Add or subtract as indicated.(6x + 18xy - 23y) - (26x - 11xy - 5y)
A. -20x - 29xy - 28y
B. -12x + 20xy + 28
C. -9xy
D. -20x + 29xy - 18y
Answer: D
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Find the equation of the curve described by the given information.Hyperbola: center 
, vertex 
, focus 
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
At one high school, the mean time for running the 100-yard dash is 
with a standard deviation of 0.9 seconds. The times are normally distributed.Find the percent of times that are between 17 and 17.9 seconds.
A. 16% B. 2% C. .5% D. 13.5%
Evaluate the algebraic expression for the indicated variable.
+ c for a = -9, b = 1, c = 19
A. 56 B. -342 C. 304 D. 342
Translate the sentence into if-then form.All work is noble.If it is __________, then it __________.
A. noble; is not work B. work; is noble C. work; is work D. noble; may be work