Please help me with these 3 questions ASAP

his chances of getting a coin of higher value is 4/19

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

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

step-by-step explanation:

if im not mistaking its

step-by-step explanation: