Jason's age is 1 2 of his brother's age. his brother's age can be represented by the expression 12a - 9. write an expression that can be used to represent the sum of their ages. a) 12a - 5.5 b) 18a - 13.5 c) 18a + 21 eliminate d) (12a-9) 2

The table shows the age and finish time of ten runners in a half marathon. identify the outlier in this data set. drag into the table the ordered pair of the outlier and a reason why that point is an outlier.

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

Is there a direction u in which the rate of change of f(x,y)equals=x squared minus 3 xy plus 4 y squaredx2−3xy+4y2 at p(1,2) equals 14? give reasons for your answer. choose the correct answer below. a. no. the given rate of change is smaller than the minimum rate of change. b. no. the given rate of change is larger than the maximum rate of change. c. yes. the given rate of change is larger than the minimum rate of change and smaller than the maximum rate of change.