Let x1; x2; x3 and x4 be independent lifetimes of memory chips. suppose that xi n(300; 102) for i = 1; 2; 3; 4 where the parameters are measured in hours. compute the prob- ability that at least two of the four chips lasts at least 310 hours.

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Which best describes the function on the graph? direct variation; k = −2 direct variation; k = -1/2 inverse variation; k = −2 inverse variation; k = -1/2

Quadrilateral efgh was dilated with the origin as the center of dilation to create quadrilateral e'f'g'h'. the quadrilateral was dilated using a scale factor of 2.5. the lengths of the sides of quadrilateral efgh are given. what is the length of side f'g'?