find the least common denominator for the following rational expressions.
18/r-4 5r/r^2-5r+4 r+7/r^2-4r-5
(r-1)(r-4)(r-5)
(r- 1)(r + 4)(r-5)
(r-1)(r + 1)(r – 4)(r-5)
(r- 1)(r+ 1)(r + 4)(r-5)

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a seven or king. (b) compute the probability of randomly selecting a seven or king or jack. (c) compute the probability of randomly selecting a queen or spade.

Drag the tiles to the correct boxes to complete the pairs. not all tiles will be used. the heights of the girls in an advanced swimming course are 55, 60, 59, 52, 65, 66, 62, and 65 inches. match the measures of this data with their values.

I’m which figure is point g an orthocenter