Answer:
70
Step-by-step explanation:
all the angles of a triangle sum 180, so 180 - (70 + 40) = 70
Your choices A and C are the same
but the decimal of 1/11 is 0.090909
so your answer would be 2.09
x=1
3(4x+1)=15
12x+3=15
12x=15-3
12x=12
x=12/12