The number of stamps with penny in terms of x is 
<em><u>Solution:</u></em>
Given that,
Ryan has x stamps in his collection
Number of stamps of Ryan = x stamps
Let the stamps with penny be "a"
Ryan has 6 times as many stamps as penny
Therefore,
Number of stamps in Ryan = 6 times as many stamps as penny

Thus number of stamps with penny in terms of x is 
B, d, e, f
they all equal 64
C.(x-2)^2+(y+10)^2=9, plug the numbers in the original formula.
Answer:
Step-by-step explanation:
range?