Evaluate the expression.12 + (5 ? 2 + 20) ÷ 5
A. 26
B. 15
C. 19
D. 18
Answer: D
Mathematics
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Find d2y/dx2 without eliminating the parameter.x = cot t - 3, y = 11 csc t - 2, 0 < t < ?
A. 
B. 11 sin t cos2t
C. 11 sin3t
D. 
Mathematics
In a 45°–45° triangle, the hypotenuse is always this multiple of the leg lengths.
(a) 2 (b) 2 ?2 (c) ?2 (d) ?2/2
Mathematics
Use the statistical display to answer the question.The midterm test scores for the seventh-period typing class are shown below on a dot plot. 
What are the low and high scores?
A. 69; 98 B. 56; 89 C. 50; 100 D. 56; 98
Mathematics
Graph the parabola.x = (y + 2)2
A. 
B. 
C. 
D. 
Mathematics