Add or subtract.(5x2 + 2x + 2) - (2x2 + 10)
A. 3x2 - 8x + 2
B. 3x2 + 2x - 8
C. 7x2 + 2x + 12
D. 7x2 - 8x + 2
Answer: B
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Factor completely.x2 - x - 90
A. (x + 1)(x - 19) B. (x - 10)(x + 10) C. (x + 10)(x - 9) D. (x + 9)(x - 10)
Rearrange the following equation to solve for f.
1 xc = ÄÄÄÄ 2ãfc a. 1 ÄÄÄÄÄ 2ãcxc b. 2ãcxc c. 2ãcx d. 2ãcf
Provide an appropriate response.Simplify: 
A. 
B. 
C. 
D. 
Identify the problem with the method used to obtain a random sample.Kate is researching drug use amongst U.S. adults and would like to obtain a random sample of U.S. adults. She obtains an alphabetical list of all students at her university. There are 12,906 names on the list. She uses a random number generator to generate 200 numbers between 1 and 12,906. She chooses the names corresponding to those 200 numbers.
A. The sample will be biased because the random number generator might choose the same number more than once. B. The sample will be biased because the random number generator will only choose numbers between 1 and 10,000. Students corresponding to higher numbers cannot be selected. C. The sample will be biased because students at her university are not representative of all U.S. adults.