Martin is considering the expression 1/2(7x+48)and -(1/2x-3)+4(x+5)​

Aline that intersects one of two parallel lines intersects the other also always sometimes never

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.  

Aphrase is shown read the phrase and give me the answer