Consider a regression problem with examples described by 2 continuous attributes, x and y. each example is sampled according to the uniform distribution on (−1,1)2 and labeled with f(x, y)=1−x2−y2. a learner’s hypothesis class is h(x, y)=ax+by+c. calculate its bias and variance as a function of x and y if the learner sees an arbitrarily large training sample.

The number of hours per week that the television is turned on is determined for each family in a sample. the mean of the data is 37 hours and the median is 33.2 hours. twenty-four of the families in the sample turned on the television for 22 hours or less for the week. the 13th percentile of the data is 22 hours. approximately how many families are in the sample? round your answer to the nearest integer.

If 2(a^2+b^2)=(a+b)^2 then, > a+b=0, > ab=0, > a=b, > 2a=b

Someone answer asap for ! the following statements are true about the coins calvin and sasha have collected. * calvin and sasha has the same amount of money. * calvin has only quarters. * sasha has dimes, nickels, and pennies * calvin has the same number of quarters as sasha has dimes. * sasha has $1.95 in coins that are not dimes. exactly how many quarters does calvin have?