Write the given Chinese numeral as a Hindu-Arabic numeral.
A. 840
B. 540
C. 940
D. 640
Answer: D
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Express the given expression in simplest form with only positive exponents.(x9y-8z-5)(x-2y-3z8)
A. 
B. 
C. x7y11z3
D. 
Provide an appropriate response.Solve the quadratic equation using the quadratic formula: 25x2 = 9
A. x = 
i, - 
i
B. x = 
, - 
C. x = 
, - 
D. x = 
, - 
Solve the problem.Raul, who is 1.98 m tall, wishes to find the height of a tree. He walks 19.03 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. He is now 7.45 m from the end of the shadows. How tall is the tree? Round to the nearest hundredth.
A. 3.25 m B. 7.04 m C. 5.06 m D. 0.78 m
Determine the vertex of the parabola.y = 
(x + 4)2 - 2
A. (2, 4) B. (4, -2) C. (-4, -2) D. (-2, -4)