3. Two dogs and a cat escape from their house to run 9
miles south and then 3 miles east. What is the shortest
distance, to the nearest tenth of a mile, they must
journey homeward bound before they get too lost?

i got 142 as my answer

step-by-step explanation:

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92

a reflection across the x axis and a 90 degree rotation left and right.