Answer: Choice A) 15 feet
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x = length of fourth side in quadrilateral ABCD
Have a look at the attached image I've posted. I made a chart that lines up the side lengths from largest to smallest. Note how the first two items in the bottom row are blank. We don't know these values and we don't need to find out in order to find x.
Based on the last two columns of that table, we can form the proportion below, which is then used to isolate x.
30/12 = x/6
30*6 = 12*x ... cross multiply
180 = 12*x
12*x = 180
x = 180/12 ... divide both sides by 12
x = 15
Answer:
Step-by-step explanation:

First piece is 5.2 cm...and second piece is 1.5 times as long
1.5(5.2) = 7.8 cm <== second piece
Answer:

Step-by-step explanation:

Expand brackets.


Subtract both sides by 4.

Subtract 3x on both sides.


Divide both sides by 5.

The circumference of a circle is 36.424 feet right? Well the circles diameter 11.59.