Simplify the algebraic expression.6b - 7b
A. 12b
B. -b
C. -12b
D. b
Answer: B
Mathematics
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Find the indicated vector.Let u = 
. Find -2u.
A. 
B. 
C. 
D. 
Mathematics
Evaluate the expression.(-5)(-3)(6)
A. -90 B. 90 C. 190 D. 80
Mathematics
Factor completely. If the polynomial is prime, state so.x8 - 1
A. prime B. (x2 - 1)(x2 + 1)(x4 + 1) C. (x - 1)(x + 1)3(x4 + 1) D. (x - 1)(x + 1)(x2 + 1)(x4 + 1)
Mathematics
Solve the problem.The change in a certain engineer's salary over time can be approximated by the linear equation 
where y represents salary in dollars and x represents number of years on the job. According to this equation, after how many years on the job was the engineer's salary $55,000?
A. 7 years B. 6 years C. 4 years D. 5 years
Mathematics