Write an algebraic expression for each quantity using the given variable.The second angle of a triangle is triple the first. The third angle of the triangle is 
smaller than the first. Use the letter x.
A. x = first angle;
3x = second angle;
40 - x = third angle
B. x = first angle;
3x = second angle;
x + 40 = third angle
C. x = first angle;
x - 40 = second angle;
3x = third angle
D. x = first angle;
3x = second angle;
x - 40 = third angle
Answer: D
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A. (-?, ?) B. (-5, ?) C. (-5, 1) ? (1, ?) D. (-5, -1) ? (-1, ?)
Write the augmented matrix for the system. 4x + 3y = 2 6y = -12
A. 
B. 
C. 
D. 
Solve.Given log b 3 = 0.8397 and log b 7 = 1.4873, evaluate log b 3b .
A. 0.8397 B. 2.327 C. 1.12 D. 1.8397
Find the standard equation of the ellipse shown in the figure. Identify the coordinates of the vertices, endpoints of the minor axis, and the foci.
A. 
+ 
= 1; V(0, ±5); U(±3, 0); F(±5, 0)
B. 
+ 
= 1; V(±4, 0); U(0, ±3); F(±
, 0)
C. 
+ 
= 1; V(0, ±4, 0); U(±3, 0); F(0, ±
)
D. 
+ 
= 1; V(0, ±5, 0); U(0, ±3); F(±4, 0)