Multiply.(3x - 1)(x + 9)
A. 3x2 + 25x - 9
B. x2 - 9x + 26
C. x2 + 26x + 25
D. 3x2 + 26x - 9
Answer: D
Mathematics
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Which of the following is the reflection, on a coordinate system, across the y-axis, for the point: (-2, 9)? ?
A. ?(2, -9) B. ?(-2, -9) C. ?(2, 9) D. ?(-2, 9) E. ?None of the above.
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Power regression always applies to data that are not exponential.
Answer the following statement true (T) or false (F)
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Find the unit tangent vector T and the principal unit normal vector N. r(t) = 
(1 + t)3/2i + 
(1 - t)3/2j + 
tk
A. T = 
i + 
j + 
k; N = 
i + 
j
B. T = 
i - 
j + 
k; N = 
i + 
j
C. T = 
i - 
j + 
k; N = 
i + 
j
D. T = 
i - 
j + 
k; N = 
i + 
j
Mathematics
Find the average value of the function over the given interval.f(x) = 2x + 14 on [-7, 7]
A. 7 B. 14 C. 196 D. 28
Mathematics