Rotate the coordinate axes through an acute angle ? such that the new equation in x' and y' has no x'y'-term.2x2 + 2
xy + 4y2 - 7 = 0
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: C
Mathematics
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Provide an appropriate response.The unit vectors u and v are combined to produce two new vectors 
and 
Show that a and b are orthogonal. Assume 
What will be an ideal response?
Mathematics
Solve the problem.The equation of a line is y = 
x. What is the slope of a line perpendicular to it?
A. - 
B. - 2
C. 
D. 0
Mathematics
Perform the indicated operation and write the answer in lowest terms.
+ 
A. 
B. 
C. 
D. 
Mathematics
Complete the ordered pairs. Then graph the equation by plotting the points and drawing a line through them.x = y - 6(0, ), ( , 0), (4, )
A. (0, 6), (-6, 0), (4, 10)
B. (0, 6), (6, 0), (4, 2)
C. (0, -6), (-6, 0), (4, -10)
D. (0, -6), (6, 0), (4, -2)
Mathematics