Find the center (h, k) and the radius r of the circle. Graph the circle.x2 + y2 - 2x - 4y + 1 = 0
A. (h, k) = (-1, -2); r = 2
B. (h, k) = (1, 2); r = 2
C. (h, k) = (1, 2); r = 4
D. (h, k) = (-1, -2); r = 4
Answer: B
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Expand. Assume that all variables represent positive real numbers.log7
A. log7(12
) - log7s
B. log7s - log712 - 
log7r
C. log712 ? 
log7m ÷ log7s
D. log712 + 
log7r - log7s
Solve the problem.A race track tote board has the odds for a horse listed as 5 to 1. Tote boards list the odds that a horse will lose the race. If this is the case, then what is the probability of the horse winning the race?
A. 
B. 
C. 
D. 6
Write the phrase as a mathematical expression. Use x as the variable.The sum of a number and 15
A. 15x
B. x + 15
C. 
D. x - 15
Solve the problem.The table below gives the number of births, in thousands, to females over the age of 35 for a particular state every two years from 1994 to 2010. 
Use technology to find the quartic function that is the best fit for this data, where x is the number of years after 1994. Round to five decimal places.
A. y = - 0.01723x4 + 0.62258x3 - 6.66654x2 + 18.98367x - 43.26566 B. y = 0.01723x4 - 0.62258x3 + 6.66654x2 - 18.98367x + 43.26566 C. y = 43.26566x4 - 18.98367x3 + 6.66654x2 - 0.62258x + 0.01723 D. y = 0.02223x4 - 0.82248x3 + 8.66654x2 - 15.98367x + 41.96566