Try three times three times 5. wait let me check for you
As it is a straight line all the angles add up to 180 so 5s+18+48-a+8a-30= 180 so simplified 12a+36=180 then solve to get a=12.17 so then when u put 12.17 as a you get 5 * 12.17 +8 =78.85 then 48-12.17 which is clearly<78.85 then you do the final angle of 8*12.17-30 which is 67.36 so angle AOC is the biggest
To calculate this, we have to divide 2 1/2 by 8.
first, i wil turn 2 1/2 into fraction:
it's

and if we divide this by 8, we multiply the denominator by 8:

and this is the answer!
Answer:
x=-8
Step-by-step explanation:
square root 64 which is 8
-8^2 = -64
-64 -64 = 0
-8^2 + 64 = 0