Question 984964: 1. Solve the system of equations by elimination.
2x2 + 6y2 = 168
2x2 + y2 = 43
Options:
(±3, ±5)
(±5, ±3)
(±3, ±3)
(±5, ±5)
2. A box contains 4 white ribbons and 8 pink ribbons. Determine whether the events of picking a white ribbon and then another white ribbon without replacement are independent or dependent. Then identify the indicated probability.
Options:
independent; 1/11
dependent; 1/12
dependent; 1/11
independent; 1/12
3. Each of 5 boys randomly chooses a watch from 12 different styles. What is the probability that at least 2 boys choose the same type of watch?
Options:
≈ 0.7387
≈ 0.6181
≈ 0.5387
≈ 0.3819
4. Use the standard deviation to identify any outliers in the given data set.
{3, 6, 30, 9, 10, 8, 5, 4}
Options:
3
8
30
none
5. Bill wants to plant roses in his triangular plot. There will be 1 plant at a corner. Each row will have 6 additional plants. He wants the plot to have as many rows as possible with 150 rose plants. How many rows will Bill's plot have?
Options:
5 rows
6 rows
7 rows
8 rows
Answer by ikleyn(52781)   (Show Source):
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