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2 years ago

14

An exam consists of 15 true-or-false questions. If a student guesses at every answer, what is the probability that he or she wil

l answer exactly 9 questions correctly? (Round your answer to three decimal places.).

1 answer:

Bas_tet [7]2 years ago

4 0

<span>C(15,9) * (1/2)^9 * (1/2)^6 = 5005/32768 = .153 approx</span>

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It always seems to rain on the day after July 4th.

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Answer:

The inductive reasoning is based on A: a limited number of observations

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2 years ago

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3 years ago

The sides of triangle can be represented by x+3, 2x+4 and 3x-1. what would be the perimeter of it were scaled down by half

svlad2 [7]

The perimeter will also be scaled down by half if the original triangle if it were scaled down by half.

<h3>What is the perimeter of a triangle?</h3>

The total length of a triangle's boundary is referred to as its perimeter. It is the total of the triangle's three sides. A triangle's perimeter will be equal to a+b+c if its three sides are a, b, and c.

The sides of the original triangle are:

x+3, 2x+4, 3x-1

The perimeter of the triangle will be

$x+3+2x+4+3x-1\\=6x+6$

If it were scaled down by half then new sides will be

$\frac{x+3}{2} , \frac{2x+4}{2} , \frac{x-1}{2}$

So, the perimeter of the new triangle will be

$\frac{x+3}{2} + \frac{2x+4}{2} + \frac{3x-1}{2}\\=\frac{x+3+2x+4+3x-1}{2} \\=\frac{6x+6}{2}\\ =3x+3$

This is half of the original triangle's perimeter. Therefore, the perimeter of the new triangle is half of the perimeter of the original triangle.

To know more about perimeter of a triangle visit: brainly.com/question/12577324?referrer=searchResults

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1 year ago