How many cards must be selected from a standard deck of 52 cards to guarantee that at least three cards of different suit are selected

Aperpendicular bisector, cd is drawn through point con ab if the coordinates of point a are (-3, 2) and the coordinates of point b are (7,6), the x-intercept of cd is point lies on cd.

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')