A gym holds one 60 minute exercise class and some weekday classes that are 45 minutes each. Last week all of the classes lasted a total of 285 minutes. Write an equation you can use to find
the number of weekday classes. S

3; 9 is 8 to -4

step-by-step explanation:

hope it you

step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2