0.800 is already rounded to the nearest tenth
tan A = 2/7 (option C)
Explanation:
Angle = A
opposite = side opposite the angle = BC
opposite = 2
adjacent = AC
AC = 7
hypotenuse not given
Since angle C is a right angle, we would apply trigonometry ratio SOHCAHTOA
We are looking for tan A, tan ratio (TOA):

I hope this helps. You can use quadrant first before the other method(first one) because the first one looks for the discriminant.
Answer:
k = 
Step-by-step explanation:
Can i have Brainllest
Answer:
C. Only Henry's proof is correct.
Step-by-step explanation:
Amy's "proof" leaves out the steps that Henry's proof puts in. Only Henry's proof is correct.
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Amy's proof has no reasoning to support her "therefore ..." and no reasoning to support her conclusion that angles 4 and 2 are equal. Nothing in her proof supports her conclusion that the transitive property of equality can be applied.