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Alex
3 years ago
9

Solve the system of equations Y=-2x+5 and y=x^2+3x+9

Mathematics
1 answer:
Andre45 [30]3 years ago
4 0

I think

x= -4, -1 and y=13, 8

(-4, 13) and (-1, 8)

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In a large data set the 40th percentile is 125 and the 82nd percentile is 158. Approximately what percentage of observations lie
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Answer:

42% of observations lie between 125 and 158.

Step-by-step explanation:

Interpretation of a percentile

When a value V is said to be in the xth percentile of a set, x% of the values in the set are lower than V and (100-x)% of the values in the set are higher than V.

Two values have a percentile, how many are between then?

In this example, y is larger than x.

When a value V is said to be in the xth percentile of a set, x% of the values in the set are lower than V and (100-x)% of the values in the set are higher than V.

When a value Z is said to be in the yth percentile of a set, y% of the values in the set are lower than V and (100-y)% of the values in the set are higher than V.

Also, (y-x)% of the values are between V and Z.

In this problem, we have that:

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158 is the 82nd percentile

Approximately what percentage of observations lie between 125 and 158

82 - 40 = 42% of observations lie between 125 and 158.

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3 years ago
Marna is playing a game where you score −5 points each time youguess the correct answer. The goal is to get the lowest score. To
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Use function notation to write a recursive formula to represent the sequence: 4, 8, 12, …
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Answer:

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<u>Recursive formula:</u>

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