Perform the indicated operation.(3a2 - 5a + 6) + (9a - 5)
A. 7a2 + 1
B. 3a2 + 4a + 1
C. 3a2 + 8a + 11
D. 3a2 + 14a - 1
Answer: B
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Write the function in the form y = f(u) and u = g(x). Then find dy/dx as a function of x.y = cos4 x
A. y = cos u; u = x4; 
= - 4x3 sin(x4)
B. y = u4; u = cos x; 
= - 4 cos3 x sin x
C. y = u4; u = cos x; 
= 4 cos3 x sin x
D. y = cos u; u = x4; 
= - sin(x4)
Identify which of these types of sampling is used: simple random, stratified, systematic, or convenience.A market researcher selects 500 people from each of 10 cities.
A. Convenience B. Simple random C. Stratified D. Systematic
Simplify the expression by combining like terms.-2(-2y + 8) - (7y + 7) - 6y + 15
A. 9y + 15 B. -9y + 24 C. 5y + 6 D. -9y - 8
Express as a single logarithm.logcm + logcn
A. logc(mn)
B. logcmn
C. logc
D. logcm ? logcn