Determine the x-intercept for the following equation: y=1/2x+8 *

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

Parallelogram efgh is a rectangle. he = 6, and fe = 8. find ge: and find fj:

On which number line are -3 and its opposite shown