Answer:
x = -2.5
Step-by-step explanation:
Step 1: Write equation
-6.2 - 12.6x = 5.8 - 7.8x
Step 2: Solve for <em>x</em>
<u>Add 12.6x on both sides:</u> -6.2 = 5.8 + 4.8x
<u>Subtract 5.8 on both sides:</u> -12 = 4.8x
<u>Divide both sides by 4.8:</u> x = -2.5
Step 3: Check
<em>Plug in x to verify if it's a solution.</em>
-6.2 - 12.6(-2.5) = 5.8 - 7.8(-2.5)
-6.2 + 31.5 = 5.8 + 19.5
25.3 = 25.3
The formula is

r², and to find r, or radius, you divide the diameter by 2. Your radius is 12.5, so you just plug that into your formula, and you have pi(12.5)², and simplify that to pi(156.25) and then your answer is <span>490.873852123. You probably want to round to the nearest hundredth, I don't know if you have specific directions, but if so your final answer would be 490.87.</span>
Answer:
The answer to the question provided is

All the figures can be proven to be parallelograms by the markings
<h3>How to determine the parallelogram?</h3>
The properties of parallelogram are:
- Parallel opposite sides
- Congruent opposite sides
- Diagonals may or may not be congruent
- Congruent opposite angles
Based on the above properties, all the figures can be proven to be parallelograms
Read more about parallelograms at:
brainly.com/question/3050890
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