Find the acute angle, in radians, between the lines.4x - 6y = 8 and 8x - 2y = -3
A. 0.8329 radians
B. 2.309 radians
C. 0.7379 radians
D. 0.7399 radians
Answer: C
Mathematics
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Solve the problem.A searchlight is shaped like a paraboloid of revolution. If the light source is located 5 feet from the base along the axis of symmetry and the opening is 14 feet across, how deep should the searchlight be?
A. 12.3 ft B. 2.5 ft C. 9.8 ft D. 0.9 ft
Mathematics
Find an equation for the ellipse described.Center (0, 0); major axis horizontal with length 18; length of minor axis is 16
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Find the product.(9x + 5)2
A. 9x2 + 90x + 25 B. 9x2 + 25 C. 81x2 + 90x + 25 D. 81x2 + 25
Mathematics
Perform the indicated operations.(x3 + 4xy - 9y2) - (3x3 + 9xy + y2)
A. 2x3 + 5xy - 8y2 B. -2x3 - 5xy - 8y2 C. -2x3 - 5xy - 10y2 D. 4x3 - 5xy - 10y2
Mathematics