Can someone please help

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?

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

Julie was able to walk 16 km through the zoo in 6 hours. how long will it take her to walk 24 km through the zoo?