Joey and Emily's teacher gave them each a triangle divided into three parts-A, B, and C-which looked like the triangle shown below. They were told to cut the pieces apart and rearrange them into a figure that will prove that the sum of the
interior angles of a triangle is always equal to 180°.

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

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.

If the scale factor between two circles is 2x/5y what is the ratio of their areas?