This is for the first one 85.714286%
This is for the second one
olution for 21 is what percent of 300
100%/x%=300/21
(100/x)*x=(300/21)*x - we multiply both sides of the equation by x
100=14.2857142857*x - we divide both sides of the equation by (14.2857142857) to get x
100/14.2857142857=x
7=x
x=7
now we have:
21 is 7% of 300
Given equation is :
=0
Taking out
common we get,
=0
Now solving this we get,
As 11 is not factor-able, we will solve it using the formula,

a=1 b=5 and c=-11
we get,
and 
Isn't it (-3,3) that's what I think because it's 1 2 3 but I don't know
Hey there, I have attached a graph I made that represents the given function. Since you did not put any other graphs, find the one most similar to my graph!
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6+4+3= 13 coins
There are 20 coins so you have to subtract 20-13+7
So, Ms. Mitchell has 7 nickels in her purse