I need to know what these are simplified

What is the area of triangle pqr on the grid? a triangle pqr is shown on a grid. the vertex p is on ordered pair 7 and 6, vertex q is on ordered pair 1 and 6, and the vertex r is on ordered pair 4 and 2. 5 square units 6 square units 10 square units 12 square units

What number produces an irrational number when multiplied by -1.25

(x-5)1/2+5=2 what is possible solution of this equation