Sally is painting the rooms in her bed and breakfast. If she painted 3x - 4 walls on Friday, -2x + 13 walls on Saturday, and 3x walls on Sunday, how many walls did she paint the whole weekend?

huh? im pretty sure it is in 199

step-by-step explanation:

none cuz there are no "following statements" regarding the question

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