A. I’m not sure what this is asking but I’d guess 8,9,10
B is 19,20,21
C is there is none
8/13 = 0.6153
y = cos-1(0.6153)
y = 52.0
I'm not totally sure if this is what you mean or if this is.
y = cos(8/13) = 0.9999 which to the nearest tenth is 1.0
I believe your answer is going to be -6 7/3. Reciprocals are the opposites of a number, so I switched the sign on the 6 and made it -. When dealing with fractions, the reciprocal is essentially just flipping the numerator and denominator, which is how I got 7/3.
I hope I helped. Best of luck!
Answer:
The answer is ten. Perimeter is all the sides added together. Area is length times width.
Step-by-step explanation:
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