What is the area of the right triangle formed by joining the vertices P(1, -2), Q(4, 1), and R(6, -1)?

A. 12 square units
B. 5\sqrt{26} square units
C. 6 square units
D. 15\sqrt{2} square units

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Danielle earns a 7.25% commission on everything she sells at the electronics store where she works. she also earns a base salary of $750 per week. what were her sales last week if her total earnings for the week were $1,076.25?

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?