Find the center and the radius of the circle.x2 + y2 - 8x - 14y = -29
A. (7, 4); r = 6
B. (4, 7); r = 6
C. (-7, -4); r = 36
D. (-4, -7); r = 36
Answer: B
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Perform the indicated operation. Give the answer in lowest terms.
? 
A. 1
B. 
C. 
D. 
Solve the problem.A 100-liter mixture of chlorine and water is 8% chlorine. (i) Write a rational expression in x whose values give the percentage (in decimal form) of the mixture that is chlorine when x gallons of water are added to the mixture. (ii) Find the percentage of chlorine in the mixture if 70 gallons of water are added to it. Round to the nearest percent, if necessary.
A. (i) 
;
(ii) 11%
B. (i) 
;
(ii) 154%
C. (i) 
;
(ii) 5%
D. (i) 
;
(ii) 8%
Multiply as indicated. If possible, simplify any square roots that appear in the product.(6
- 9)2
A. 27 - 108
B. 99 - 108
C. 189 + 108
D. 189 - 108
In a proof, what reason can be cited that justifies the statement 
?
A. Symmetric Property of Congruence B. Substitution Property of Equality C. Transitive Property of Congruence D. Identity