Answer: At least 7
Step-by-step explanation:
A good tip is to cut the same shape and fold it and count how many symmetry :)
It would be C. You would multiply X by 2 and then subtract 15.
Answer:
C. ±square root of 30
Step-by-step explanation:
Apply the square root function to both sides of the equation:

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The absolute value equation has two solutions. They match choice C.
The tangent of x is defined to be its sine divided by its cosine: tan x = sin x cos x . The cotangent of x is defined to be the cosine of x divided by the sine of x: cot x = cos x sin x .