Evaluate the expression using the given values.
+ 
x = 4 and y = -3
A. 0
B. 2
C. -1
D. 1
Answer: A
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Solve the problem.For a hyperbolic mirror the two foci are 42 cm apart. The distance of the vertex from one focus is 6 cm and from the other focus is 36 cm. Position a coordinate system with the origin at the center of the hyperbola and with the foci on the y-axis. Find the equation of the hyperbola.
A. 
- 
= 5
B. 
- 
= 1
C. 
- 
= 5
D. 
- 
= 1
Use the given feasible region determined by the constraint inequalities to find the minimum possible value of the objective function.f = 3x + 11y subject to the constraints 
A. 0 B. 198 C. 108 D. 323
Solve the problem, rounding the answer as appropriate. Assume that "pure dominant" describes one who has two dominant genes for a given trait; "pure recessive" describes one who has two recessive genes for a given trait; and "hybrid" describes one who has one of each.Two hybrids produce a litter of four offspring. What is the probability that none of the four is pure recessive?
A. .316 B. .75 C. .0625 D. .004
Decide if the given value of x is a critical number for f, and if so, decide whether the point is a relative minimum, relative maximum, or neither.f(x) = 3x4 - 4x3 - 12x2 + 24; x = 0
A. Critical number but not an extreme point B. Critical number, relative maximum at (0, 24) C. Critical number, relative minimum at (0, 24) D. Not a critical number