Is f(x)=x^4-x^2 even or odd

About 400,000 people visited an art museum in december. what could be the exact number of people who visited the art museum?

What is the sum of these mixed numbers 2 1/8 + 4 3/8

Kayla and alberto are selling fruit for a school fundraiser. customers can buy small boxes of grapefruit and large boxes of grapefruit. kayla sold 3 small boxes of grapefruit and 1 large box of grapefruit for a total of $65. alberto sold 1 small box of grapefruit and 1 large box of grapefruit for a total of $55. what is the cost each of one small box of grapefruit and one large box of grapefruit?