Decide whether the relation is a function.{(1, -7), (2, 7), (5, -9), (9, -7), (11, -3)}
A. Not a function
B. Function
Answer: B
Mathematics
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Add.?-13? + 39
A. -52 B. -26 C. 26 D. 52
Mathematics
Find the coordinates of the midpoint of the line segment PQ.P(w, x), Q(x, w)
A. (w + x, w + x)
B. (wx, wx)
C. 
D. 
Mathematics
Solve the equation. Give an exact solution.log (x - 9) = 1 - log x
A. 10 B. -10 C. -1, 10 D. -10, 1
Mathematics
Perform the desired operation. Write the answer in the form a + bi.(3 + 9i)2
A. -72 + 54i B. 90 + 54i C. 9 + 54i + 81i2 D. -72
Mathematics