the mean number of hours spent per day on the computer, according to a national survey, is six hours, with a standard deviation of 2.5 hours. if each time was increased by 1.5 hours, what would be the new mean and standard deviation? (2 points)

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a diamond or heart. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability of randomly selecting a diamond or heart or club. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability of randomly selecting queen or club. (type an integer or a decimal rounded to three decimal places as needed.)

Use matrices to solve this linear system: 5x1 − 2x2 = −30 2x1 − x2 = −13 x1 = x2 =

Select the term that describes the linear portion in this quadratic equation 7x^2-12x+16=0 a) -12x b) 7x^2 c) 16