Factor completely.7x2 - 21xy - 28y2
A. (7x - 7y)(x + 4y)
B. 7(x + y)(x - 4y)
C. prime
D. 7(x - y)(x + 4y)
Answer: B
Mathematics
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Without using a calculator, determine the value of the trigonometric function or state that the value is undefined.cot 
A. 
B. - 
C. - 
D. 
Mathematics
Solve the problem.The student population of a small school has been increasing as shown in the following table.
Take 1900 as year zero, and determine the linear, quadratic, or cubic function that best fits the data.
A. f(x) = 5x - 93.33 B. f(x) = 0.1x2 - 10x + 440 C. f(x) = x3 - 0.1x2 - 10x + 440 D. f(x) = 0.002x3 - 0.44x2 + 28.19x - 427.30
Mathematics
Multiply.(2 + 
)2
A. 5 + 4
B. 4 + 4
C. 7 + 2
D. 7 + 4
Mathematics
Write the given number in the situation as an integer.The temperature outside is 88 degrees Fahrenheit.
A. -88 degrees B. 88 degrees
Mathematics