 13 t+8 c \leq 22013t+8c≤220 represents the number of tables tt and chairs cc he can make with 220220 wooden boards. 48 t+37 c \leq 76048t+37c≤760 represents the number of tables and chairs he can make with 760760 nails.