A helicopter was flying at 200 feet. it then flew up 30 feet then descended 54 feet, and finally leveled of 21 feet higher. What altitude is the helicopter now?

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

Meg constructed triangle poq and then used a compass and straightedge to accurately construct line segment os, as shown in the figure below, which could be the measures of angles pos and angle poq?

What is the mean of the data set 125, 141, 213, 155, 281