I'm not sure why options a. and d. are the same, but you would simply count the number of times x and m appear, while being multiplied together, and multiply the product of xm by that number. in this case, the number is 7, so you should get 7(xm) or 7xm.
The answer is b because no x-value can repeat.
Answer:

Step-by-step explanation:
An equilateral triangle with the side 7x units is inscribed in a circle of radius 2r units.
1. The area of the circle is

2. The area of the equilateral triangle is

3. The area A within the circle but outside the triangle is

We can set up a proportion since we know the ratio between the # of purple marbles and the # of green marbles.
A ratio is a way to compare two different values: for every 8 purple marbles there are 5 green marbles
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</h2><h2 /><h2>when we cross multiply, we get 5p = 240 </h2><h2>we divide both sides by 5 to isolate the variable </h2><h2 /><h3><u>There are 48 purple marbles </u></h3>