Which set of ordered pairs is NOT a function ? {(3, 2) (4, 1) (5, 2) (8,8) }
{(3, 6) (2, 1) (6, 2) (5,9)}
{(7,3) (8, 2) (3,6) 7,4)}
(4.4) (5, 4) (1,4) (7,4)}

Which shows one way to determine the factors of  x3  +  5x2  –  6x  –  30 by grouping? x(x2  –  5)  +  6(x2  –  5)x(x2  +  5)  –  6(x2  +  5)x2(x  –  5)  +  6(x  –  5)x2(x  +  5)  –  6(x  +  5)

Acompany manufactures large valves, packed in boxes. a shipment consists of 1500 valves packed in 75 boxes. each box has the outer dimensions 1.2 x 0.8 x 1.6 m and the inner dimensions 1.19 x 0.79 x 1.59 m. the boxes are loaded on a vehicle (truck + trailer). the available capacity in the vehicle combination is 140 m3. each valve has a volume of 0.06 m3. - calculate the load factor on the box level (%). - calculate the load factor on the vehicle level (%). - calculate the overall load factor (%).

The equation of a parabola is given. y=18x2+4x+20 what are the coordinates of the focus of the parabola?