Use the given vectors to find the value of the indicated scalar.u = -2i + 7j, v = -7i + 5j; Find (-5u) ? v.
A. -35
B. -245
C. -15
D. 295
Answer: B
Mathematics
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Solve the inequality. Write the solution in interval notation and graph the solution set.8 - 3(2 - x) ? -7
A. [-3, ?)
B. (-?, -2]
C. (-?, -3)
D. (-?, -3]
Mathematics
Simplify the expression by combining like terms.9y7 + 14y7
A. Cannot be simplified B. -5y7 C. 23y14 D. 23y7
Mathematics
Simplify.-|-2|
A. 2 B. -2 C. 1 D. -1
Mathematics
Solve the problem.An experienced accountant can prepare a tax return in 13 hours. A novice accountant can do the job in 19 hours. How long will it take them to do the job working together?
A. 
hr
B. 
hr
C. 
hr
D. 
hr
Mathematics