Simplify the expression. Assume that all variables are positive when they appear.
? 
A. 9x
B. -2x
C. 20
D. 20x2
Answer: D
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Determine whether the given ordered pair is a solution of the given system of equations.
; 
A. Yes B. No
Graph the function using its vertex, axis of symmetry, and intercepts.f(x) = x2 + 2x - 3
A. vertex (1, 4)
intercepts (-1, 0), (3, 0), (0, 3)
B. vertex (-1, -4)
intercepts (1, 0), (- 3, 0), (0, -3)
C. vertex (1, -4)
intercepts (-1, 0), (3, 0), (0, -3)
D. vertex (-1, 4)
intercepts (1, 0), (- 3, 0), (0, 3)
Solve the problem.A private shipping company will accept a box for domestic shipment only if the sum of its length and girth (distance around) does not exceed 108 in. Suppose you want to mail a box with square sides so that its dimensions are 
and it's girth is 
What dimensions will give the box its largest volume?
A. 24 in. x 24 in. x 18 in. B. 18 in. x 18 in. x 90 in. C. 36 in. x 18 in. x 36 in. D. 18 in. x 18 in. x 36 in.
Determine the standard equation of the ellipse using the given graph.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1