CAN SOMEONE HELP ME PLS

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?

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

The product of sin 30 degrees and sin 60 degrees is same as the product of