we know that
in expanded form is equal to

therefore
<u>the answer is</u>

If 30% were perfect, 70% were not perfect. So we know that 70% of the total number of photographs is 210.
p(70/100)=210 multiply both sides by 100
70p=21000 divide both sides by 70
p=300
So there are 300 photographs in all.
Answer:
The simplified expression is:

Step-by-step explanation:
Given the expression

solving the expression

∵
∵ 
∵ 
Therefore, the simplified expression is:

Answer:
perpendicular
Step-by-step explanation:
it isn't parallel because the angles aren't the same.