Solve the system by the substitution method.
A. (
, -
)
B. (
, 
)
C. (
, 
), (-
, -
)
D. (
, -
), (-
, 
)
Answer: C
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Find the LCD for the list of rational expressions.
, 
A. 3a2 + 12 B. 3a + 4 C. 3a2 + 4 D. 3a(a + 4)
Perform the indicated operation.- 
- 
A. - 
B. - 
C. 
D. - 
Use the Binomial Theorem to expand the binomial.(x+ 5y)4
A. x4 + 4x3y + 6x2y2 + 4xy3 + y4 B. x4 + 20x3y + 150x2y2 + 20xy3 + 625y4 C. x4 + 5x3y + 150x2y2 + 250xy3 + 625y4 D. x4 + 20x3y + 150x2y2 + 500xy3 + 625y4
Tell whether the sampling strategy will result in a random sample from the population under consideration. If it is not random, explain why it is not.A newspaper holds a contest and asks readers to send in their answers to a set of questions. 105 people answer all questions correctly. Of these, 10 will be selected at random to win a trip to Hawaii. The 105 people are listed in alphabetical order. An assistant starts with the first name and rolls a fair die. If the die comes up 6, that person will be selected. If it doesn't come up 6, the assistant moves on to the next person. Once 10 people have been selected, the assistant stops.
What will be an ideal response?