Answer:
-99
Step-by-step explanation:

Answer:
R=9
Step-by-step explanation:
the formula for area of a circle is pi r squared
where r denotes the radius of the circle
equating the formula for area with the area of the circle provided
p\i r squared = 81 p\i
r squared = 81
r = radical 81
r =9 inches
The slope is 1/7. The formula for slope is: m=y2-y1/x2-x1
The answer For number 2 is D and 3 is B and 4 is C
I hope that helped