Solve the problem.Let u = 6i + j, v = i + j, and w = i - j. Find scalars a and b such that u = av + bw.
A. 6v -1w
B. 3.5 v + 2.5w
C. 6v + 1w
D. 0.29 v + 0.40w
Answer: B
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Multiply.4x7(-6x5 + 12x3)
A. -24x12 + 48x10 B. 24x7 C. 24x12 + 24x10 D. -24x12 + 12x3
Solve and check your answer.x - 10 = 14
A. x = -140 B. x = 4 C. x = -24 D. x = 24
Find the domain of the polynomial or rational function. Write your answer in set-builder notation.f(x) = 
A. {x|x ? -14, 4, 0}
B. {x|x ? 4, 14, 0}
C. 
D. 
Solve the problem.A professor's contract promises a 1.5% salary increase each year for 9 years. The professor has an initial salary of $25,000. The salary function is 
where t is the time, in years, since the professor signed the contract. Graph the salary function. At what values of t is f continuous?
A. 
Continuous for t?1,2,3,4,5,6,7,8,9,10
B. 
Continuous for t?1,2,3,4,5,6,7,8,9,10
C. 
Continuous for all values of t
D. 
Continuous for all values of t