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Nana76 [90]
3 years ago
15

Lucille has a collection of more than 500 songs on her phone that have a mean duration of 215 seconds

Mathematics
1 answer:
Elena-2011 [213]3 years ago
8 0

Answer:

5

Step-by-step explanation:

The sample mean is given by dividing the standard deviation by the squareroot of SRS

Given standard deviation of 35 and SRS of 49, we know that the squareroot of 49 is 7 ie √49=7

By substituting the given values we can obtain the sample mean as follows.

sample mean=35/√49=35/7=5

The sample mean for the given question is hence 5

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Evaluate the expression when x-3<br> 4x2 - 14x + 4
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Answer:

82

Step-by-step explanation:

Evaluate 4 x^2 - 14 x + 4 where x = -3:

4 x^2 - 14 x + 4 = 4×(-3)^2 - -3×14 + 4

(-3)^2 = 9:

4×9 - 14 (-3) + 4

4×9 = 36:

36 - 14 (-3) + 4

-14 (-3) = 42:

36 + 42 + 4

| 1 |  

| 4 | 2

| 3 | 6

+ | | 4

| 8 | 2:

Answer:  82

6 0
2 years ago
Maria plants 8 tulip bulbs. She gives 3 of the bulbs to her neighbor. What fraction of her bulbs does she give?
Margarita [4]
3/8

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3 0
3 years ago
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Sliva [168]

Answer:

18.75 percent

Step-by-step explanation:

150 / 800 x 100 = 18.75

5 0
1 year ago
Mrs. Woods prepared bags of baked cookies. The graph shows the number of bags and the number of cookies she used.
larisa86 [58]

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Step-by-step explanation

3 0
2 years ago
the population of Glendale this year is 3,200 more than half of last year's population. the population this year is 26,300 which
zmey [24]
26,300 = 1/2x + 3200......with x being last years population
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