Find the missing angle in the triangle.Two angles are 19° and 19°.
A. 52°
B. 322°
C. 142°
D. 38°
Answer: C
Mathematics
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Using the derivative of f(x) given below, determine the intervals on which f(x) is increasing or decreasing.f'(x) = (1 - x)(9 - x)
A. Decreasing on (-?, 1) ? (9, ?); increasing on (1, 9) B. Decreasing on (-?, -1) ? (-9, ?); increasing on (-1, -9) C. Decreasing on (1, 9); increasing on (-?, 1) ? (9, ?) D. Decreasing on (-?, 1); increasing on (9, ?)
Mathematics
Decide whether the relation defines a function.
A. Function B. Not a function
Mathematics
Find the coordinates of the vertex of the parabola.y = 2x2 - 12x + 20
A. (-3, -2) B. (-2, -3) C. (2, 3) D. (3, 2)
Mathematics
Do the operation and express the answer in 
form.
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics