Simplify the algebraic expression by collecting and combining like terms.(3x - 8y + 6) - 2(-3x + 8y - 6)
A. 9x - 24y + 18
B. -6x + 16y - 12
C. -9x + 24y - 18
D. 6x - 16y + 12
Answer: A
Mathematics
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Find the unit tangent vector T and the principal unit normal vector N. r(t) = (4 + t)i + (4 + ln(sec t))j - 9k, -?/2 < t < ?/2
A. T = (cos t)i + (sin t)j; N = (- sin t)i + (cos t)j B. T = (cos t)i - (sin t)j; N = (-sin t)i - (cos t)j C. T = (-cos t)i - (sin t)j; N = (sin t)i - (cos t)j D. T = (-cos t)i - (sin t)j; N = (-cos t)i + (sin t)j
Mathematics
Provide an appropriate response.
=
A. 
B. 
C. 
D. 
E. none of the above
Mathematics
X is Binomial(2, 0.6).
Find E ( X ), Var ( X ), and SD( X ) for the given random variable
Mathematics
Determine the number of terms and identify the coefficient of each term of the expression.-8x + 6x2
A. 2; -8 B. 2; 8 and 6 C. 2; -8 and 6 D. 2; 8
Mathematics