Answer:
D. Maya is incorrect because she listed the runners from least improved to most improved. Runners that decreased times are improving, and those that add time are not improving.
Step-by-step explanation:
I got it right on edge
Answer:
4
Step-by-step explanation:
you take the two and add it the the two
Thanks for the free points hope you find your awnser!
Answer:
3a. 7.2
3b. 0.9
4a. 7.2
4b. 2.4
5a. 104
5b. 260
hope this helps, everything in bold is the correct answer,
have an awesome day, -TJ
Answer:
see explanation
Step-by-step explanation:
Using the double angle identity for sine
sin2x = 2sinxcosx
Consider left side
cos20°cos40°cos80°
= 
(2sin20°cos20°)cos40°cos80°
= 
(2sin40°cos40°)cos80°
= (sin80°cos80° )
= 
(2sin80°cos80° )
= . sin160°
= . sin(180 - 20)°
= . sin20°
= 
= right side , thus proven
