Your friend says that the quadrilateral with vertices D(1;2), E(2;0), F(5;4) and G(6;2) is a square because it has four right angles. What is your friend's error?

The table shows the balance of a money market account over time. write a function that represents the balance y (in dollars) after t years.

1) in triangle the, what is the measure of angle t (in degrees)? 2) in triangle bat, the measure of angle b is 66∘, and the measure of angle t is 77∘.what is the measure of the exterior angle at a (in degrees)?

An archaeologist in turkey discovers a spear head that contains 53% of its original amount of c-14. find the age of the spear head to the nearest year. (5250 isn’t right)