Graph the inequality.3x + 5y ? 15
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Find the center of mass of a thin plate of constant density covering the given region.The region bounded by the x-axis and the semicircle y = 
A. 
= 
, 
= 
B. 
= 0, 
= 
C. 
= 0, 
= 
D. 
= 
, 
= 0
Mathematics
Determine the standard equation of the ellipse using the given graph.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Solve for the variable.0.5(80) + 0.7x = 0.6(80 + x)
A. x = 40 B. x = 90 C. x = 80 D. x = 70
Mathematics
Use the quadratic formula to find the exact solutions.4x2 - 21x - 18 = 0
A. - 
, 6
B. - 
, 12
C. -6, 
D. -3, 6
Mathematics