Una cartera contiene $5.15 en pesetas y monedas de diez. Hay 15 pesetas más que monedas de diez. Halla el número de pesetas y monedas
de diez.
monedas
pesetas Hecho

I’m stuck on this i don’t understand.

Ablock of wood is a cube whose side is x in. long. you cut off a 1-inch thick piece from the entire right side. then you cut off a 3-inch thick piece from the entire top of the remaining shape. the volume of the remaining block is 2,002 in3. what are the dimensions of the original block of wood?

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?