Complementary angles equal 90 degrees true or false

Need solving this second acceleration problem.

Δabc is dilated by a scale factor of 3 with the origin as the center of dilation to form δa′b′c′. the slope of is -1.2. the length of is p units, the length of is q units, and the length of is r units. the slope of is . the length of is units.

1/2+1/6-3/4 simplify the given expression leaving the answer in improper fraction form.