
an is the 'nth' term
a1 is first term
d=common difference (found by doing

)
n=numerical representation of which term
Answer:
9.354kg
Step-by-step explanation:
Answer:
Step-by-step explanation:
25+105+x=180 degree(being sum of the interior angles of a triangle)
130+x=180
x=180-130
x=50 degree