Four cards are drawn from a deck without replacement. Find these probabilities.
a. All cards are jacks.
b. All cards are black cards.
c. All cards are hearts

Suppose the first five terms of a sequence are 4, 5, 9, 27, 123. how could the next term in the sequence be generated?

The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?