The 1st selection is appropriate.
_____
2nd: the rotation would need to be 90° CCW
3rd, 4th: rotation or double reflection will give the original orientation. This figure is reflected an odd number of times, so has its orientation reversed.
Answer:
divide the diameter by 2
Step-by-step explanation:
Answer:
The first choice 
Step-by-step explanation:
Inverse functions are when you switch the y and x
btw f(x) is the same as y
y = 2x + 1
becomes
x = 2y + 1
solve it :)
subtract 1 from both sides
x - 1 = 2y
divide 2 from both sides

same as

so ya know it's the first choice
:)
Answer:
15 hours
Step-by-step explanation:
10 guests - 1.5 hours
1 guest - 1.5 / 10 = 0.15 hours
100 guests - 0.15 x 100 = 15 hours