Answer:
A and C the other two are just stand alone numbers. so the answers are A and C
Answer:
x+3
Step-by-step explanation:
combine like terms then simple math
Answer:
35
Step-by-step explanation:
x-18=y
y*-3=-51
y=17
x-18=17
17+18=x
x=35
Rotational symmetry is when an object looks the same when rotated around its center by an angle not equal to 0° (0) or any multiple of 360° (2π).