Convert the rectangular equation to a polar equation that expresses r in terms of ?.x2 + y2 = 25
A. r = 25
B. r = 5
C. r(cos ? + sin ?) = 5
D. r(cos ? + sin ?) = 25
Answer: B
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Evaluate the expression for the given replacement values.x + y - z for x = 5.9, y = 8, z = 0.98
A. 13.02 B. 12.92 C. 14.88 D. -3.08
The table shows, for some particular year, a listing of several income levels and, for each level, the proportion of the population in the level and the probability that a person in that level bought a new car during the year. Given that one of the people who bought a new car during that year is randomly selected, find the probability that that person was in the indicated income category. Round your answer to the nearest hundredth. 
$10,000 - $14,999
A. .06 B. .05 C. .03 D. .02
Solve the equation.|2x2 - x - 1|= 3
A. {
, - 
}
B. {
, 
}
C. {- 
, - 
}
D. no solution
Solve the problem.The area of a triangle with vertices (x1, y1), (x2, y2), and (x3, y3) is 
,where the symbol ± indicates that the appropriate sign should be chosen to yield a positive area. Use this formula to find the area of a triangle whose vertices are (6, 5), (8, -6), and (-7, -8).
A. 
B. 
C. 169
D. 5