Surface area almost done ✅

Asand dune stands 5 feet’s above sea level. the hill is eroding at a rate of 1 foot per 20 years. let y represent the height of the sand dune after x years which equation represents the situation

In the triangle abc< angle c is a right angle. find the value of the trig function indicated. find tan a if a =12, b=5 a. 13/12 b. 12/13 c. 5/12 d.12/5

What is the reflection image of (5,-3) across the line y = -x?