Arlene sleeps for 7hr20min each night. How many hours does she sleep in a week? Write your answer as a mixed number,

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.

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.  

Triangles abd and ace are similar right triangles. witch ratio best explains why the slope of ab is the same as the slope of ac?