Colin has 18 pencils. How many kids (including Colin) can share these pencils evenly?

18 kids can have 1 pencil each

9 kids can have 2 pencils each

6 kids can have 3 pencils each

3 kids can have 6 pencils each

2 kids can have 9 pencils each

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. f(x) = –√x + 3this is the correct answer