What is the answer pls give because I am stuck

Mathematics

2 answers:

Strike441 [17]3 years ago

5 0

Answer:

P = 14 * 22.5/5 = 63

Step-by-step explanation:

Step1. Find perimeter of small triangle

Step2. Find the ratio between 2 triangles

Step3. Multiply

kotegsom [21]3 years ago

4 0

Answer:

63 cm

Step-by-step explanation:

Let k be the constant of proportionality. Then

(5 cm)k = 22.5 cm, or

k = (22.5 cm) / 5 cm = 4.5

Then the hypotenuse and the shorter leg of the orange triangle are found by multiplying 6 cm and 3 cm by 4.5:

4.5(6 cm) = 27 cm

4.5(3 cm) = 13.5 cm

Then the perimeter of the orange triangle is (27 + 13.5 + 22.5) cm, or

63 cm (the last of the four given answers)

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How to solve this problem?

valentinak56 [21]

Very nice handwriting but the math and English are confusing.

Let's assume we're told

$\displaystyle 45 = \sum_{i=1}^9 (x_i - 10)^2$

The subscript is important.

I think we're told the similar sum with 11 gives the smallest possible value for the sum. This is a rather cagey way of telling us 11 is the mean of the nine points. The mean is the number which minimizes the sum of squared deviations.

$\displaystyle 45 = \sum_{i=1}^9 (x_i - 10)^2 = \sum x_i^2 - 20 \sum x_i + 9(100)$