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dexar [7]
3 years ago
11

Square 1 has a side length of x, and square 2 has a side length of y. Square 2 is formed by joining the midpoints of the sides o

f square 1 in order. If x = 2, find the ratio of the area of square 1 to the area of square 2.
Mathematics
2 answers:
earnstyle [38]3 years ago
7 0
I believe is will be 1:2<span />
marishachu [46]3 years ago
6 0

Answer:

The ratio of the area of square 1 to the area of square 2 is 4:1.

Step-by-step explanation:

Area of a square can be calculated by; A = length × length

For square 1, area A = 2 × 2

                                 = 4

Since square 2 is formed by joining the midpoints of the sides of square 1, thus y = 1.

Area of square 2 = 1 ×  1

                            = 1

Thus the ratio, \frac{A_{1} }{A_{2} } = \frac{4}{1}

                     

Therefore, the ratio of the area of square 1 to the area of square 2 is 4:1.

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mixas84 [53]

Answer:

The approximate probability that at least 2 children have been diagnosed with ASD among the 200 selected children is

0.01 or 1%.

Step-by-step explanation:

Number of selected children = 200

The probability of no child been diagnosed with ASD = P(None) = 198/200 = 0.99

Therefore, the probability of at least two children been diagnosed with ASD = 1 - 0.99 = 0.01.

This is the same as:

If 2 children have been diagnosed with ASD,

therefore, the approximate probability that at least 2 children have been diagnosed is:

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The above are summed up in:

The probability of at least one = 1/200 = 0.05

Therefore, the probability of at least two = 0.05 * 2 = 0.01

b) Generally, to find the probability of at least one event happening, we calculate the probability of none and then subtract that result from 1. That is, P(at least one) = 1 – P(none).  For two events happening, the sum of the probability of at least one in two places is deducted from 1 to get the probability of at least two.

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2 years ago
Which of the following conditions would guarantee that triangles are identical?
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Step-by-step explanation:

1) This would guarantee similarity, but not necessarily that they are identical.

2) The angle has to be included between the two sides, which is not specifed.

3) This would work (SSS congruence)

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