Agood conductor transfer heat easily

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

With this question substitute t=3 and t=5 to determine if the two expressions are equivalent. 4(t + 3) 4t+12 which statements are true? check all that apply. a. the value of both expressions when t =5 is 32. b. the two expressions are not equivalent. c. the value of both expressions when t=3 is 15. d. the value of both expressions when t=5 is 23. e. the two expressions are equivalent. f. the value of both expressions when t=3 is 24.

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83