I'm not sure if an equation is needed. Since you put the marble back into the bag the odds are still 50/50 that you will draw either color.
If you would have left it out then it would be dependent because the ratio would change.
Answer: It is a <u>connected series of line segments</u> such as the image shown below.
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Hope this helps!
Answer:

Step-by-step explanation:
Triangles CEF and CAD are similar right triangles (they have the common angle, so by AA postulate they are similar). Similar triangles have proportional corresponding sides, so

Triangles DEF and DBC are similar right triangles (they have the common angle, so by AA postulate they are similar). Similar triangles have proportional corresponding sides, so

Substitute the fraction
from the first equality into the second equality:
![\dfrac{EF}{30}=1-\dfrac{EF}{40}\ [\text{Muliply by 120}]\\ \\4EF=120-3EF\\ \\4EF+3EF=120\\ \\7EF=120\\ \\EF=\dfrac{120}{7}=17\dfrac{1}{7}\ ft](https://tex.z-dn.net/?f=%5Cdfrac%7BEF%7D%7B30%7D%3D1-%5Cdfrac%7BEF%7D%7B40%7D%5C%20%5B%5Ctext%7BMuliply%20by%20120%7D%5D%5C%5C%20%5C%5C4EF%3D120-3EF%5C%5C%20%5C%5C4EF%2B3EF%3D120%5C%5C%20%5C%5C7EF%3D120%5C%5C%20%5C%5CEF%3D%5Cdfrac%7B120%7D%7B7%7D%3D17%5Cdfrac%7B1%7D%7B7%7D%5C%20ft)
Answer:
the top right box
Step-by-step explanation:
Answer:
1/40
Step-by-step explanation:
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