Solve the system of equations.2x+ y- 
z=-26
x- 3z=-21x- 4y=14
A. (2, -4, 7)
B. (-2, -4, 6)
C. (-6, -5, 6)
D. (-2, 6, 4)
Answer: C
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Evaluate the given expression.sin-1 
A. - 
B. 0
C. 
D. 
Find the exact value of the indicated trigonometric function of ?.cos ? = 
, 
< ? < 2?Find cot ?.
A. 
B. 
C. - 
D. - 
Write a word name for the number in the sentence.The holder of the "magic number" 444,222,888,555 (which was generated during a college's lottery for distributing student housing) was eligible to choose from among the best dormitories.
A. Four hundred forty-four million, two hundred twenty-two billion, eight hundred eighty-eight, five hundred fifty-five thousand B. Four hundred forty-four billion, two hundred twenty-two million, eight hundred eighty-eight thousand, five hundred fifty-five C. Five hundred fifty-five million, eight hundred eighty-eight billion, two hundred twenty-two thousand, five hundred fifty-five D. Eight hundred eighty-eight thousand, two hundred twenty-two billion, four hundred forty-four million, five hundred fifty-five
Solve the problem.Syed, who is 1.64 m tall, wishes to find the height of a tree with a shadow 35.12 m long. He walks 21.45 m from the base of the tree along the shadow of the tree until his head is in a position where the tip of his shadow exactly overlaps the end of the tree top's shadow. How tall is the tree? Round to the nearest hundredth.
A. 2.69 m B. 2.64 m C. 1.64 m D. 4.21 m