Brian ordered a 12-inch pizza for him and some friends. They ate half of the pizza before they started playing video games. Approximately how much of the pizza is left in the box?

A 38in2
B 57in2
C 113in2
D 144in2

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,

127

whether it's diameter, or radius, i believe if i remember correctly from school, every amount has to always add up to 180. so if you take 53, and starting adding, long story short, taking 127 and adding it to 53, gives you 180.

step-by-step explanation: