Answer:
Step-by-step explanation:
d^4-81
(d^2)^2-(9)^2
Using formula
(d^2+9)(d^2-9)
Answer:
Perpendicular bisector theorem
Step-by-step explanation:
The illustration of the theorem is:
If point B is a perpendicular bisector of Line AC and the length of AC is 10cm
Then

Where
--- Perpendicular bisector
So, the equation becomes



Recall: 

<u>Answer:</u>
The correct answer option is 'Every tenth student in the main hallway between class.'
<u>Step-by-step explanation:</u>
Every tenth student in the main hallway between class would best represent the sample population since majority of the students transit this hallway unlike the rest of the options.
For instance, polling every tenth student in the library at lunch would result in the favor of views of students who frequently visit the library and polling every tenth student in the student section at the school football game would go in favor of those who prefer sports.
Answer:
The slope of line AB is 2/1
Step by step explanation:
Hope this helps!!
There are 31+42+50+61=184 total females, and 50+61=111 females in grades 11 and 12, so the percentage is 111/184*100=60.33 percent, which can be rounded to 60%.