X+y=03x-2y=10which of the following ordered pairs (x, y) satisfies the system of equations above? a) (3,-2)b) (2,-2)c) (-2,2)d) (-2,-2)

Layer r contains a well-known index fossil that is 100 million years old. based on this information and the principle of superposition, a. layers t and m are older than 100 million years, and layers x and g are younger than 100 million years. b. layers t, m, x, and g are all older than 100 million years. c. layers t and m are younger than 100 million years, and layers x and g are older than 100 million years.