Answer:
radius = 7.0
Step-by-step explanation:
length of arc* 360/ 285 = circumference
-> 34.8 *360/285 = 43.957 cm
circumference = 2*pi*radius
-> 43.957 = 2* 3.14 * radius
->radius = 6.99996 = 7.0 cm
18/3 is 6
-18/3 is -6
-18/(-3) is 6
18/(-3) is -6
The solution is in the attached file
If it is ax^2 + bx + c = 0 then it is a quadratic equation