Find the unknown number in the proportion. Write your answer as a whole number or a mixed number if possible.
= 
A. x = 7
B. x = 1
C. x = 
D. x = 
Answer: A
Mathematics
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Find the distance d(A, B) between the points A and B.A(6, -6); B(4, -2)
A. 2
B. 6
C. 12
D. 12
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Find dy/dt.y = 4t(2t + 5)3
A. 4(2t + 5)2 B. 4(2t + 5)3(5t + 5) C. 4(2t + 5)2(8t + 5) D. 4(8t + 5)2
Mathematics
Fill in the blank.The measure of an obtuse angle is 
.
A. 180° B. 90° C. between 0° and 90° D. between 90° and 180°
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The nth term of a sequence is given. Find the first 4 terms.an = (-1)n-1(8n - 4)
A. 4, 12, 20, 28 B. 4, -12, 20, -28 C. 4, -20, 20, -28 D. -4, 12, -20, -28
Mathematics