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Zielflug [23.3K]
3 years ago
6

84➗2 solve using area model

Mathematics
2 answers:
Ksju [112]3 years ago
5 0
The answer is 42
84
➗2
42
Phantasy [73]3 years ago
3 0
42 and just draw 8 tens and 4 ones and you have your answer:)
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Only a very small (<5) percentage of measurements can be more than 2 standard deviations from the mean of the normal distribu
horsena [70]

Answer:

A. True

Step-by-step explanation:

The empirical rule in statistics states that:

  • 68% of the data will be within 1 standard deviation
  • 95% of the data will be within 2 standard deviations
  • 99.7% of the data will be within 3 standard deviations

So yes, we can state that 5% or less of the data will be more than 2 standard deviations away from the mean. Of course, statistics is not 100% certain, so this rule is not 100% right all the time. Some exceptions might result, but generally speaking, the results should follow the empirical rule.

5 0
2 years ago
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The function f(x) = –x2 – 4x + 5 is shown on the graph. On a coordinate plane, a parabola opens down. It goes through (negative
vagabundo [1.1K]

Considering the vertex of the parabola, the correct statement is given by:

The range of the function is all real numbers less than or equal to 9.

<h3>What is the vertex of a quadratic equation?</h3>

A quadratic equation is modeled by:

y = ax^2 + bx + c

The vertex is given by:

(x_v, y_v)

In which:

  • x_v = -\frac{b}{2a}
  • y_v = -\frac{b^2 - 4ac}{4a}

Considering the coefficient a, we have that:

  • If a < 0, the vertex is a maximum point, which means that the range is all real numbers less than or equal to y_v.
  • If a > 0, the vertex is a minimum point, which means that the range is all real numbers greater than or equal to y_v.

In this problem, we have that:

  • a = -1 < 0, hence the vertex is a maximum point.
  • The vertex is (-2,9).

Hence the range is described by:

The range of the function is all real numbers less than or equal to 9.

More can be learned about the vertex of a parabola at brainly.com/question/24737967

#SPJ1

5 0
1 year ago
Plz find the slope plzzzz
e-lub [12.9K]

Answer:

The slope would be rise over run so you go from point A and rise 4 then go over 8

So 4/8, then to simplify this it would be 1/2, so your slope is 1/2

Step-by-step explanation:

3 0
3 years ago
Find the ratio of the perimeter of the first figure to the perimeter of the second.
ololo11 [35]

Answer:

2:1

Step-by-step explanation:

The perimeter of the first is twice as large as the 2nd

5 0
2 years ago
What is the estimate of 405?
mario62 [17]

Answer:

400


Step-by-step explanation:


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3 years ago
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