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WINSTONCH [101]
3 years ago
13

Can you guys check my answers?

Mathematics
1 answer:
skelet666 [1.2K]3 years ago
6 0

Answer:

6. 28pi

7.  correct

Step-by-step explanation:

Formula for circumference: 2*pi*r

Formula for area: pi*r^2

So:

7: radius = diameter/2 = 4.8

4.8*4.8*pi = 23.04

8. not sure

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Given the quadratic function f(x) = 2x + 5x-12, what is the value of f(-2)?
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Answer:

-26

Step-by-step explanation:

first substitute -2 for x : 2(-2)+5(-2)-12

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Answer:

○ \displaystyle 25\%

Step-by-step explanation:

3 → 13 − 16

\displaystyle \frac{Number\:of\:desired\:[favourable]\:outcomes}{Total\:number\:of\:possible\:outcomes} \\ \\ \frac{3}{12} = \frac{1}{4} = 25\%

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Which of the following parallelograms is NOT similar to the others?<br><br> A<br> B<br> C<br> D
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Step-by-step explanation:

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The complete proof for the given parallelogram is given in the image attached below.

<h3>What is a Parallelogram?</h3>

A parallelogram is a quadrilateral whose opposite sides are parallel and also congruent to each other.

The complete proof would be as shown below:

1. ABCD is a parallelogram [given]

2. AB║CD [Definition of parallelogram]

3. ∠1 ≅ ∠2, ∠3 ≅ ∠4 [alternate interior angles theorem]

4. AB ≅ CD [Definition of parallelogram]

5.  ΔABE ≅ ΔCDE [ASA]

6. AE ≅ CE, BE ≅ DE [CPCTC]

7. AC and BD bisects each other at E [definition of segment bisector]

Learn more about parallelogram on:

brainly.com/question/3050890

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