The probability that the card is a spade given that the card is blackblack is

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?

Two numbers have a sum of -19. one number is x. what expression represents the other number?

Write the equations in logarithmic form 9^4=6,561