Solve the problem.The sum of the angles of a triangle is 180°. Find the three angles of the triangle if one angle is three times the smallest angle and the third angle is 30° greater than the smallest angle.
A. 30°, 90°, 60°
B. 21°, 63°, 96°
C. 12°, 42°, 126°
D. 12°, 36°, 132°
Answer: A
Mathematics
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Complete the magic (addition) square.Use each number 17, 18, 19, 20, 21, 22, 23, 24, and 25 once.
A. 
B. 
C. 
D. 
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Solve the equation.
?
What will be an ideal response?
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Solve the problem.Explain the error in the problem: 
and give the correct answer.
What will be an ideal response?
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Identify the opposite of the number. +529
A. 
B. -529
C. 529
D. - 
Mathematics