Set up the percent proportion, and write "unknown" for the value that is not given. Recall that the percent proportion is 
= 
. Do not try to solve for any unknowns.28% of what is 61?
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Answer: C
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Solve the system by the substitution method. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(8, 7)} B. {(8, 6)} C. {(7, 7)} D. no solution; ?
Estimate an answer to the problem.An advertisement states that television sets are on sale at B&G Electronics. The sale prices are: 
set, $147.99; 
set, $208.95; 
set, $231.99; 27-inch set, $289.97; 
set, $519.97. Estimate the approximate number of 
-4.0px;" /> sets that can be bought for $11,850.
A. 180
B. 20
C. 90
D. 80
Select the graph of the polar equation using symmetry, zeros, maximum r-values, and any
other additional points.
?
?
A. Symmetric with respect to the polar axis
?
B. Symmetric with respect to the polar axis
?
C. Symmetric with respect to the polar axis
?
D. Symmetric with respect to the polar axis
?
E. Symmetric with respect to the polar axis
?
Write the quotient in the form a + bi.
A. 
+ 
i
B. 
+ 
i
C. - 
+ 
i
D. - 
+ 
i