Find the exact value of the indicated trigonometric function of ?.tan ? = - 
, 270°< ? < 360°Find cos ?.
A. 
B. 20
C. 
D. 
Answer: D
Mathematics
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Solve the system using matrices. x + 7y = -23x + y = 34
A. (3, 7) B. (-2, 3) C. (7, 12) D. (12, -2)
Mathematics
Evaluate the integral.
A. - 
B. 
C. ln 2
D. 
Mathematics
Provide an appropriate response.When comparing markup based on cost to markup based on selling price:
A. none of these B. markup based on cost provides more profit for the business C. when using markup based on selling price, cost can never be determined D. all else being equal, markup based on cost will result in a higher markup rate
Mathematics
Solve the problem.A telephone costs $451. If the sales tax rate is 6%, how much tax is charged and what is the total price? Round your answers to the nearest cent.
A. $270.60, $721.60 B. $22.55, $473.55 C. $27.06, $478.06 D. $31.57, $482.57
Mathematics