Find the value of the determinant.
A. 0
B. 12
C. -12
D. 20
Answer: C
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Translate the problem situation to a system of equations. Do not solve.Bill & Jose's Discount Cinema sold adult tickets for $5.70 each and children's tickets for $1.60 each. Last Tuesday, a total of $489.90 was collected from 114 movie watchers. How many of each type were sold?
A. x + y = 489.90; 5.70x + 1.60y = $114 B. x + y = 7.30; 5.70x + 1.60y = $489.90 C. x + y = 114; 5.70x + 1.60y = $489.90 D. x - y = 114; 5.70x + 1.60y = $489.90
Write the standard form of the equation of the circle whose radius is r and whose center is (h, k).r = 14; (h, k) = (0, 0)
A. x2 + y2 = 14 B. x2 + y2 = 28 C. x2 + y2 = 196 D. x2 - y2 = 14
Divide and, if possible, simplify.
A. y2
B. y2
C. y2
D. y
Use front-end rounding to round each number. Then, add or subtract the rounded numbers to get an estimated answer. Finally, find the exact answer.estimateexact 
A. Estimate: $36; exact: $31.26 B. Estimate: $36; exact: $31.34 C. Estimate: $33; exact: $31.36 D. Estimate: $36; exact: $31.36