I'm stuck on a question i'm my brother with. we need to find out if y = -x squared is linear or not.

The median of a data set is the measure of center that is found by adding the data values and dividing the total by the number of data values that is the value that occurs with the greatest frequency that is the value midway between the maximum and minimum values in the original data set that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.