According to automobile association of a country, on March 27, 2009, the national average price per gallon of regular unleaded (86-octane) gasoline was $2.02, and the price of premium unleaded (91-octane) gasoline was $2.26. The cost of the blend of mid-grade unleaded gasoline (90-octane). Select a graph of the region determined by the constraints.
?
Constraints:
?
x ? 0
y ? 0
x + y = 1
86x + 91y = 90
?
A. 
B. ?
C. 
D. 
E. ?
Answer: C
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Evaluate.-(90) + (-6)0
A. 3 B. 0 C. 1 D. -2
Find the equation in standard form of the parabola described.The vertex has coordinates (6, 9), and the focus has coordinates (7, 9).
A. (y - 9)2 = -4(x - 6) B. (x - 9)2 = -8(y - 9) C. (x - 9)2 = 8(y - 9) D. (y - 9)2 = 4(x - 6)
Determine i) the domain of the function, ii) the range of the function, iii) the domain of the inverse, and iv) the range of the inverse.f(x) = 
A. f(x): D is all real numbers, R = 
;
f-1(x): D = 
, R is all real numbers
B. f(x): D = 
, R = 
;
f-1(x): D = 
, R = 
C. f(x): D is all real numbers, R is all real numbers;
f-1(x): D is all real numbers, R is all real numbers
D. f(x): D = 
, R = 
;
f-1(x): D = 
, R = 
Find the perimeter of the triangle or rectangle as indicated.Find the perimeter of the rectangle.
A. P = 18.1 m B. P = 19.6 m C. P = 11.3 m D. P = 9.8 m