Let H be the hyperplane through the points. Find a linear functional f and a real number d such that 
, 
, 
, 
A. f(x1, x2, x3, x4) = -5x1 + 2x2 - 6x3 + 5x4, d = 0
B. f(x1, x2, x3, x4) = 5x1 + 6x2 + 2x3 + 5x4, d = 10
C. f(x1, x2, x3, x4) = x1 - 2x2 - 6x3 + 13x4, d = 12
D. f(x1, x2, x3, x4) = 2x2 - x3 + 5x4, d = 5
Answer: A
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Solve the problem.Devon purchased tickets to an air show for 7 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: $19; child's ticket: $15 B. adult's ticket: $22; child's ticket: $18 C. adult's ticket: $20; child's ticket: $16 D. adult's ticket: $21; child's ticket: $17
Solve the equation.-2.1x = 24.57
A. 13.8 B. -9.6 C. -13.8 D. -11.7
The terminal side of ? in standard position contains the given point. Find the values of the six trigonometric functions of ?.(5, -12)
A. sin ? = 
cos ? = - 
tan ? = - 
csc ? = 
sec ? = - 
cot ? = - 
B. sin ? = - 
cos ? = 
tan ? = - 
csc ? = - 
sec ? = 
cot ? = - 
C. sin ? = - 
cos ? = 
tan ? = - 
csc ? = - 
sec ? = 
cot ? = - 
D. sin ? = - 
cos ? = 
tan ? = - 
csc ? = - 
sec ? = 
cot ? = - 
Solve the problem.Find the length of the unknown side of the right triangle, where a and b are the legs and c is the hypotenuse. a = 6, b = 8, c = ?
A. c = 10 B. c = 7 C. c = 9 D. c = 5