12) Tonya runs a race at an average speed of 6.0 miles per hour for the first 3 laps and 4.5 miles per hour for the last 2 laps. Find Tonya's average speed for the entire race. Your answer should
contain a decimal to the hundredths place.

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

2160ft3

step-by-step explanation:

600,000,000,000, or 6e14

step-by-step explanation:

x= 3^y

step-by-step explanation: