Which set is a function
a.0,3 (3,0) (0,4) (4,0)
b.0,2( 2,0) ( 4,6) (6,4)
c.2,6 ( 3,6) (4,6) (2,0)
d.6,2 (2,0) (4,6) (6,4)

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

What is the solution set of the quadratic inequality x^2-5< or equal to 0

[15 points]find the least common multiple of the expressions: 1. 3x^2, 6x - 18 2. 5x, 5x(x +2) 3. x^2 - 9, x + 3 4. x^2 - 3x - 10, x + 2 explain if possible