R=4 because 20-4 = 16 and 4 times 4 = 16
Answer:

Step-by-step explanation:


Answer:
f(8)=-31
Step-by-step explanation:
since 8 replaces x in f(x), x should be substituted as 8 in the expression. From there, after you substitute, it becomes 6(1-8)+11. Simplifying that expression is now 6(-7)+11. Multiply 6 and -7, you get -42. -42+11=-31. I hope this helps :)
(D) traveled at the slowest rate.
Answer: +200 calories/day
Step-by-step explanation: