Murphy is doing a duathlon which consists of a 10-mile running portion and a 40-mile biking portion. Enter an equation that shows the pace, in minutes per mile, that Murphy needs to run (r), as well as the pace, in minutes per mile, that he needs to bike (b) in order to complete the duathlon in 220 minutes.

answer:  

123455421

step-by-step explanation: easy

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

b is the right answer