Evaluate using the order of operations.-3.9 - (2.3)2 - (-4.2)
A. -4.99
B. -13.39
C. 2.81
D. 5.59
Answer: A
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Simplify.(2t5)-2
A. 
B. 
C. 4t10
D. 
Determine the number of significant digits in the given approximate number.800
A. 5 B. 1 C. 2 D. 4
Solve using a system of three linear equations.A deli sells three sizes of turkey sandwiches: the small turkey sandwich contains 6 ounces of meat and sells for $3.50; the regular turkey sandwich contains 9 ounces of meat and sells for $4.00; and the large turkey sandwich contains 13 ounces of meat and sells for $4.50. A customer requests a selection of each size for a reception. She and the manager agree on a combination of 50 sandwiches made from 27 pounds 4 ounces of turkey for a total cost of $196. How many of each size sandwich will be in this combination? (Note: 1 pound = 16 ounces)
A. 20 small sandwiches, 16 medium sandwiches, 14 large sandwiches. B. 18 small sandwiches, 22 medium sandwiches, 10 large sandwiches. C. 16 small sandwiches, 28 medium sandwiches, 6 large sandwiches. D. 14 small sandwiches, 18 medium sandwiches, 18 large sandwiches.
Find the decimal form for the rational number. If it repeats, then so indicate with a bar.
A. 1.
B. 1.5
C. 1.56
D. 1.57