Factor.7x2 - 7x - 42
A. 7(x - 2)(x + 3)
B. (7x + 14)(x - 3)
C. 7(x + 2)(x - 3)
D. 7x2 - 7x - 42
Answer: C
Mathematics
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Use the given information to find the exact value of the expression.sin ? = 
, ? lies in quadrant I, and cos ? = 
, ? lies in quadrant I
Find cos (? + ?).
A. 
B. - 
C. 
D. 
Mathematics
Graph the function. Show at least one period.y = 3 sec
A. 
B. 
C. 
D. 
Mathematics
Write the appropriate rotation formulas so that in a rotated system the equation has no x'y'-term.13x2 - 6xy + 7y2 - 8x + 8y = 0
A. x = 
x' - 
y'; y = 
x' + 
y'
B. x = 
(x' - y'); y = 
(x' + y')
C. x = 
x' - 
y'; y = 
x' + 
y'
D. x = -y'; y = x'
Mathematics
Use the distributive property to write the expression without parentheses. Then simplify, if necessary.9(x - 6)
A. 9x - 15 B. 9x - 6 C. 9x - 54 D. 9x + 54
Mathematics