18+21=39
33+49=82
Just add them together
Answer: (x+7)^2 + (y-4)^2 = 121 or (x+7)^2 + (y-4)^2 = 11^2
Step-by-step explanation:
Equation of the circle is:
, which is the center 
and the radius 
-Place the center (-7,4) and radius 11 onto that equation:
(if simplified radius needed)
or
Answer:
Rule 3
Step-by-step explanation:
The values correspond to the equation y=3^x
Answer:
C. 12/15
Step-by-step explanation:
2/3, 6/9, and 18/27 all simplify to 2/3. 12/15 does not.
You should be able to multiply 91 by 8 to get the sum of the first 8 tests, then add the score on the 9th test. Then to get the average of the sum of the 9 tests you need to divide it by 9.
((91*8)+78)/9=89.555555555555.... So, 90%
