Find the area of the geometric figure.
A. 18 sq ft
B. 40 sq ft
C. 80 sq ft
D. 160 sq ft
Answer: B
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Solve the system by using Gaussian elimination with backward substitution or by reducing the matrix to reduced-row echelon form.-4x + 52 = 6y-2x + 3y = -2
A. (6, 5) B. No solution C. (7, 5) D. (7, 4)
Write the equation of the circle in standard form. Find the center and radius. Then sketch the graph.x2 + y2 - 12x + 32 = 0
A. (x + 6)2 + y2 = 4
(h, k) = (-6, 0), r = 2
B. (x - 6)2 + y2 = 4
(h, k) = (6, 0), r = 2
C. x2 + (y - 6)2 = 4
(h, k) = (0, 6), r = 2
D. x2 + (y + 6)2 = 4
(h, k) = (0, -6), r = 2
The temperature on a certain day as measured at the airport of a city is changing at the rate of
?
?
F/hr, where t is measured in hours, with 
corresponding to 6 a.m. The temperature at 6 a.m. was 23F. What was the temperature at 9 a.m.? Please round your answer to whole degrees.
?
A. 
B. 
C. 
D. 
E. 
Solve the equation.- 
x + 
= 
x + 
A. 
B. 
C. 
D. - 18