Answer:
7/12 of a mile
Step-by-step explanation:
1/4 + 2/6
1/4 + 1/3
LCM is 12
(3×1 + 4×1)/12
7/12
 
        
                    
             
        
        
        
Craig had p coins. Then he found 66 more coins in a drawer. Write an expression that shows how many coins Craig has now.
p+ 66
 
        
             
        
        
        
Can you add additional information about the problem?
        
             
        
        
        
Answer: Choice A) 15 feet
=====================================
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
 
        
             
        
        
        
<h3>
Answer:  A.  9</h3>
=====================================================
Explanation:
Draw in the segments AO and OC. 
Triangle ABO is congruent to triangle CBO. We can prove this through the use of the HL theorem. HL stands for hypotenuse leg.
Since the triangles are congruent, this means the corresponding pieces AB and BC are the same length.
Then we can say:
AB+BC = AC .... segment addition postulate
AB+AB = AC .... plug in BC = AB
2*AB = AC
2*AB = 18
AB = 18/2 .... divide both sides by 2
AB = 9
In short, the chord AC is bisected by the perpendicular radius drawn in the diagram. So all we do is cut AC = 18 in half to get AB = 9.