Evaluate the expression.-
A. 17
B. Not a real number
C. -144
D. -17
Answer: D
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Find the exact area of the circle.
A. 144? sq ft B. 2304? sq ft C. 576? sq ft D. 36? sq ft
Solve.Devon purchased tickets to an air show for 8 adults and 2 children. The total cost was 
. The cost of a child's ticket was 
less than the cost of an adult's ticket. Find the price of an adult's ticket and a child's ticket.
A. adult's ticket: $16; child's ticket: $10 B. adult's ticket: $18; child's ticket: $12 C. adult's ticket: $17; child's ticket: $11 D. adult's ticket: $19; child's ticket: $13
If the sequence is geometric, find the common ratio r. If the sequence is not geometric, say so.81, 27, 9, 3, . . .
A. 
B. 3
C. 
D. 
Write the equation in terms of a rotated x'y'-system using ?, the angle of rotation. Write the equation involving x' and y' in standard form.x2 + 2xy + y2 - 8x + 8y = 0; ? = 45°
A. 3x'2 - 4
x'y' + y'2 = 0
B. x'2 = -4
y'2
C. x'2 = -4
y'
D. 2x'2 - 
x'y' + 2y'2 = 0