Find the exact value of the expression.sec 240°
A. 
B. - 
C. 2
D. -2
Answer: D
Mathematics
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Write the augmented matrix for the system. 4x + 7y = 60 2y = 8
A. 
B. 
C. 
D. 
Mathematics
Determine whether the expression is a polynomial. If it is, state how many terms and variables the polynomial contains. Then state its degree.2x-1y-3 - 4y
A. Yes; 2; 2; 4 B. Yes; 2; 2; -4 C. Yes; 1; 1; -3 D. No
Mathematics
Use the table of integrals to find the average value of the growth function 
over the interval 
, where N is the size of a population and t is the time in days. Round your answer to three decimal places.
?
A. 1280.000 B. 3037.844 C. 1279.773 D. 2816.025 E. 2816.057
Mathematics
Add or subtract. Assume that variables represent nonnegative values.-2
- 7
+ 4
A. 112
B. -112
C. -2
D. -15
Mathematics